Magnetoresistance of untwinned YBa2Cu3Oy single crystals in a wide range of doping:: Anomalous hole-doping dependence of the coherence length -: art. no. 167005

被引：88

作者：

Ando, Y ^{[1
]}

Segawa, K ^{[1
]}

机构：

[1] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.88.167005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetoresistance (MR) in the a -axis resistivity of untwinned YBa2Cu O-3(y) single crystals is measured for a wide range of doping (y = 6.45-7.0). The y dependence of the in-plane coherence length xi(ab) estimated from the fluctuation magnetoconductance indicates that the superconductivity is anomalously weakened in the 60-K phase; this observation, together with the Hall coefficient and the a -axis thermopower data which suggest the hole doping to be 12% for y similar or equal to 6.65, gives evidence that the origin of the 60-K plateau is the 1/8 anomaly. At high temperatures, the normal-state MR data show signatures of the Zeeman effect on the pseudogap in underdoped samples.

引用

页数：4

共 31 条

[21]

ONG NP, UNPUB

[22] Quantum critical point associated with the electronic topological transition in a two-dimensional electron system as a driving force for anomalies in underdoped high-Tc cuprates [J].