Doping- and Momentum-Dependent Superconducting Gap of Bilayer Cuprate Bi2Sr2CaCu2O8+ Revealed Using Low-energy ARPES

DOI

10.2991/ame-16.2016.95How to use a DOI?

Keywords

High-Tc Superconductivity, Angle-resolved Photoemission Spectroscopy.

Abstract

We report a systematic study of angle-resolved photoemission spectroscopy on Bi2Sr2CaCu2O8+ by using low-energy synchrotron radiation. Our focus is on delineating the doping- and momentum-dependent superconducting gap of the bilayer split bands, which are associated with the intracell hybridization of electrons between the two CuO2 planes. From highly detailed information of gap profile along Fermi surfaces of bonding and antibonding bands, we revealed that a transition temperature Tc is proportional to a nodal-gap energy N. This result is quantitatively consistent with our findings that the nodal-gap component 2 N is relevant to the antinodal-gap energy * through a reduction factor of square-root superfluid density s, as formulated by . This empirical formula makes an essential contribution to the mechanisms for the unconventional superconductivity.

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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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  - Doping- and Momentum-Dependent Superconducting Gap of Bilayer Cuprate Bi2Sr2CaCu2O8+ Revealed Using Low-energy ARPES
BT  - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
PB  - Atlantis Press
SP  - 579
EP  - 583
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-16.2016.95
DO  - 10.2991/ame-16.2016.95
ID  - Anzai2016/06
ER  -