منابع مشابه
Adiabatic Quantum Pumping of Coherent Electrons
We review recent theoretical calculations of charge transfer through mesoscopic devices in response to slowly-oscillating, spatially-confined, potentials. The discussion is restricted to non-interacting electrons, and emphasizes the role of quantum interference and resonant transmission in producing almost integer values (in units of the electronic charge e) of the charge transmitted per cycle,...
متن کاملCoulomb drag for strongly localized electrons: a pumping mechanism.
The mutual influence of two layers with strongly localized electrons is exercised though the random Coulomb shifts of site energies in one layer caused by electron hops in the other layer. We trace how these shifts give rise to a voltage drop in the passive layer, when a current is passed through the active layer. We find that the microscopic origin of drag lies in the time correlations of the ...
متن کاملPumping electrons in graphene to the M point in the Brillouin zone: Emergence of anisotropic plasmons
We consider the existence of plasmons in a nonequilibrium situation where electrons from the valence band of graphene are pumped to states in the Brillouin zone around the M point by a high intensity UV electromagnetic field. The resulting out-of-equilibrium electron gas is later probed by a weak electromagnetic field of different frequency. We show that the optical properties of the system and...
متن کاملOptical Pumping and Photoluminescence Detection of Spin-polarized Electrons in Uniaxially Stressed Gallium Arsenide*
This work describes the development and application of an optical pumping and photoluminescence experiment for electron spin polarization measurements on semiconductor photocathode materials. We discuss the spin polarization increase that is produced by applying a uniaxial compression to a gallium arsenide crystal and selectively optically pumping the transition between the upper strain-split v...
متن کاملThree-waveform bidirectional pumping of single electrons with a silicon quantum dot
Semiconductor-based quantum dot single-electron pumps are currently the most promising candidates for the direct realization of the emerging quantum standard of the ampere in the International System of Units. Here, we discuss a silicon quantum dot single-electron pump with radio frequency control over the transparencies of entrance and exit barriers as well as the dot potential. We show that o...
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: New Journal of Physics
سال: 2009
ISSN: 1367-2630
DOI: 10.1088/1367-2630/11/11/113057