Coulomb drag between disordered two-dimensional electron-gas layers
نویسندگان
چکیده
منابع مشابه
Coulomb drag between disordered two-dimensional electron-gas layers.
We derive and evaluate expressions for the frictional Coulomb drag between disordered two-dimensional electron gas layers. Our derivation is based on the memory-function formalism and the expression for the drag reduces to previously known results in the ballistic limit. We find that Coulomb drag is appreciably enhanced by disorder at low temperatures when the mean-free-path within a layer is c...
متن کاملSpin Coulomb drag in the two-dimensional electron liquid
We calculate the spin-drag transresistivity ρ↑↓(T ) in a two-dimensional electron gas at temperature T in the random phase approximation. In the lowtemperature regime we show that, at variance with the three-dimensional low-temperature result [ρ↑↓(T ) ∼ T 2], the spin transresistivity of a twodimensional spin unpolarized electron gas has the form ρ↑↓(T ) ∼ T 2 lnT . In the spin-polarized case t...
متن کاملCoulomb scattering lifetime of a two-dimensional electron gas.
Motivated by a recent tunneling experiment in a double quantum-well system, which reports an anomalously enhanced electronic scattering rate in a clean two-dimensional electron gas, we calculate the inelastic quasiparticle lifetime due to electron-electron interaction in a single loop dynamically screened Coulomb interaction within the random-phase-approximation. We obtain excellent quantitativ...
متن کاملInfrared phototransistor using capacitively coupled two-dimensional electron gas layers
A narrow-band infrared phototransistor s14.8 mmd is designed and realized based on a GaAs/AlGaAs double-layer structure. An isolated island formed from the first quantum well sQWd works as a gate, which is capacitively coupled to the remote two-dimensional electron gas s2DEGd layer working as the source/drain channel. Incident radiation excites the intersubband transition within the isolated QW...
متن کاملFinite width and local field corrections to spin coulomb drag in a quasi-two-dimensional electron gas.
We study the spin Coulomb drag in a quasi-two-dimensional electron gas of finite transverse width, including local field corrections beyond the random phase approximation (RPA). We find that the finite transverse width of the electron gas causes a significant reduction of the spin Coulomb drag. This reduction, however, is largely compensated by the enhancement coming from the inclusion of many-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1993
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.48.8203