Scanning-gate-induced effects in nonlinear transport through nanostructures
نویسندگان
چکیده
We investigate the effect of a scanning gate tip on the nonlinear quantum transport properties of nanostructures. Generally, we predict that the symmetry of the current-voltage characteristic in reflection-symmetric samples is broken by a tip-induced rectifying conductance correction. Moreover, in the case of a quantum point contact (QPC), the tip-induced rectification term becomes dominant as compared to the change of the linear conductance at large tip-QPC distances. Calculations for a weak tip probing a QPC modeled by an abrupt constriction show that these effects are experimentally observable.
منابع مشابه
Numerical Modeling of a Fredkin gate using photonic-crystal-based nonlinear effects around the 1550 nm telecommunication wavelength
In this paper, a Fredkin gate using photonic-crystal around the 1550 nm telecommunication wavelength is modelled. The proposed structure has a compact footprint compared with previous works of research groups. The proposed structure is based on air holes on silicon substrate. Silicon substrate and air holes have 466 nm and 177 nm radius, respectively. For analyse of the structure Finite-Differe...
متن کاملA Theoretical Study of Nonlinear Optical Features of Alumina Nanostructures with the Groups III and VI Dopants
A comprehensive study on the structural, electronic and nonlinear optical (NLO) properties of alumina nanostructures (Al2O3)n with n = 2-5 belonging to the groups III and VI dopants carried out by density functional theory. The NBO charges exhibit dopant atoms caused to the increasing charge transfer and introduces acceptor-donor model for NLO response of alumin...
متن کاملMonte Carlo Simulation of Radiation effects in protection layers of logical cell of the digital gate in the FPGA for electron and proton rays Using the FLUKA Code
In this paper, radiation effects in protection layers of logical cell of the digital gate in the FPGA for electron and proton rays was simulated Using the FLUKA Code. by using of the Monte Carlo simulation, the electron and proton transport into the logical cell of the digital gate in the FPGA will be studied. In this simulation, the maximum energy of the electrons and protons at the entrance o...
متن کاملDynamical symmetries and quantum transport through nanostructures
We discuss the manifestation of dynamical symmetries in quantum transport through nanostructures. The dynamical symmetry SO(4) manifested in the singlet-triplet excitations is shown to be responsible for several exotic effects in nano-devices: non-equilibrium Kondo effect in T-shape Double Quantum Dots, phonon-induced Kondo effect in transition-metal-organic complexes, Kondo shuttling in Nano-E...
متن کاملGrowth and anisotropic transport properties of self-assembled InAs nanostructures in InP
Self-assembled InAs nanostructures in InP, comprising quantum wells, quantum wires, and quantum dots, are studied in terms of their formation and properties. In particular, the structural, optical, and anisotropic transport properties of the nanostructures are investigated. The focus is a comprehending exploration of the anisotropic in-plane transport in large ensembles of laterally coupled InA...
متن کامل