Scatterings and Quantum Effects in Heterostructures for High-Power and High-Frequency Electronics
- Univ. of South Carolina, Columbia, SC (United States)
- Benedict College, Columbia, SC (United States)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Charge transport in the wide-band-gap heterostructures with high carrier density approximately is investigated over a large range of temperature ( ) and magnetic field ( ). We observe the first evidence of weak localization in the two-dimensional electron gas in this system. From the Shubnikov–de Haas (SdH) oscillations a relatively light effective mass of is determined. Furthermore, the linear dependence with temperature ( ) of the inelastic scattering rate ( ) is attributed to the phase breaking by electron-electron scattering. Also in the same temperature range the less-than unit ratio of quantum lifetime to Hall transport time is taken to signify the dominance of small-angle scattering. Above 20 K, with increasing temperature scattering changes from acoustic phonon to optical phonon scattering, resulting in a rapid decrease in carrier mobility and increase in sheet resistance. Furthermore, suppression of such scatterings will lead to higher mobility and a way forward to high-power and high-frequency electronics.
- Research Organization:
- Florida A & M University, Tallahassee, FL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- Grant/Contract Number:
- NA0002630; DMR-1157490
- OSTI ID:
- 1540701
- Alternate ID(s):
- OSTI ID: 1419829
- Journal Information:
- Physical Review Applied, Vol. 9, Issue 2; ISSN 2331-7019
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Quantum transport properties of monolayer graphene with antidot lattice
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journal | August 2019 |
Planar anisotropic Shubnikov-de-Haas oscillations of two-dimensional electron gas in AlN/GaN heterostructure
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journal | October 2019 |
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