Nanomaterials : : Volume 2: Quantization and Entropy / / Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.

This monograph investigates the entropy in heavily doped (HD) quantized structures by analyzing under the influence of magnetic quantization, crossed electric and quantizing fields the range from HD quantum confined nonlinear optical materials to HgTe/CdTe HD superlattices with graded interfaces. Fi...

Full description

Saved in:
Bibliographic Details
Superior document:Title is part of eBook package: De Gruyter DG Ebook Package English 2020
VerfasserIn:
Place / Publishing House:Berlin ;, Boston : : De Gruyter, , [2020]
©2020
Year of Publication:2020
Language:English
Online Access:
Physical Description:1 online resource (XLI, 450 p.)
Tags: Add Tag
No Tags, Be the first to tag this record!
id 9783110661194
ctrlnum (DE-B1597)522195
(OCoLC)1153543227
collection bib_alma
record_format marc
spelling Ghatak, Engg Kamakhya Prasad, author. aut http://id.loc.gov/vocabulary/relators/aut
Nanomaterials : Volume 2: Quantization and Entropy / Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.
Berlin ; Boston : De Gruyter, [2020]
©2020
1 online resource (XLI, 450 p.)
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
text file PDF rda
Frontmatter -- Preface -- Acknowledgments -- Contents -- About the Authors -- Symbols -- Part I: Entropy in heavily doped quantum confined nonparabolic materials -- 1 The entropy in quantum wells of heavily doped materials -- 2 The entropy in nanowires of heavily doped materials -- 3 Entropy in quantum box of heavily doped materials -- 4 Entropy in heavily doped materials under magnetic quantization -- 5 The entropy in heavily doped nanomaterials under magneto-size quantization -- Part II: Entropy in heavily doped quantum confined superlattices -- 6 Entropy in quantum wires of heavily doped superlattices -- 7 Entropy in quantum dot HDSLs -- 8 Entropy in HDSLs under magnetic quantization -- 9 Conclusion and scope for future research -- 10 Appendix A: The entropy under intense electric field in HD Kane type materials -- 11 Appendix B: Entropy in doping superlattices of HD nanomaterials -- 12 Appendix C: Entropy in QWHDSLs under magnetic quantization -- 13 Appendix D: Entropy in accumulation and inversion layers of non-parabolic materials -- 14 Appendix E: Entropy in HDs under cross-fields configuration -- 15 Appendix F: The numerical values of the energy band constants of few materials -- Materials Index -- Subject index
restricted access http://purl.org/coar/access_right/c_16ec online access with authorization star
This monograph investigates the entropy in heavily doped (HD) quantized structures by analyzing under the influence of magnetic quantization, crossed electric and quantizing fields the range from HD quantum confined nonlinear optical materials to HgTe/CdTe HD superlattices with graded interfaces. Finally the authors address various challenges in today’s research of optoelectronic materials and give an outlook to future studies.
Issued also in print.
Mode of access: Internet via World Wide Web.
In English.
Description based on online resource; title from PDF title page (publisher's Web site, viewed 27. Jan 2023)
SCIENCE / Nanoscience. bisacsh
Mitra, Madhuchhanda, author. aut http://id.loc.gov/vocabulary/relators/aut
Title is part of eBook package: De Gruyter DG Ebook Package English 2020 9783110696288
Title is part of eBook package: De Gruyter DG Plus DeG Package 2020 Part 1 9783110696271
Title is part of eBook package: De Gruyter De Gruyter English eBooks 2020 - UC 9783110659061
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE DG 2019 English 9783110616859
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2020 English 9783110704716
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2020 9783110704518 ZDB-23-DGG
Title is part of eBook package: De Gruyter EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020 English 9783110704754
Title is part of eBook package: De Gruyter EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020 9783110704556 ZDB-23-DPC
