Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)

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Nodal Gap Energy in High-Tc Cuprate Superconductors: A new Paradigm

Authors
Hiroaki Anzai, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Motoyuki Ishikado, Kazuhiro Fujita, Shigeyuki Ishida, Shinichi Uchida, Akihiro Ino
Corresponding Author
Hiroaki Anzai
Available Online June 2016.
DOI
10.2991/ame-16.2016.82How to use a DOI?
Keywords
High-Tc superconductivity, Angle-resolved photoemission spectroscopy.
Abstract

In high-Tc cuprate superconductors, the d-wave-like superconducting gap appears to depart from the standard proportionality with critical temperature Tc, and shows different doping dependences between the nodal and antinodal regions of momentum space. The failure of the attempts so far to formulate these momentum-resolved gaps with Tc has posed questions to their roles in electron pairing and their mutual relationship. Here, we report a simple proportional relation between nodal gap and critical temperature in superconducting Bi2Sr2CaCu2O8+ and Bi2Sr1.6La0.4CuO6+ . Using low-energy synchrotron radiation on angle-resolved photoemission spectroscopy, we observed the strongly curved gap profile in the underdoped cuprates, and found that a nodal-gap component 2 N at the nodal limit of the gap slope closely follows 8.5kBTc and concomitantly related to the antinodal-gap energy * through a reduction factor of square-root superfluid density s. These empirical formulae provide a new gap-based paradigm on the principle governing Tc in strong-coupling superconductors.

Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
Series
Advances in Engineering Research
Publication Date
June 2016
ISBN
10.2991/ame-16.2016.82
ISSN
2352-5401
DOI
10.2991/ame-16.2016.82How to use a DOI?
Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

risenwbib
TY  - CONF
AU  - Hiroaki Anzai
AU  - Masashi Arita
AU  - Hirofumi Namatame
AU  - Masaki Taniguchi
AU  - Motoyuki Ishikado
AU  - Kazuhiro Fujita
AU  - Shigeyuki Ishida
AU  - Shinichi Uchida
AU  - Akihiro Ino
PY  - 2016/06
DA  - 2016/06
TI  - Nodal Gap Energy in High-Tc Cuprate Superconductors: A new Paradigm
BT  - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
PB  - Atlantis Press
SP  - 495
EP  - 503
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-16.2016.82
DO  - 10.2991/ame-16.2016.82
ID  - Anzai2016/06
ER  -