Evidence for vortices in the pseudogap region of Y1-xPrxBa2Cu3O7 from angular magnetoresistivity measurements -: art. no. 177005

被引：31

作者：

Sandu, V ^{[1
]}

Cimpoiasu, E

Katuwal, T

Li, S

Maple, MB

Almasan, CC

机构：

[1] Kent State Univ, Dept Phys, Kent, OH 44242 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Natl Inst Mat Phys, R-76900 Bucharest, Romania

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.177005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In-plane angular magnetoresistivity Deltarho(ab)(anis) measurements were made on Y1-xPrxBa2Cu3O7-delta single crystals in the pseudogap region. For xgreater than or equal to0.2 single crystals, Deltarho(ab)(anis)(theta) displays a deviation from the typical quasiparticle contribution (proportional tosin(2)theta) for temperatures smaller than a certain value T-phi in the pseudogap region. This deviation is consistent with a flux-flow type contribution to angular magnetoresistivity, indicating the presence of vortexlike excitations above the zero-field critical temperature in the pseudogap region.

引用

页码：177005 / 1

页数：4

共 21 条

[1]

ABRIKOSOV AA, 1957, SOV PHYS JETP, V5, P1774

[2] Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y1-xPrxBa2Cu3O7-delta (0<=x<=0.55) system [J].