EPUB 9783110659993
print 9783110659726
https://doi.org/10.1515/9783110661194
https://www.degruyter.com/isbn/9783110661194
Cover https://www.degruyter.com/document/cover/isbn/9783110661194/original
language English
format eBook
author Ghatak, Engg Kamakhya Prasad,
Ghatak, Engg Kamakhya Prasad,
Mitra, Madhuchhanda,
spellingShingle Ghatak, Engg Kamakhya Prasad,
Ghatak, Engg Kamakhya Prasad,
Mitra, Madhuchhanda,
Nanomaterials : Volume 2: Quantization and Entropy /
Frontmatter --
Preface --
Acknowledgments --
Contents --
About the Authors --
Symbols --
Part I: Entropy in heavily doped quantum confined nonparabolic materials --
1 The entropy in quantum wells of heavily doped materials --
2 The entropy in nanowires of heavily doped materials --
3 Entropy in quantum box of heavily doped materials --
4 Entropy in heavily doped materials under magnetic quantization --
5 The entropy in heavily doped nanomaterials under magneto-size quantization --
Part II: Entropy in heavily doped quantum confined superlattices --
6 Entropy in quantum wires of heavily doped superlattices --
7 Entropy in quantum dot HDSLs --
8 Entropy in HDSLs under magnetic quantization --
9 Conclusion and scope for future research --
10 Appendix A: The entropy under intense electric field in HD Kane type materials --
11 Appendix B: Entropy in doping superlattices of HD nanomaterials --
12 Appendix C: Entropy in QWHDSLs under magnetic quantization --
13 Appendix D: Entropy in accumulation and inversion layers of non-parabolic materials --
14 Appendix E: Entropy in HDs under cross-fields configuration --
15 Appendix F: The numerical values of the energy band constants of few materials --
Materials Index --
Subject index
author_facet Ghatak, Engg Kamakhya Prasad,
Ghatak, Engg Kamakhya Prasad,
Mitra, Madhuchhanda,
Mitra, Madhuchhanda,
Mitra, Madhuchhanda,
author_variant e k p g ekp ekpg
e k p g ekp ekpg
m m mm
author_role VerfasserIn
VerfasserIn
VerfasserIn
author2 Mitra, Madhuchhanda,
Mitra, Madhuchhanda,
author2_variant m m mm
author2_role VerfasserIn
VerfasserIn
author_sort Ghatak, Engg Kamakhya Prasad,
title Nanomaterials : Volume 2: Quantization and Entropy /
title_sub Volume 2: Quantization and Entropy /
title_full Nanomaterials : Volume 2: Quantization and Entropy / Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.
title_fullStr Nanomaterials : Volume 2: Quantization and Entropy / Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.
title_full_unstemmed Nanomaterials : Volume 2: Quantization and Entropy / Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.
title_auth Nanomaterials : Volume 2: Quantization and Entropy /
title_alt Frontmatter --
Preface --
Acknowledgments --
Contents --
About the Authors --
Symbols --
Part I: Entropy in heavily doped quantum confined nonparabolic materials --
1 The entropy in quantum wells of heavily doped materials --
2 The entropy in nanowires of heavily doped materials --
3 Entropy in quantum box of heavily doped materials --
4 Entropy in heavily doped materials under magnetic quantization --
5 The entropy in heavily doped nanomaterials under magneto-size quantization --
Part II: Entropy in heavily doped quantum confined superlattices --
6 Entropy in quantum wires of heavily doped superlattices --
7 Entropy in quantum dot HDSLs --
8 Entropy in HDSLs under magnetic quantization --
9 Conclusion and scope for future research --
10 Appendix A: The entropy under intense electric field in HD Kane type materials --
11 Appendix B: Entropy in doping superlattices of HD nanomaterials --
12 Appendix C: Entropy in QWHDSLs under magnetic quantization --
13 Appendix D: Entropy in accumulation and inversion layers of non-parabolic materials --
14 Appendix E: Entropy in HDs under cross-fields configuration --
15 Appendix F: The numerical values of the energy band constants of few materials --
Materials Index --
Subject index
title_new Nanomaterials :
title_sort nanomaterials : volume 2: quantization and entropy /
publisher De Gruyter,
publishDate 2020
physical 1 online resource (XLI, 450 p.)
Issued also in print.
