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Study of ground state phases for spin-1/2 Falicov-Kimball model on a triangular lattice

Kumar, Sant and Yadav, Umesh K and Maitra, T and Singh, Ishwar (2014) Study of ground state phases for spin-1/2 Falicov-Kimball model on a triangular lattice. In: SOLID STATE COMMUNICATIONS, 189 . pp. 21-27.

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Official URL: http://dx.doi.org/10.1016/j.ssc.2014.03.014


The spin dependent Falicov-Kimball model (FKM) is studied on a triangular lattice using numerical diagonalization technique and Monte-Carlo simulation algorithm. Magnetic properties have been explored for different values of parameters: on-site Coulomb correlation U, exchange interaction J and filling of electrons. We have found that the ground state configurations exhibit long range Neel order, ferromagnetism or a mixture of both as J is varied. The magnetic moments of itinerant (d) and localized U) electrons are also studied. For the one-fourth filling case we found no magnetic moment from d- and f-electrons for U less than a critical value. `.2014 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords: A. Strongly correlated electron systems; C. Triangular lattice; D. Magnetic phase transitions; D. Exchange interactions
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 24 Jun 2014 05:13
Last Modified: 24 Jun 2014 05:13
URI: http://eprints.iisc.ac.in/id/eprint/49290

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