Ab initio electron mobility and polar phonon scattering in GaAs
Journal Article
·
· Physical Review B
- California Institute of Technology (CalTech), Pasadena, CA (United States); DOE/OSTI
- California Institute of Technology (CalTech), Pasadena, CA (United States)
In polar semiconductors and oxides, the long-range nature of the electron-phonon (e- ph) interaction is a bottleneck to compute charge transport from first principles. In this work, we develop an efficient ab initio scheme to compute and converge the e- ph relaxation times (RTs) and electron mobility in polar materials. We apply our approach to GaAs, where by using the Boltzmann equation with state-dependent RTs, we compute mobilities in excellent agreement with experiment at 250 – 500 K . The e- ph RTs and the phonon contributions to intravalley and intervalley e- ph scattering are also analyzed. Our work enables efficient ab initio computations of transport and carrier dynamics in polar materials.
- Research Organization:
- California Inst. of Technology (CalTech), Pasadena, CA (United States); Univ. of California, Oakland, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; SC0004993
- OSTI ID:
- 1535797
- Alternate ID(s):
- OSTI ID: 1333582
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 20 Vol. 94; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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