Electronic structure, transport, and phonons of SrAgChF (Ch = S, Se, Te): Bulk superlattice thermoelectrics

被引：40

作者：

Gudelli, Vijay Kumar ^{[1
]}

Kanchana, V. ^{[1
]}

机构：

[1] Indian Inst Technol Hyderabad, Dept Phys, Ordnance Factory Estate, Yeddumailaram 502205, Telangana, India

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 04期

关键词：

PERFORMANCE; FIGURE; SCATTERING; MERIT; POWER; BA;

D O I：

10.1103/PhysRevB.92.045206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report calculations of the electronic structure, vibrational properties, and transport for the p-type semiconductors, SrAgChF (Ch = S, Se, and Te). We find soft phonons with low frequency optical branches intersecting the acoustic modes below 50 cm(-1), indicative of a material with low thermal conductivity. The bands at and near the valence-band maxima are highly two-dimensional, which leads to high thermopowers even at high carrier concentrations, which is a combination that suggests good thermoelectric performance. These materials may be regarded as bulk realizations of superlattice thermoelectrics.

引用

页数：8

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