Výsledky vyhledávání - "Sekania, Michael"

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$L$-hole Pockets of the Palladium Fermi Surface Revealed by Positron Annihilation Spectroscopy

Autor: Sekania, Michael, Östlin, Andreas, Appelt, Wilhelm H., Dugdale, S. B., Chioncel, Liviu

Using the combined Density Functional and Dynamical Mean Field theory we study relativistic corrections to the Fermi surface of palladium. We find indeed that relativistic corrections create a small hole pockets at the $L$-symmetry points. Furthermor

Externí odkaz: http://arxiv.org/abs/2110.13514

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Mass-Imbalanced Ionic Hubbard Chain

Autor: Sekania, Michael, Baeriswyl, Dionys, Jibuti, Luka, Japaridze, George I.

Publikováno v: Phys. Rev. B 96, 035116 (2017)

A repulsive Hubbard model with both spin-asymmetric hopping (${t_\uparrow\neq t_\downarrow}$) and a staggered potential (of strength $\Delta$) is studied in one dimension. The model is a compound of the mass-imbalanced (${t_\uparrow\neq t_\downarrow}

Externí odkaz: http://arxiv.org/abs/1704.07459

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Braiding errors in interacting Majorana quantum wires

Autor: Sekania, Michael, Plugge, Stephan, Greiter, Martin, Thomale, Ronny, Schmitteckert, Peter

Publikováno v: Phys. Rev. B 96, 094307 (2017)

Avenues of Majorana bound states (MBSs) have become one of the primary directions towards a possible realization of topological quantum computation. For a Y-junction of Kitaev quantum wires, we numerically investigate the braiding of MBSs while consi

Externí odkaz: http://arxiv.org/abs/1703.03360

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Magnetic instability of the orbital-selective Mott phase

Autor: Greger, Markus, Sekania, Michael, Kollar, Marcus

We characterize the low-energy physics of the two-orbital Hubbard model in the orbital-selective Mott phase, in which one band is metallic and the other insulating. Using dynamical mean-field theory with the numerical renormalization group at zero te

Externí odkaz: http://arxiv.org/abs/1312.0100

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Insulating behavior with spin and charge order in the ionic Hubbard model

Autor: Byczuk, Krzysztof, Sekania, Michael, Hofstetter, Walter, Kampf, Arno P.

Publikováno v: Phys. Rev. B 79, 121103(R) (2009)

Paramagnetic solutions of the ionic Hubbard model at half-filling in dimensions $D>2$ indicate that the band and the Mott insulator phases are separated by a metallic phase. We present zero-temperature dynamical mean-field theory solutions, which inc

Externí odkaz: http://arxiv.org/abs/0902.1076

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