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Zitterbewegung, chirality, and minimal conductivity in graphene
M. I. Katsnelson
It has been recently demonstrated experimentally that graphene, or single-layer carbon, is a gapless semiconductor with massless Dirac energy spectrum. A finite conductivity per ch…
Topological defects, pattern evolution, and hysteresis in thin magnetic films
P. A. Prudkovskii, A. N. Rubtsov, M. I. Katsnelson
Nature of the magnetic hysteresis for thin films is studied by the Monte-Carlo simulations. It is shown that a reconstruction of the magnetization pattern with external field occur…
Two-Dimensional Gas of Massless Dirac Fermions in Graphene
K. S. Novoselov, A. K. Geim, S. V. Morozov +5
Electronic properties of materials are commonly described by quasiparticles that behave as non-relativistic electrons with a finite mass and obey the Schroedinger equation. Here we…
Quantum entanglement dynamics and decoherence wave in spin chains at finite temperatures
S. D. Hamieh, M. I. Katsnelson
We analyze the quantum entanglement at the equilibrium in a class of exactly solvable one-dimensional spin models at finite temperatures and identify a region where the quantum flu…
Polar magneto-optical Kerr effect for low-symmetric ferromagnets
Helmut Rathgen, Mikhail I. Katsnelson, Olle Eriksson +1
The polar magneto-optical Kerr effect (MOKE) for low-symmetric ferromagnetic crystals is investigated theoretically based on first-principle calculations of optical conductivities…
Sum rules for X-ray magnetic circular dichroism spectra in strongly correlated ferromagnets
V. Yu. Irkhin, M. I. Katsnelson
It is proven that the sum rules for X-ray magnetic dichroism (XMCD) spectra that are used to separate spin and orbital contributions to the magnetic moment are formally correct for…