Electronic Structure Calculations of Magnetic Exchange Interactions in Europium Monochalcogenides

Details Electronic Structure Calculations of Magnetic Exchange Interactions in Europium Monochalcogenides Electronic Structure Calculations of Magnetic Exchange Interactions in Europium Monochalcogenides

2010-03-10

arxiv.org/abs/1003.2039v1

Phys. Rev. B 83, 205201 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

Using a combination of local spin density and Hubbard 1 approximations we study the mechansim of exchange interacion in EuX (X=O, S, Se and Te). We reproduce known experimental results about bulk modulus, critical pressure for structural phase transition, magnetic ordering temperature, spin--wave dispersions as well as momentum-- and tempearuture--dependent band shift. Our numerical results show pressure induced competition between the hybirization enhanced exchange interaction and Kondo--like coupling in EuO. Possible ways to enhance T_{c} are discussed.

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