Piezoreflectance characterization of double‐barrier resonant tunneling structures

Piezoreflectance characterization of doubleftbarrier resonant tunneUng structures

The piezorefiectance technique has been used to optically characterize resonant tunneling structures that utilize isolated single quantum wells. The heavyand light-hole transitions associated with the quantum wells were prominent in the spectra of samples with barrier widths ranging from 50 to 34 A. Their spect.ral positions depended not only on quantum weB and barrier thicknesses, but also sig...

9 Resonant Tunneling in Quantum Structures

Simulation and Measurement of Shot Noise in Resonant Tunneling Structures

We present numerical simulations and measurements of shot noise in resonant tunneling structures. We show that when electron-electron interaction through Coulomb force and Pauli exclusion is properly taken into account, the main features of noise behavior of such devices can be correctly predicted. Electron-electron interaction is shown to be responsible for the suppression of shot noise in the...

Resonant tunneling and intrinsic bistability in twisted graphene structures

We predict that vertical transport in heterostructures formed by twisted graphene layers can exhibit a unique bistability mechanism. Intrinsically bistable I -V characteristics arise from resonant tunneling and interlayer charge coupling, enabling multiple stable states in the sequential tunneling regime. We consider a simple trilayer architecture, with the outer layers acting as the source and...

Tunneling and resonant conductance in one-dimensional molecular structures

We present a theory of tunneling and resonant transitions in one-dimensional molecular systems which is based on Green s function theory of electron sub-barrier scattering off the structural units (or functional groups) of a molecular chain. We show that the many-electron effects are of paramount importance in electron transport and they are effectively treated using a formalism of subbarrier s...