Low-temperature normal-state resistivity of high-Tc cuprates

被引：0
|
作者：
Ando, Yoichi [1 ]
Boebinger, G.S. [1 ]
Passner, A. [1 ]
Wang, N.L. [1 ]
Geibel, C. [1 ]
Steglich, F. [1 ]
Kimura, T. [1 ]
Okuya, M. [1 ]
Shimoyama, J. [1 ]
Kishio, K. [1 ]
Tamasaku, K. [1 ]
Ichikawa, N. [1 ]
Uchida, S. [1 ]
机构：
[1] Lucent Technologies, Murray Hill, United States
来源：
Physica C: Superconductivity and its Applications | 1997年 / 282-287卷 / pt 1期
关键词：
Bismuth compounds - Doping (additives) - Electric conductivity measurement - High temperature superconductors - Lanthanum compounds - Low temperature properties - Magnetic fields - Strontium;
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学科分类号：
摘要：
The results of low-temperature normal-state resistivity measurements of La2-xSrxCuO4 (LSCO) and Bi2Sr2-xLaxCuOy (Bi-2201) using 61-T pulsed magnetic fields are summarized. Measurements of LSCO with various Sr doping reveal (1) an insulator-to-metal crossover in the normal state that takes place near optimum doping and (2) unusual log(1/T) divergence of both ρab and ρc of insulating underdoped samples. In particularly clean Bi-2201 crystals, metallic in-plane resistivity and insulating c-axis resistivity are found to coexist down to the lowest experimental temperature. Recent measurements of the low-temperature normal-state Hall effect on Bi-2201 find an essentially temperature-independent Hall coefficient below 20 K, which suggests that the unusual insulating behavior does not come from conventional disorder-enhanced electron interactions.
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页码：240 / 243
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