ELECTRONIC-STRUCTURE AND SUPERCONDUCTING ENERGY-GAP IN RB3C60 SINGLE-CRYSTALS STUDIED BY PHOTOEMISSION SPECTROSCOPY

被引：26

作者：

GU, C

VEAL, BW

LIU, R

PAULIKAS, AP

KOSTIC, P

DING, H

GOFRON, K

CAMPUZANO, JC

SCHLUETER, JA

WANG, HH

GEISER, U

WILLIAMS, JM

机构：

[1] UNIV ILLINOIS,CHICAGO,IL 60680

[2] ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.50.16566

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an ultrahigh-resolution photoemission study of Rb3C60 single crystals (Tc=30.5 K) and the measurement of the superconducting energy gap. The crystals were cleaved at 13 K to expose the (111) plane. They show a sharp Fermi cutoff above Tc and a superconducting gap opening below Tc (2Δ/kBTc∼4.1 at 13 K). The valence band shows a ∼0.15-eV-wide band near EF that is consistent with calculations, and a broad band at 0.15-1.3 eV, possibly contributed by the surface C60 layer. © 1994 The American Physical Society.

引用

页码：16566 / 16569

页数：4

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