Universal versus Material-Dependent Two-Gap Behaviors of the High-Tc Cuprate Superconductors: Angle-Resolved Photoemission Study of La2-xSrxCuO4

被引：112

作者：

Yoshida, T. ^{[1
]}

Hashimoto, M. ^{[1
]}

Ideta, S. ^{[1
]}

Fujimori, A. ^{[1
]}

Tanaka, K. ^{[2
,3
]}

Mannella, N. ^{[2
,3
]}

Hussain, Z. ^{[4
]}

Shen, Z. -X. ^{[2
,3
]}

Kubota, M. ^{[5
]}

Ono, K. ^{[5
]}

Komiya, Seiki ^{[6
]}

Ando, Yoichi ^{[7
]}

Eisaki, H. ^{[8
]}

Uchida, S. ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] KEK, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[6] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan

[7] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

[8] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 03期

关键词：

UNDERDOPED BI2212; PSEUDOGAP; GAP; LIQUID; STATE; PHASE; MODEL;

D O I：

10.1103/PhysRevLett.103.037004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the doping and temperature dependences of the pseudogap and superconducting gap in the single-layer cuprate La2-xSrxCuO4 by angle-resolved photoemission spectroscopy. The results clearly exhibit two distinct energy and temperature scales, namely, the gap around (pi, 0) of magnitude Delta(*) and the gap around the node characterized by the d-wave order parameter Delta(0). In comparison with Bi2212 having higher T-c's, Delta(0) is smaller, while Delta(*) and T-* are similar. This result suggests that Delta(*) and T-* are approximately material-independent properties of a single CuO2 plane, in contrast to the material-dependent Delta(0), representing the pairing strength.

引用

页数：4

共 35 条

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