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Article
The effects of nonequilibrium charge distribution in scanning tunneling spectroscopy of semiconductors
Results are presented from a low-temperature scanning tunneling microscopy (STM) investigation of III-V semiconductor surfaces cleaved in situ along a (110) plane. The STM topographic images reveal the presence o...
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Article
Coulomb singularity effects in the tunneling spectroscopy of individual impurities
Nonequilibrium Coulomb effects in resonant tunneling through deep impurity states are analyzed. It is shown that Coulomb vertex corrections to the tunneling transfer amplitude lead to power law singularity in ...
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Article
Effects of electron-phonon interaction in tunneling processes in nanostructures
Tunneling through a system with two discrete electron levels coupled by electron-phonon interaction is considered. The interplay between elastic and inelastic tunneling channels is analyzed not only for weak e...
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Article
Identifying the electronic properties of the Ge(111)-(2×1) surface by low-temperature scanning tunneling microscopy
We present the results of our low-temperature scanning tunneling microscopy (STM) investigation of the clean Ge(111) surface. Our experiments enable, for the first time, STM observation of one-dimensional surf...
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Article
Tunneling current induced phonon generation in nanostructures
We analyze generation of phonons in tunneling structures with two electron states coupled by electron-phonon interaction. The conditions of strong vibration excitations are determined and the dependence of non...
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Article
Bias voltage dependent shift of the atomic-scale structure of a Ge(111)-(2 × 1) reconstructed surface measured by low temperature scanning tunneling microscopy
The results of low temperature scanning tunneling microscopy (STM) investigations of a clean Ge(111) surface are presented. Bias dependent shifts of the atomic-scale structure caused by the (2 × 1) reconstruct...
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Article
Correlation induced switching of the local spatial charge distribution in a two-level system
It was found that tunneling current through a nanometer scale structure with strongly coupled localized states causes spatial redistribution of localized charges induced by Coulomb correlations. We present her...
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Article
Nonadiabatic electron charge pum** in coupled semiconductor quantum dots
The possibility of nonadiabatic electron pum** in the system of three coupled quantum dots (QDs) attached to the leads is discussed. We have found out that periodical changing of energy level position in the...
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Article
Coulomb correlations effects on localized charge relaxation in the coupled quantum dots
We analyzed localized charge time evolution in the system of two interacting quantum dots (QD) (artificial molecule) coupled with the continuous spectrum states. We demonstrated that Coulomb interaction modifi...
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Article
Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
We investigated the peculiarities of non-equilibrium charge states and spin configurations in the system of two strongly coupled quantum dots (QDs) weakly connected to the electrodes in the presence of Coulomb...
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Article
Non-stationary effects in the coupled quantum dots influenced by the electron-phonon interaction
We analyzed time evolution of the localized charge in the system of two interacting single level quantum dots coupled with the continuous spectrum states in the presence of electron-phonon interaction. We demo...
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Article
On the density of states for the Hubbard model: Pseudo-particle Keldysh diagram method—an alternative to DMFT?
It is shown how to construct Keldysh diagram technique for pseudo-particle approach to the Hubbard model. We propose self-consistent equations for pseudo particle and electron Green’s functions in Keldysh diag...
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Article
External field induced switching of a tunneling current in coupled quantum dots
We investigated the tunneling current peculiarities in the system of two quantum dots that are coupled by means of the external field and are weakly connected to the electrodes in the presence of Coulomb corre...
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Article
Many-particle interaction in tunneling spectroscopy of Ge adatoms on the Ge(111) surface
We report on the direct observation by means of low temperature scanning tunneling microscopy and spectroscopy (STM/STS) of additional peculiarities in the local tunneling conductivity caused by the presence o...
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Article
Effect of coulomb correlations on the two-level quantum dot susceptibility and polarization
We revealed that the susceptibility and polarization of two-level quantum dot (QD) with Coulomb correlations between localized electrons weakly connected to the reservoirs are determined not only by the statio...
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Article
Diagnostics of many-particle electronic states: Non-stationary currents and residual charge dynamics
We propose the method for identifying many particle electronic states in the system of coupled quantum dots (impurities) with Coulomb correlations. We demonstrate that different electronic states can be distin...
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Article
Kinetics of a local “magnetic” moment and a non-stationary spin-polarized current in the single impurity Anderson model
We perform theoretical investigation of the localized state dynamics in the presence of interaction with the reservoir and Coulomb correlations. We analyze kinetic equations for electron occupation numbers wit...
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Article
Non-Stationary Spin-Polarized Currents Tuning in a Correlated Quantum Dot
We analyzed the influence of applied bias changing and external magnetic field switching on the non-stationary spin-polarized currents behavior in the correlated single-level quantum dot coupled to the non-mag...
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Article
Open AccessProbing and driving of spin and charge states in double quantum dot under the quench
We have analyzed theoretically quenched dynamics of correlated double quantum dot (DQD) due to the switching “on” and “off” coupling to reservoirs. The possibility for controllable manipulation of charge and s...
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Article
Open AccessCorrelated impurity complex in the asymmetric tunneling contact: an ideal system to observe negative tunneling conductivity
We studied theoretically electron transport through the impurity complex localized between the tunneling contact leads by means of the generalized Keldysh diagram technique. The formation of multiple well pron...
