Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Zawadzki, Wlodek"'
Autor:
Rusin, Tomasz M., Zawadzki, Wlodek
Publikováno v:
Phys. Rev. A 103, 052221 (2021)
The Pauli Exclusion Operator (PEO) which ensures proper symmetry of the eigenstates of multi-electron systems with respect to exchange of each pair of electrons is introduced. Once PEO is added to the Hamiltonian, no additional constraints on multi-e
Externí odkaz:
http://arxiv.org/abs/2101.03445
Autor:
Rusin, Tomasz M., Zawadzki, Wlodek
Publikováno v:
Phys. Rev. B 101, 205201 (2020)
The Green's function~(GF) of two localized magnetic moments embedded in the electron gas is calculated exactly. The electrons are treated in the effective mass approximation and the magnetic moments are coupled with electrons by a delta-like~$s-d$ in
Externí odkaz:
http://arxiv.org/abs/2001.09813
Autor:
Zawadzki, Wlodek, Pfeffer, Pawel
Reflection and transmission of electrons scattered by a rectangular potential step in the presence of an external magnetic field parallel to the electron beam is described with the use of the Dirac equation. It is shown that in addition to the known
Externí odkaz:
http://arxiv.org/abs/1912.07111
Autor:
Zawadzki, Wlodek
Relations between particle and wave properties for charge carriers in periodic potentials of crystalline metals and semiconductors are derived. The particle aspects of electrons and holes in periodic potentials are considered using properties of quas
Externí odkaz:
http://arxiv.org/abs/1903.07124
Autor:
Rusin, Tomasz M., Zawadzki, Wlodek
Publikováno v:
Phys. Rev. B 97, 205410 (2018)
Friedel oscillations (FO) of electron density caused by a delta-like neutral impurity in two-dimensional (2D) systems in a magnetic field are calculated. Three 2D cases are considered: free electron gas, monolayer graphene and group-VI dichalcogenide
Externí odkaz:
http://arxiv.org/abs/1802.03585
Autor:
Zawadzki, Wlodek
Analogy between behavior of electrons in narrow-gap semiconductors (NGS) and relativistic electrons is reviewed. Energy bands in NGS correspond to special relativity, the latter is analogous to two-band k.p description for NGS. Maximum electron veloc
Externí odkaz:
http://arxiv.org/abs/1701.07067
Autor:
Rusin, Tomasz M., Zawadzki, Wlodek
The effect of strong singularity in the calculation of range function for the RKKY interaction in 1D electron gas is discussed. The method of handling this singularity is presented. A possible way of avoiding the singularity in the Ruderman-Kittel pe
Externí odkaz:
http://arxiv.org/abs/1701.06198
Autor:
Rusin, Tomasz M, Zawadzki, Wlodek
Closed expression for the Green's function of the stationary two-dimensional Schrodinger equation for an electron in group-VI dichalcogenides in the presence of a magnetic field is obtained in terms of the Whittaker functions. The resulting Green's f
Externí odkaz:
http://arxiv.org/abs/1612.03944
Publikováno v:
Semicond. Sci. Technol. 31 053001 (2016)
We review magneto-optical and magneto-transport effects in GaAs/GaAlAs heterostructures doped in GaAlAs barriers with donors, providing two-dimensional electron gas in GaAs quantum wells, and additionally doped with smaller amounts of acceptors (most
Externí odkaz:
http://arxiv.org/abs/1604.07082
Autor:
Rusin, Tomasz M., Zawadzki, Wlodek
Publikováno v:
Semicond. Sci. Technol. {\bf 29}, 125010 (2014)
The phenomenon of Zitterbewegung (ZB, trembling motion) of electrons is described in zigzag carbon nanotubes (CNT) excited by laser pulses. The tight binding approach is used for the band structure of CNT and the effect of light is introduced by the
Externí odkaz:
http://arxiv.org/abs/1404.6187