STUDY OF THE TRANSPORT PROPERTIES IN Ca DOPING NdCeCuO SYSTEM

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Abstract
In order to investigate the nature of the charge carriers in NdCeCuO system, we prepared Nd1.85-xCe0.15CaxCuO4-δ and Nd2-xCaxCuO4-δ , and studied transport properties of them. With increasing Ca concentration, the sign of Hall coefficient is changed from negative to positive. The hole state in CuO2 plane arises from the lattice distortion induced by Ca doping, which leads to the- O2p band pass through the Fermi level.
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RUAN KE-QING²,

CHEN XIAN-HUI²,

FENG YU²,

WANG CHENG-YOU²,

CAO LIE-ZHAO²,

JIA YUN-BO¹

(1)中国科学技术大学结构分析开放研究实验室; (2)中国科学技术大学结构分析开放研究实验室;中国科学技术大学物理系
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