Coherent and sequential photoassisted tunneling through a semiconductor double-barrier structure
نویسندگان
چکیده
منابع مشابه
Coherent and sequential photoassisted tunneling through a semiconductor double-barrier structure.
We have studied the problem of coherent and sequential tunneling through a double barrier structure, assisted by light considered to be present All over the structure, i,e emitter, well and collector as in the experimental evidence. By means of a canonical transformation and in the framework of the time dependent perturbation theory, we have calculated the transmission coefficient and the elect...
متن کاملCoherent-electron intrinsic multistability in a double-barrier tunneling diode
Recently, a new mechanism leading to electrical multistability in coherent-electron tunneling devices was proposed. The reflection of coherent electrons at a barrier leads to the formation of resonant states in a quantum well in front of the barrier, and the resulting strongly modulated local density of states allows for multiple stable solutions of the Poisson equation to exist at fixed bias. ...
متن کاملSequential tunneling current through semiconductor superlattices under intense THz radiation
Recent transport measurements in GaAs–GaAlAs superlattices under THz radiation show evidence of dynamical localization and electron pumping in the opposite direction to the dc bias in the linear response regime. The ac field induces absorption and emission processes in the multiwell structure which assist the tunnel and which are reflected as new features in the current density. A calculation w...
متن کاملElectron-tunneling dynamics through a double-barrier structure in the presence of phonons.
Electron-tunneling dynamics through a semiconductor double-barrier structure in the presence of plane-wave phonons is investigated by directly solving the time-dependent Schrodinger equation. The temporal profile of tunneling current density due to an electron wave packet incident at the resonant energy channel E„ is calculated at different lattice temperatures. The magnitude of the tunneling c...
متن کاملMagnetotunneling through a Semiconductor Double Barrier Structure Assisted by Light. Typeset Using Revt E X 1
We have analyzed theoretically the effect of a laser on the tunneling current through a double barrier in the presence of a parallel magnetic field. The magnetotunneling current is modified by the light due to the photon emission and absorption processes which assist the tunneling of electrons through the structure. We observe that the effect of the light can be controlled by tuning the ratio b...
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: 1994
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.50.4581