TY - JOUR
T1 - Frictional drag mediated by acoustic phonons
AU - Bønsager, M. C.
AU - Flensberg, K.
AU - Hu, B. Y.K.
AU - MacDonald, A. H.
PY - 1998/6/17
Y1 - 1998/6/17
N2 - We study phonon-mediated frictional drag between two two-dimensional electron gases. We find two different regimes depending on whether the phonon mean free path ℓph is larger or smaller than a characteristic value ℓph, crit. For ℓph > ℓph, crit, the drag is dominated by coupling through an electron-phonon collective mode, whereas for ℓph < ℓph, crit, the drag is mediated by damped phonons. In the latter case, the drag varies logarithmically with interlayer distance. ℓph, crit depends on the electron densities, and it is therefore possible to experimentally tune a given system between the two regimes.
AB - We study phonon-mediated frictional drag between two two-dimensional electron gases. We find two different regimes depending on whether the phonon mean free path ℓph is larger or smaller than a characteristic value ℓph, crit. For ℓph > ℓph, crit, the drag is dominated by coupling through an electron-phonon collective mode, whereas for ℓph < ℓph, crit, the drag is mediated by damped phonons. In the latter case, the drag varies logarithmically with interlayer distance. ℓph, crit depends on the electron densities, and it is therefore possible to experimentally tune a given system between the two regimes.
KW - Double-layer electron systems
KW - Frictional drag
KW - Phonon-mediated interaction
UR - http://www.scopus.com/inward/record.url?scp=0032093941&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(98)00332-9
DO - 10.1016/S0921-4526(98)00332-9
M3 - Journal article
AN - SCOPUS:0032093941
SN - 0921-4526
VL - 249-251
SP - 864
EP - 867
JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
ER -