Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Aroyo, M. I."'
We consider the extent to which symmetry eigenvalues reveal the topological character of bands. Specifically, we compare distinct atomic limit phases (band representations) that share the same irreducible representations (irreps) at all points in the
Externí odkaz:
http://arxiv.org/abs/2107.00647
Autor:
Chattopadhyay, S., Simonet, V., Skumryev, V., Mukhin, A. A., Ivanov, V. Yu., Aroyo, M. I., Dimitrov, D. Z., Gospodinov, M., Ressouche, E.
We report single-crystal neutron diffraction study of the magnetic structure of the multiferroic compound YbMnO$_3$, a member of the hexagonal manganite family, in zero-field and under a magnetic field applied along the $c$-axis. We propose a scenari
Externí odkaz:
http://arxiv.org/abs/1809.09370
Autor:
Cano, Jennifer, Bradlyn, Barry, Wang, Zhijun, Elcoro, L., Vergniory, M. G., Felser, C., Aroyo, M. I., Bernevig, B. Andrei
Publikováno v:
Phys. Rev. Lett. 120, 266401 (2018)
Elementary band representations are the fundamental building blocks of atomic limit band structures. They have the defining property that at partial filling they cannot be both gapped and trivial. Here, we give two examples -- one each in a symmorphi
Externí odkaz:
http://arxiv.org/abs/1711.11045
Autor:
Bradlyn, Barry, Elcoro, L., Vergniory, M. G., Cano, Jennifer, Wang, Zhijun, Felser, C., Aroyo, M. I., Bernevig, B. A.
Publikováno v:
Phys. Rev. B 97, 035138 (2018)
The conventional theory of solids is well suited to describing band structures locally near isolated points in momentum space, but struggles to capture the full, global picture necessary for understanding topological phenomena. In part of a recent pa
Externí odkaz:
http://arxiv.org/abs/1709.01937
Autor:
Cano, Jennifer, Bradlyn, Barry, Wang, Zhijun, Elcoro, L., Vergniory, M. G., Felser, C., Aroyo, M. I., Bernevig, B. Andrei
Publikováno v:
Phys. Rev. B 97, 035139 (2018)
The link between chemical orbitals described by local degrees of freedom and band theory, which is defined in momentum space, was proposed by Zak several decades ago for spinless systems with and without time-reversal in his theory of "elementary" ba
Externí odkaz:
http://arxiv.org/abs/1709.01935
Autor:
Vergniory, M. G., Elcoro, L., Wang, Zhijun, Cano, Jennifer, Felser, C., Aroyo, M. I., Bernevig, B. Andrei, Bradlyn, Barry
Publikováno v:
Phys. Rev. E 96, 023310 (2017)
Topological phases of noninteracting particles are distinguished by global properties of their band structure and eigenfunctions in momentum space. On the other hand, group theory as conventionally applied to solid-state physics focuses only on prope
Externí odkaz:
http://arxiv.org/abs/1706.08529
Autor:
Bradlyn, Barry, Elcoro, L., Cano, Jennifer, Vergniory, M. G., Wang, Zhijun, Felser, C., Aroyo, M. I., Bernevig, B. Andrei
Publikováno v:
Nature 547, 298--305 (2017)
The past decade's apparent success in predicting and experimentally discovering distinct classes of topological insulators (TIs) and semimetals masks a fundamental shortcoming: out of 200,000 stoichiometric compounds extant in material databases, onl
Externí odkaz:
http://arxiv.org/abs/1703.02050
Although superspace formalism has become the standard approach for the analysis of structurally modulated crystals, it has remained during the last thirty years almost unexplored as a practical tool to deal with magnetic incommensurate structures. Th
Externí odkaz:
http://arxiv.org/abs/1107.2358
Publikováno v:
Phys. Rev. B 82, 024104 (2010)
The Raman spectra of single crystals of NiFe2O4 were studied in various scattering configurations in close comparison with the corresponding spectra of Ni0.7Zn0.3Fe2O4 and Fe3O4. The number of experimentally observed Raman modes exceeds significantly
Externí odkaz:
http://arxiv.org/abs/1005.2244
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