contents Frontmatter --
Preface --
Acknowledgments --
Contents --
About the Authors --
Symbols --
Part I: Entropy in heavily doped quantum confined nonparabolic materials --
1 The entropy in quantum wells of heavily doped materials --
2 The entropy in nanowires of heavily doped materials --
3 Entropy in quantum box of heavily doped materials --
4 Entropy in heavily doped materials under magnetic quantization --
5 The entropy in heavily doped nanomaterials under magneto-size quantization --
Part II: Entropy in heavily doped quantum confined superlattices --
6 Entropy in quantum wires of heavily doped superlattices --
7 Entropy in quantum dot HDSLs --
8 Entropy in HDSLs under magnetic quantization --
9 Conclusion and scope for future research --
10 Appendix A: The entropy under intense electric field in HD Kane type materials --
11 Appendix B: Entropy in doping superlattices of HD nanomaterials --
12 Appendix C: Entropy in QWHDSLs under magnetic quantization --
13 Appendix D: Entropy in accumulation and inversion layers of non-parabolic materials --
14 Appendix E: Entropy in HDs under cross-fields configuration --
15 Appendix F: The numerical values of the energy band constants of few materials --
Materials Index --
Subject index
isbn 9783110661194
9783110696288
9783110696271
9783110659061
9783110616859
9783110704716
9783110704518
9783110704754
9783110704556
9783110659993
9783110659726
url https://doi.org/10.1515/9783110661194
https://www.degruyter.com/isbn/9783110661194
https://www.degruyter.com/document/cover/isbn/9783110661194/original
illustrated Not Illustrated
doi_str_mv 10.1515/9783110661194
oclc_num 1153543227
work_keys_str_mv AT ghatakenggkamakhyaprasad nanomaterialsvolume2quantizationandentropy
AT mitramadhuchhanda nanomaterialsvolume2quantizationandentropy
status_str n
ids_txt_mv (DE-B1597)522195
(OCoLC)1153543227
carrierType_str_mv cr
hierarchy_parent_title Title is part of eBook package: De Gruyter DG Ebook Package English 2020
Title is part of eBook package: De Gruyter DG Plus DeG Package 2020 Part 1
Title is part of eBook package: De Gruyter De Gruyter English eBooks 2020 - UC
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE DG 2019 English
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2020 English
Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2020
Title is part of eBook package: De Gruyter EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020 English
Title is part of eBook package: De Gruyter EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020
is_hierarchy_title Nanomaterials : Volume 2: Quantization and Entropy /
container_title Title is part of eBook package: De Gruyter DG Ebook Package English 2020
author2_original_writing_str_mv noLinkedField
noLinkedField
_version_ 1806144506080264192
fullrecord <?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>05486nam a22008535i 4500</leader><controlfield tag="001">9783110661194</controlfield><controlfield tag="003">DE-B1597</controlfield><controlfield tag="005">20230127011820.0</controlfield><controlfield tag="006">m|||||o||d||||||||</controlfield><controlfield tag="007">cr || ||||||||</controlfield><controlfield tag="008">230127t20202020gw fo d z eng d</controlfield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9783110661194</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1515/9783110661194</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-B1597)522195</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)1153543227</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-B1597</subfield><subfield code="b">eng</subfield><subfield code="c">DE-B1597</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="044" ind1=" " ind2=" "><subfield code="a">gw</subfield><subfield code="c">DE</subfield></datafield><datafield tag="072" ind1=" " ind2="7"><subfield code="a">SCI050000</subfield><subfield code="2">bisacsh</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Ghatak, Engg Kamakhya Prasad, </subfield><subfield code="e">author.</subfield><subfield code="4">aut</subfield><subfield code="4">http://id.loc.gov/vocabulary/relators/aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Nanomaterials :</subfield><subfield code="b">Volume 2: Quantization and Entropy /</subfield><subfield code="c">Engg Kamakhya Prasad Ghatak, Madhuchhanda Mitra.</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Berlin ;</subfield><subfield code="a">Boston : </subfield><subfield code="b">De Gruyter, </subfield><subfield code="c">[2020]</subfield></datafield><datafield tag="264" ind1=" " ind2="4"><subfield code="c">©2020</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 online resource (XLI, 450 p.)</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">computer</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">online resource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="347" ind1=" " ind2=" "><subfield code="a">text file</subfield><subfield code="b">PDF</subfield><subfield code="2">rda</subfield></datafield><datafield tag="505" ind1="0" ind2="0"><subfield code="t">Frontmatter -- </subfield><subfield code="t">Preface -- </subfield><subfield code="t">Acknowledgments -- </subfield><subfield code="t">Contents -- </subfield><subfield code="t">About the Authors -- </subfield><subfield code="t">Symbols -- </subfield><subfield code="t">Part I: Entropy in heavily doped quantum confined nonparabolic materials -- </subfield><subfield code="t">1 The entropy in quantum wells of heavily doped materials -- </subfield><subfield code="t">2 The entropy in nanowires of heavily doped materials -- </subfield><subfield code="t">3 Entropy in quantum box of heavily doped materials -- </subfield><subfield code="t">4 Entropy in heavily doped materials under magnetic quantization -- </subfield><subfield code="t">5 The entropy in heavily doped nanomaterials under magneto-size quantization -- </subfield><subfield code="t">Part II: Entropy in heavily doped quantum confined superlattices -- </subfield><subfield code="t">6 Entropy in quantum wires of heavily doped superlattices -- </subfield><subfield