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Title: A new type of magnetoresistance oscillations: Interaction of a two-dimensional electron gas with leaky interface phonons

Abstract

The authors report a new type of oscillations in magnetoresistance observed in high-mobility two-dimensional electron gas (2DEG), in GaAs-AIGaAs heterostructures. Being periodic in 1/B these oscillations appear in weak magnetic field (B < 0.3 T) and only in a narrow temperature range (3 K < T < 7 K). Remarkably, these oscillations can be understood in terms of magneto-phonon resonance originating from the interaction of 2DEG and leaky interface-acoustic phonon modes. The existence of such modes on the GaAs:AIGaAs interface is demonstrated theoretically and their velocities are calculated. It is shown that the electron-phonon scattering matrix element exhibits a peak for the phonons carrying momentum q = 2k{sub F} (k{sub F} is the Fermi wave-vector of 2DEG).

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755602
Report Number(s):
SAND2000-1195J
TRN: AH200021%%353
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Other Information: Submitted to Physical Review Letters; PBD: 11 May 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNETORESISTANCE; HETEROJUNCTIONS; GALLIUM ARSENIDES; ALUMINIUM ARSENIDES; PHONONS; ELECTRON GAS; SHUBNIKOV-DE HAAS EFFECT

Citation Formats

ZUDOV,M.A., PONOMAREV,I.V., EFROS,A.L., DU,R.R., SIMMONS,JERRY A., and RENO,JOHN L. A new type of magnetoresistance oscillations: Interaction of a two-dimensional electron gas with leaky interface phonons. United States: N. p., 2000. Web.
ZUDOV,M.A., PONOMAREV,I.V., EFROS,A.L., DU,R.R., SIMMONS,JERRY A., & RENO,JOHN L. A new type of magnetoresistance oscillations: Interaction of a two-dimensional electron gas with leaky interface phonons. United States.
ZUDOV,M.A., PONOMAREV,I.V., EFROS,A.L., DU,R.R., SIMMONS,JERRY A., and RENO,JOHN L. Thu . "A new type of magnetoresistance oscillations: Interaction of a two-dimensional electron gas with leaky interface phonons". United States. https://www.osti.gov/servlets/purl/755602.
@article{osti_755602,
title = {A new type of magnetoresistance oscillations: Interaction of a two-dimensional electron gas with leaky interface phonons},
author = {ZUDOV,M.A. and PONOMAREV,I.V. and EFROS,A.L. and DU,R.R. and SIMMONS,JERRY A. and RENO,JOHN L.},
abstractNote = {The authors report a new type of oscillations in magnetoresistance observed in high-mobility two-dimensional electron gas (2DEG), in GaAs-AIGaAs heterostructures. Being periodic in 1/B these oscillations appear in weak magnetic field (B < 0.3 T) and only in a narrow temperature range (3 K < T < 7 K). Remarkably, these oscillations can be understood in terms of magneto-phonon resonance originating from the interaction of 2DEG and leaky interface-acoustic phonon modes. The existence of such modes on the GaAs:AIGaAs interface is demonstrated theoretically and their velocities are calculated. It is shown that the electron-phonon scattering matrix element exhibits a peak for the phonons carrying momentum q = 2k{sub F} (k{sub F} is the Fermi wave-vector of 2DEG).},
doi = {},
journal = {Physical Review Letters},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}