Classical and quantum conductivity in β-Ga2O3
Classical and quantum conductivity in β-Ga2O3
复制标题
β-Ga2O3 的经典电导率和量子电导率
DOI:
10.1038/s41598-018-38419-0
复制
发表时间:
2019
影响因子:
4.6
通讯作者:
Leedy, Kevin D.
中科院分区:
文献类型:
--
作者:
Look, David C.;Leedy, Kevin D.
The conductivity σ, quantum-based magnetoconductivity Δσ = σ(B) − σ(0), and Hall coefficient RH(= µH/σ) of degenerate, homoepitaxial, (010) Si-doped β-Ga2O3, have been measured over a temperature range T = 9–320 K and magnetic field range B = 0–10 kG. With ten atoms in the unit cell, the normal-mode phonon structure of β-Ga2O3is very complex, with optical-phonon energies ranging from kTpo~ 20–100 meV. For heavily doped samples, the phonon spectrum is further modified by doping disorder. We explore the possibility of developing a single function Tpo(T) that can be incorporated into both quantum and classical scattering theory such that Δσ vs B, Δσ vs T, and µHvs T are all well fitted. Surprisingly, a relatively simple function, Tpo(T) = 1.6 × 103{1 − exp[−(T + 1)/170]} K, works well for β-Ga2O3without any additional fitting parameters. In contrast, Δσ vs T in degenerate ScN, which has only one optical phonon branch, is well fitted with aconstantTpo= 550 K. These results indicate that quantum conductivity enables an understanding of classical conductivity in disordered, multi-phonon semiconductors.
登录
查看更多内容
影响因子:
--
作者:
CALLEN, HB
通讯作者:
CALLEN, HB
影响因子:
1.3
作者:
D. Look;Buguo Wang;K. Leedy
通讯作者:
K. Leedy
影响因子:
4
作者:
Sturm, C.;Schmidt-Grund, R.;Grundmann, M.
通讯作者:
Grundmann, M.
影响因子:
4
作者:
Krishnendu Ghosh;U. Singisetti
通讯作者:
U. Singisetti