"Energy scale directly related to superconductivity in high-Tc cuprates: Universality from the temperature-dependent angle-resolved photoemission of Bi2Sr2Ca2Cu3O10+δ"

Shin-ichiro Ideta: Teppei Yoshida, Atsushi Fujimori, Hiroaki Anzai, Taisuke Fujita, Akihiro Ino, Masashi Arita, Hirohumi Namatame, Masaki Taniguchi, Zhi-Xun Shen, Kenichi Takashima, Kenji Kojima, and Shin-ichi Uchida; Phys. Rev. B , 03/20/12.

Additional Authors: Teppei Yoshida, Atsushi Fujimori, Hiroaki Anzai, Taisuke Fujita, Akihiro Ino, Masashi Arita, Hirohumi Namatame, Masaki Taniguchi, Zhi-Xun Shen, Kenichi Takashima, Kenji Kojima, and Shin-ichi Uchida

Abstract:

We have performed a temperature-dependent angle-resolved photoemission spectroscopy (ARPES) study of the trilayer high-Tc cuprate superconductor (HTSC) Bi2Sr2Ca2Cu3O10+δ (Bi2223), and have shown that the Tc (=110 K) and “effective” superconducting gap Δsc defined at the end point of the Fermi arc follow the relationship 2Δsc≈4kBTc. Combining this result with previous ARPES results on single- and double-layer cuprates, we show that the relationship 2Δsc≈4kBTc holds for various HTSCs.