Zobrazeno 1 - 10
of 222
pro vyhledávání: '"Cserti, J."'
We study theoretically the minimal conductivity of monolayer graphene in the presence of Rashba spin-orbit coupling. The Rashba spin-orbit interaction causes the low-energy bands to undergo trigonal-warping deformation and for energies smaller than t
Externí odkaz:
http://arxiv.org/abs/1507.00022
Publikováno v:
Phys. Rev. B 91, 125412 (2015)
Silicene systems, due to the buckled structure of the lattice, manifest remarkable intrinsic spin-orbit interaction triggering a topological phase transition in the low-energy regime. Thus, we found that protected edge states are present in silicene
Externí odkaz:
http://arxiv.org/abs/1412.6972
Publikováno v:
Phys. Rev. B 90, 125428 (2014)
An experimental method for detection of bound states around an antidot formed from a hole in a graphene sheet is proposed by measuring the ballistic two terminal conductances. In particularly, we consider the effect of bound states formed by magnetic
Externí odkaz:
http://arxiv.org/abs/1408.1517
Publikováno v:
Phys. Rev. B 86, 085456 (2012)
A line defect on a metallic surface induces standing waves in the electronic local density of states (LDOS). Asymptotically far from the defect, the wave number of the LDOS oscillations at the Fermi energy is usually equal to the distance between nes
Externí odkaz:
http://arxiv.org/abs/1111.6184
Publikováno v:
Phys. Rev. B 82, 134516 (2010)
We calculate the phase, the temperature and the junction length dependence of the supercurrent for ballistic graphene Josephson-junctions. For low temperatures we find non-sinusoidal dependence of the supercurrent on the superconductor phase differen
Externí odkaz:
http://arxiv.org/abs/1006.3228
Publikováno v:
Phys. Rev. B 81, 073103 (2010) [4 pages]
Results are presented for the electron current in gold chiral nanotubes (AuNTs). Starting from the band structure of (4,3) and (5,3) AuNTs, we find that the magnitude of the chiral currents are greater than those found in carbon nanotubes. We also ca
Externí odkaz:
http://arxiv.org/abs/1003.0619
Autor:
David, Gy., Cserti, J.
Publikováno v:
Phys. Rev. B 81, 121417(R) (2010)
We derive a general and simple expression for the time-dependence of the position operator of a multi-band Hamiltonian with arbitrary matrix elements depending only on the momentum of the quasi-particle. Our result shows that in such systems the Zitt
Externí odkaz:
http://arxiv.org/abs/0909.2004
Publikováno v:
Phys. Rev. B 80, 075416 (2009) [6 pages]
We present a theoretical study of electron wave functions in ballistic circular n-p junctions of bilayer graphene. Similarly to the case of a circular n-p junction of monolayer graphene, we find that (i) the wave functions form caustics inside the ci
Externí odkaz:
http://arxiv.org/abs/0905.3467
Publikováno v:
Phys. Rev. B 80, 073404 (2009) [4 pages]
We studied the energy levels of graphene based Andreev billiards consisting of a superconductor region on top of a monolayer graphene sheet. For the case of Andreev retro-reflection we show that the graphene based Andreev billiard can be mapped to th
Externí odkaz:
http://arxiv.org/abs/0902.2955
Autor:
Pályi, A., Cserti, J.
Publikováno v:
Phys. Rev. B 78, 241304(R) (2008)
We present a theoretical study of elastic spin-dependent electron scattering caused by a charged impurity in the vicinity of a two-dimensional electron gas. We find that the symmetry properties of the spin-dependent differential scattering cross sect
Externí odkaz:
http://arxiv.org/abs/0810.2892