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The Effective Spin Hamiltonian and Phase Separation Instability of the Almost Half-Filled Hubbard Model and Narrow-Band {\it S-f} Model
M. I. Auslender, M. I. Katsnelson
The effective spin Hamiltonian is constructed in the framework of the almost half-filled Hubbard model on the Cayley tree by means of functional integral technique with the use of…
First-principles studies of water adsorption on graphene: The role of the substrate
Tim O. Wehling, Mikhail I. Katsnelson, Alexander I. Lichtenstein
We investigate the electronic properties of graphene upon water adsorption and study the influence of the SiO2 substrate in this context using density functional calculations. Perf…
Optical properties of graphene: the Fermi liquid approach
M. I. Katsnelson
Optical properties of two-dimensional massless Dirac fermions are considered by the formalism of pseudospin precession equations which provides an easy and natural semiphenomenolog…
Modeling of graphite oxide
Danil W. Boukhvalov, Mikhail I. Katsnelson
Based on density functional calculations, optimized structures of graphite oxide are found for various coverage by oxygen and hydroxyl groups, as well as their ratio corresponding…
Decoherence by a spin thermal bath: Role of the spin-spin interactions and initial state of the bath
Shengjun Yuan, Mikhail I. Katsnelson, Hans De Raedt
We study the decoherence of two coupled spins that interact with a spin-bath environment. It is shown that the connectivity and the coupling strength between the spins in the envir…
Zero-energy states in corrugated bilayer graphene
M. I. Katsnelson, M. F. Prokhorova
Anomalous quantum Hall effects in single-layer and bilayer graphene are related with nontrivial topological properties of electron states (Berry phases and 2, respectively).…