ADDITIVE QUASI-PARTICLE AND VORTEX HALL CONDUCTIVITIES IN LA2-XSRXCUO4 AND UNTWINNED YBA2CU3O6.93

被引：33

作者：

HARRIS, JM

ONG, NP

MATL, P

GAGNON, R

TAILLEFER, L

KIMURA, T

KITAZAWA, K

机构：

[1] MCGILL UNIV, DEPT PHYS, MONTREAL, PQ H3A 2T8, CANADA

[2] UNIV TOKYO, DEPT APPL CHEM, BUNKYO KU, TOKYO 113, JAPAN

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.51.12053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The flux-flow Hall conductivity σxy in untwinned YBa2Cu3O6.93 (YBCO) is determined from Hall and resistivity measurements with the current applied along the a and the b axes. We show that sign reversal results from competition between a positive quasiparticle current (∼H) and a negative vortex-motion term (∼1/H). The Hall drag coefficient in YBCO is measured to be α(T)=-4.4×10-8(1-T/Tc) N s/m2 (75<T<93 K). In single-crystal La2-xSrxCuO4, a similar decomposition into quasiparticle and vortex currents (both positive) is possible even though σxy shows no sign reversal. © 1995 The American Physical Society.

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页码：12053 / 12056

页数：4

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