Navegação Ciências Exatas e da Terra por Assunto "Modelo de heisenberg"
Resultados 1-3 de 3
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Effect of band filling in the Kondo lattice : a mean-field approach
(1999) [Artigo de periódico]The usual Kondo lattice, including an antiferromagnetic exchange interaction between nearest-neighboring localized spins, is treated here in a mean-field scheme that introduces two mean-field parameters: one associated ... -
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals
(2002) [Artigo de periódico]We studied the electronic conductivity and magnetic properties of quasi-one-dimensional Ca₃Co₂O₆ single crystals. The results evidence a variable range hopping conductivity with temperature-induced crossover between ... -
Inverse transition in a two-dimensional dipolar frustrated ferromagnet
(2011) [Artigo de periódico]We show that the mean-field phase diagram of the dipolar frustrated ferromagnet in an external field presents an inverse transition in the field-temperature plane. The presence of this type of transition has recently been ...