code="t">7 Entropy in quantum dot HDSLs -- </subfield><subfield code="t">8 Entropy in HDSLs under magnetic quantization -- </subfield><subfield code="t">9 Conclusion and scope for future research -- </subfield><subfield code="t">10 Appendix A: The entropy under intense electric field in HD Kane type materials -- </subfield><subfield code="t">11 Appendix B: Entropy in doping superlattices of HD nanomaterials -- </subfield><subfield code="t">12 Appendix C: Entropy in QWHDSLs under magnetic quantization -- </subfield><subfield code="t">13 Appendix D: Entropy in accumulation and inversion layers of non-parabolic materials -- </subfield><subfield code="t">14 Appendix E: Entropy in HDs under cross-fields configuration -- </subfield><subfield code="t">15 Appendix F: The numerical values of the energy band constants of few materials -- </subfield><subfield code="t">Materials Index -- </subfield><subfield code="t">Subject index</subfield></datafield><datafield tag="506" ind1="0" ind2=" "><subfield code="a">restricted access</subfield><subfield code="u">http://purl.org/coar/access_right/c_16ec</subfield><subfield code="f">online access with authorization</subfield><subfield code="2">star</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">This monograph investigates the entropy in heavily doped (HD) quantized structures by analyzing under the influence of magnetic quantization, crossed electric and quantizing fields the range from HD quantum confined nonlinear optical materials to HgTe/CdTe HD superlattices with graded interfaces. Finally the authors address various challenges in today’s research of optoelectronic materials and give an outlook to future studies.</subfield></datafield><datafield tag="530" ind1=" " ind2=" "><subfield code="a">Issued also in print.</subfield></datafield><datafield tag="538" ind1=" " ind2=" "><subfield code="a">Mode of access: Internet via World Wide Web.</subfield></datafield><datafield tag="546" ind1=" " ind2=" "><subfield code="a">In English.</subfield></datafield><datafield tag="588" ind1="0" ind2=" "><subfield code="a">Description based on online resource; title from PDF title page (publisher's Web site, viewed 27. Jan 2023)</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">SCIENCE / Nanoscience.</subfield><subfield code="2">bisacsh</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Mitra, Madhuchhanda, </subfield><subfield code="e">author.</subfield><subfield code="4">aut</subfield><subfield code="4">http://id.loc.gov/vocabulary/relators/aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">DG Ebook Package English 2020</subfield><subfield code="z">9783110696288</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">DG Plus DeG Package 2020 Part 1</subfield><subfield code="z">9783110696271</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">De Gruyter English eBooks 2020 - UC</subfield><subfield code="z">9783110659061</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">EBOOK PACKAGE COMPLETE DG 2019 English</subfield><subfield code="z">9783110616859</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">EBOOK PACKAGE COMPLETE 2020 English</subfield><subfield code="z">9783110704716</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">EBOOK PACKAGE COMPLETE 2020</subfield><subfield code="z">9783110704518</subfield><subfield code="o">ZDB-23-DGG</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020 English</subfield><subfield code="z">9783110704754</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020</subfield><subfield code="z">9783110704556</subfield><subfield code="o">ZDB-23-DPC</subfield></datafield><datafield tag="776" ind1="0" ind2=" "><subfield code="c">EPUB</subfield><subfield code="z">9783110659993</subfield></datafield><datafield tag="776" ind1="0" ind2=" "><subfield code="c">print</subfield><subfield code="z">9783110659726</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1515/9783110661194</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://www.degruyter.com/isbn/9783110661194</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="3">Cover</subfield><subfield code="u">https://www.degruyter.com/document/cover/isbn/9783110661194/original</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-061685-9 EBOOK PACKAGE COMPLETE DG 2019 English</subfield><subfield code="b">2019</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-065906-1 De Gruyter English eBooks 2020 - UC</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-069627-1 DG Plus DeG Package 2020 Part 1</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-069628-8 DG Ebook Package English 2020</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-070471-6 EBOOK PACKAGE COMPLETE 2020 English</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-070475-4 EBOOK PACKAGE Physics, Chemistry, Mat.Sc, Geosc 2020 English</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_BACKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_CL_CHCOMSGSEN</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_CL_MTPY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_DGALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EBACKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EBKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_ECL_CHCOMSGSEN</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_ECL_MTPY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EEBKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_ESTMALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_STMALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV-deGruyter-alles</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA12STME</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA13ENGE</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA18STMEE</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA5EBK</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-23-DGG</subfield><subfield code="b">2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-23-DPC</subfield><subfield code="b">2020</subfield></datafield></record></collection>