Synthesis, structure, and properties of the electron-poor II-V semiconductor ZnAs.
Synthesis, structure, and properties of the electron-poor II-V semiconductor ZnAs.
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贫电子II-V族半导体ZnAs的合成、结构和性能
DOI:
10.1021/ic501308q
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发表时间:
2014
影响因子:
4.6
通讯作者:
U. Häussermann
中科院分区:
文献类型:
--
作者:
A. Fischer;D. Eklöf;D. E. Benson;E.-W. Scheidt;W. Scherer;U. Häussermann
ZnAs was synthesized at 6 GPa and 1273 K utilizing multianvil high-pressure techniques and structurally characterized by single-crystal and powder X-ray diffraction (space groupPbca(No. 61),a= 5.6768(2) Å,b= 7.2796(2) Å,c= 7.5593(2) Å,Z= 8). The compound is isostructural to ZnSb (CdSb type) and displays multicenter bonded rhomboid rings Zn2As2, which are connected to each other by classical two-center, two-electron bonds. At ambient pressure ZnAs is metastable with respect to Zn3As2and ZnAs2. When heating at a rate of 10 K/min decomposition takes place at ∼700 K. Diffuse reflectance measurements reveal a band gap of 0.9 eV. Electrical resistivity, thermopower, and thermal conductivity were measured in the temperature range of 2–400 K and compared to thermoelectric ZnSb. The room temperature values of the resistivity and thermopower are ∼1 Ω cm and +27 μV/K, respectively. These values are considerably higher and lower, respectively, compared to ZnSb. Above 150 K the thermal conductivity attains low values, around 2 W/m·K, which is similar to that of ZnSb. The heat capacity of ZnAs was measured between 2 and 300 K and partitioned into a Debye and two Einstein contributions with temperatures of θD= 234 K, θE1= 95 K, and θE2= 353 K. Heat capacity and thermal conductivity of ZnSb and ZnAs show very similar features, which possibly relates to their common electron-poor bonding properties.
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影响因子:
3.2
作者:
D. M. Trichês;S. M. Souza;J. C. Lima;T. A. Grandi;C. Campos;A. Polian;J. Itié;F. Baudelet;J. Chervin
通讯作者:
D. M. Trichês;S. M. Souza;J. C. Lima;T. A. Grandi;C. Campos;A. Polian;J. Itié;F. Baudelet;J. Chervin
影响因子:
2
作者:
E. Stoyanov;U. Häussermann;K. Leinenweber
通讯作者:
K. Leinenweber
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
D. Houde;J. Lefaivre;S. Jandl;E. Arushanov
通讯作者:
E. Arushanov
DOI:
--
发表时间:
1961
期刊:
影响因子:
--
作者:
W. Turner;A. Fischler;W. E. Reese
通讯作者:
W. E. Reese
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
B. Morosin;J. Schirber
通讯作者:
J. Schirber