Kitaev interactions between j = 1/2 moments in honeycomb Na2IrO3 are large and ferromagnetic: insights from ab initio quantum chemistry calculations

Autor: Vamshi M Katukuri, S Nishimoto, V Yushankhai, A Stoyanova, H Kandpal, Sungkyun Choi, R Coldea, I Rousochatzakis, L Hozoi, Jeroen van den Brink

Publikováno v: New Journal of Physics, Vol 16, Iss 1, p 013056 (2014)

Na _2 IrO _3 , a honeycomb 5d ^5 oxide, has been recently identified as a potential realization of the Kitaev spin lattice. The basic feature of this spin model is that for each of the three metal–metal links emerging out of a metal site, the Kitae

Externí odkaz: https://doaj.org/article/f15fdfc6343a451b9fb444201bc3be22

Strongly frustrated triangular spin lattice emerging from triplet dimer formation in honeycomb Li2IrO3

Autor: Satoshi Nishimoto, Vamshi M. Katukuri, Viktor Yushankhai, Hermann Stoll, Ulrich K. Rößler, Liviu Hozoi, Ioannis Rousochatzakis, Jeroen van den Brink

Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)

Honeycomb iridates are candidates for the realization of a Kitaev spin liquid, displaying properties such as the protection of quantum information. Here, the authors investigate the phase diagram of honeycomb Li2IrO3, using quantum chemistry methods

Externí odkaz: https://doaj.org/article/943701a3d4d04f81bce690660388e63a

Charge ordering in Ir dimers in the ground state of Ba5AlIr2O11

Autor: Vamshi M. Katukuri, Xingye Lu, D. E. McNally, Marcus Dantz, Vladimir N. Strocov, M. Moretti Sala, M. H. Upton, J. Terzic, G. Cao, Oleg V. Yazyev, Thorsten Schmitt

Publikováno v: Physical Review B. 105

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d05fe51e1468d3698123ee0f603a5d27
https://doi.org/10.1103/physrevb.105.075114

Observation of heavy spin-orbit excitons propagating in a nonmagnetic background: The case of (Ba,Sr)2YIrO6

Autor: G. Aslan-Cansever, B. H. Kim, M. Moretti Sala, Mihai Sturza, J. E. Hamann-Borrero, N. A. Bogdanov, D. V. Efremov, J. van den Brink, Sabine Wurmehl, A. Maljuk, Michael Krisch, Bernd Büchner, Maximilian Kusch, J. Geck, Vamshi M. Katukuri, Liviu Hozoi, T. Dey

Publikováno v: Physical Review B. 97

We present a combined experimental and theoretical study of the elementary magnetic excitations in ${\mathrm{Ba}}_{2}{\mathrm{YIrO}}_{6}$ and ${\mathrm{Sr}}_{2}{\mathrm{YIrO}}_{6}$---the two most intensively discussed candidates for a new type of mag

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https://doi.org/10.1103/physrevb.97.064421

Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite

Autor: Dominik Legut, Andreas Mann, Andrzej M. Oleś, S. Borroni, Christopher Arrell, F. van Mourik, Krzysztof Parlinski, Fabrizio Carbone, Jérémie Teyssier, Edoardo Baldini, Oleg V. Yazyev, Andrzej Kozłowski, Vamshi M. Katukuri, Przemysław Piekarz, José Lorenzana

Publikováno v: Physical Review B 96 (2017): 104308-1–104308-12. doi:10.1103/PhysRevB.96.104308
info:cnr-pdr/source/autori:Borroni S.; Baldini E.; Katukuri V.M.; Mann A.; Parlinski K.; Legut D.; Arrell C.; Van Mourik F.; Teyssier J.; Kozlowski A.; Piekarz P.; Yazyev O.V.; Oles A.M.; Lorenzana J.; Carbone F./titolo:Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite/doi:10.1103%2FPhysRevB.96.104308/rivista:Physical Review B/anno:2017/pagina_da:104308-1/pagina_a:104308-12/intervallo_pagine:104308-1–104308-12/volume:96

Symmetry breaking across phase transitions often causes changes in selection rules and emergence of optical modes which can be detected via spectroscopic techniques or generated coherently in pump-probe experiments. In second-order or weakly first-or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ea44daab16e53eea62bf89722794f57
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