Temperature behavior of conductivity in a La2CuO4 + δ single crystal upon the paramagnetic-antiferromagnetic transition

被引：0
作者：
N. V. Dalakova
B. I. Belevtsev
A. S. Panfilov
E. Yu. Belyaev
机构：
[1] National Academy of Sciences of Ukraine,Verkin Institute for Low Temperature Physics and Engineering
来源：
Bulletin of the Russian Academy of Sciences: Physics | 2011年 / 75卷 / 5期
关键词：
Resistive Transition; Cuprate Superconductor; Metamagnetic Transi Tion; Underdoped Cuprate; Weak Ferro Magnetic State;
D O I：
10.3103/S1062873811050133
中图分类号：
学科分类号：
摘要：
The temperature dependence of the resistance of a La2CuO4 + δ (δ ≈ 0.05) single crystal with the Neel temperature TN ≈ 205 K was investigated in order to establish the correlation between the transport and magnetic properties of the crystal. The R(T) dependence near TN reveals a kink related to the enhancement of sample’s conductivity upon the transition from the antiferromagnetic to paramagnetic state. With an increase in temperature far above TN, the transition from the dielectric (dR/dT < 0) to metal (dR/dT > 0) occurs. The observed behavior of resistance is attributed to delocalization of carriers above TN.
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页码：692 / 694
页数：2
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