MOMENTUM DISTRIBUTION IN KAPPA-(BEDT-TTF)2CU[N(CN)2]BR ORGANIC SUPERCONDUCTOR MEASURED BY POSITRON-ANNIHILATION - SEARCH FOR THE FERMI-SURFACE

被引：9

作者：

JEAN, YC

LOU, Y

YEN, HL

OBRIEN, KM

WEST, RN

WANG, HH

CARLSON, KD

WILLIAMS, JM

机构：

[1] UNIV TEXAS,DEPT PHYS,ARLINGTON,TX 76019

[2] ARGONNE NATL LAB,DIV CHEM & MAT SCI,ARGONNE,IL 60439

来源：

PHYSICA C | 1994年 / 221卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90246-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the first precise measurement of the positron-electron momentum distribution in an organic superconducting single crystal kappa-(BEDT-TTF)2Cu[N(CN)2] Br by the 2D-ACAR method. The anisotropy in the raw spectrum has the appropriate symmetry and is consistent with the structure factors of the space group of the crystal. The LCW-folded k-space density is discussed and compared with the Fermi surface prediction of a HMO calculation. Substantial discrepancies between the experimental results and the existing theory are found.

引用

页码：399 / 404

页数：6