SUPERCONDUCTING ENERGY-GAP IN BI1.8PB0.4SR2CA2CU3O10+DELTA STUDIED BY PHOTOEMISSION SPECTROSCOPY

被引：14
|
作者：
GU, C
VEAL, BW
LIU, R
PAULIKAS, AP
KOSTIC, P
DING, H
CAMPUZANO, JC
ANDREWS, BA
BLYTH, RIR
ARKO, AJ
MANUEL, P
KAUFMAN, DY
LANAGAN, MT
机构：
[1] UNIV ILLINOIS,CHICAGO,IL 60680
[2] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
[3] ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439
来源：
PHYSICAL REVIEW B | 1995年 / 51卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.51.1397
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report photoemission measurements on highly textured polycrystalline samples of Bi1.8Pb0.4Sr2Ca2Cu3O10+δ (Bi-2223, Tc=104 K). High-resolution data show a superconducting gap opening below Tc. The gap-spectrum line shape suggests an anisotropic gap structure in the Brillouin zone. The maximum gap in Bi-2223 is estimated to be 29 meV so that 2Δ/kTc∼6.5, somewhat larger than the reduced gap in Bi2Sr2CaCu2O8 (Bi-2212). A spectral dip feature is observed at 72 meV in the superconducting state. The results are compared with angle-resolved experiments on Bi-2212 single crystals. © 1995 The American Physical Society.
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收藏
页码：1397 / 1400
页数：4
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