Hall coefficients in the superconductor-insulator transition of Bi2+xSr2-xCuOy: Measurement of Hall-bar shaped single crystals fabricated by excimer-laser cutting

被引：2

作者：

Inagaki, K ^{[1
]}

Tanda, S ^{[1
]}

Sajiki, K ^{[1
]}

机构：

[1] KOMATSU LTD,DIV RES,KANAGAWA 254,JAPAN

来源：

APPLIED PHYSICS LETTERS | 1996年 / 69卷 / 20期

关键词：

D O I：

10.1063/1.116844

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hall coefficients and resistivities of a series of Bi2+xSr2-xCuOy single crystals were measured to investigate the relation between the carrier concentration and the disorder of the system in the superconductor-insulator transition. Excimer-laser cutting technique was applied to fabricate the Hall-bar shaped samples in order to determine precisely the transport properties of the single crystals. The Hall coefficients were found to be independent of the temperature, which suggests Coulomb interaction was negligible in the localized regime of Bi2+xSr2-xCuOy. We found the Ioffe-Legel condition k(F)l similar to 1 laid around n(0) similar to 8 x 10(20) cm(-3) in this system, and the carriers in the localized regime were essentially ''metallic.'' (C) 1996 American Institute of Physics.

引用

页码：3075 / 3077

页数：3

共 11 条

[1] SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].