CuSe-based layered compound Bi$_{2}$YO$_{4}$Cu$_{2}$Se$_{2}$ as a quasi-two-dimensional metal

S. G. Tan; D. F. Shao; W. J. Lu; B. Yuan; Y. Liu; J. Yang; W. H. Song; Hechang Lei; Y. P. Sun

doi:10.1103/PhysRevB.90.085144

paper

CuSe-based layered compound Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ as a quasi-two-dimensional metal

arXiv:1403.7892 · doi:10.1103/PhysRevB.90.085144

Abstract

We have investigated the physical properties of a new layered oxyselenide Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ , which crystallizes in an unusual intergrowth structure with Cu $_{2}$ Se $_{2}$ and Bi $_{2}$ YO $_{4}$ layers. Electric transport measurement indicates that Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ behaves metallic. Thermal transport and Hall measurements show that the type of the carriers is hole-like and it may be a potential thermoelectric material at high temperatures. First principle calculations are in agreement with experimental results and show that Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ is a quasi-2D metal. Further theoretical investigation suggests the ground states of the Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ -type can be tuned by designing the blocking layers, which will enrich the physical properties of these compounds.

CuSe-based layered compound Bi2​YO4​Cu2​Se2​ as a quasi-two-dimensional metal

Abstract

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CuSe-based layered compound Bi $_{2}$ YO $_{4}$ Cu $_{2}$ Se $_{2}$ as a quasi-two-dimensional metal