Computationally Guided Discovery of Axis-Dependent Conduction Polarity in NaSnAs Crystals
Computationally Guided Discovery of Axis-Dependent Conduction Polarity in NaSnAs Crystals
复制标题
计算引导发现 NaSnAs 晶体中轴相关的传导极性
DOI:
10.1021/acs.chemmater.0c04030
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发表时间:
2021
影响因子:
8.6
通讯作者:
Toberer, Eric S.
中科院分区:
文献类型:
--
作者:
Ochs, Andrew M.;Gorai, Prashun;Wang, Yaxian;Scudder, Michael R.;Koster, Karl;Moore, Curtis E.;Stevanovic, Vladan;Heremans, Joseph P.;Windl, Wolfgang;Toberer, Eric S.
Most electronic materials exhibit a single dominant charge carrier type, either holes or electrons, along all crystallographic directions. However, there are a small number of compounds, mostly metals, that exhibit simultaneous p-type and n-type conduction behavior along different crystallographic directions. We demonstrate that the experimental discovery of semiconductors with this axis-dependent conduction polarity can be facilitated by identifying a large anisotropy of either the electron or hole effective masses (m*) or both, providing the electron and hole masses dominate along different crystallographic directions. We calculated the layered semiconductor NaSnAs to have a lower electronm* in-plane than the cross-plane and a very large holem* in-plane and small holem* cross-plane. We established the growth of >3 mm-sized NaSnAs crystals via Sn flux and confirmed the band gap to be 0.65 eV, in agreement with theory. NaSnAs exhibits p-type thermopowers cross-plane and n-type thermopowers in-plane, confirming that the large anisotropy in the effective mass at the band edges is an excellent indicator for axis-dependent conduction polarity. Overall, this work shows that the discovery of semiconductors with such a phenomenon can be accelerated by computationally evaluating the anisotropic curvatures of the band edges, paving the way for their future discovery and application.
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DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
Robert G. Long;M. C. Bost;J. Mahan
通讯作者:
J. Mahan
DOI:
--
发表时间:
1995
期刊:
影响因子:
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作者:
T. Tan;J. Veuillen;P. Muret;S. Kennou;A. Siokou;S. Ladas;F. Razafindramisa;M. Brunel
通讯作者:
M. Brunel
影响因子:
3.3
作者:
Gorai, Prashun;Gao, Duanfeng;Toberer, Eric S.
通讯作者:
Toberer, Eric S.
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
I. Ali;P. Muret;T. Tan
通讯作者:
T. Tan
影响因子:
4.6
作者:
Fan Z;Liang QF;Chen YB;Yao SH;Zhou J
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Zhou J