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

VL - 249-251

SP - 864

EP - 867

JO - Physica B: Physics of Condensed Matter &amp; C: Atomic, Molecular and Plasma Physics, Optics

JF - Physica B: Physics of Condensed Matter &amp; C: Atomic, Molecular and Plasma Physics, Optics

SN - 0921-4526

ER -