Search Results - "Troper, A"

A planar model for the muon-catalyzed fusion by Caruso, F., Oguri, V., Silveira, F., Troper, A.

“…The basic principle of muon catalyzed fusion is that it is possible to obtain energy with temperatures much lower than that required for thermal nuclear…”
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A new cooling process driven by charge transfer mechanism: Application to YbInCu4 by de Oliveira, N.A., Troper, A.

“…In this work, we theoretically discuss the entropy change and the barocaloric effect in YbInCu4, which undergoes at ambient pressure a valence transition…”
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Temperature dependence and intermediate valence on magnetic hyperfine field at a Ce impurity diluted in RZn by Troper, A., de Oliveira, A.L., de Oliveira, N.A., Chaves, C.M.

“…In this work, we theoretically study the influence, at finite temperature, of the intermediate valence on the local moment formation and the magnetic hyperfine…”
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On the local magnetic moment formation and on the magnetic hyperfine field at isoelectronic noble impurities (Cu, Ag, Au) diluted in GdZn: Period effect by de Oliveira, A.L., Chaves, C.M., de Oliveira, N.A., Troper, A.

“…In this work we study the period effect on the local magnetic moment and the related magnetic hyperfine field at non-magnetic s-p impurities (Cu, Ag, Au)…”
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Ferromagnetism in two band metals: The very strong coupling limit by Chaves, C.M., Calegari, E.J., Magalhães, S.G., Troper, A.

“…The main purpose of this paper is to examine the occurrence of ferromagnetism in metals at the very strong coupling regime (U→∞) in the single-site…”
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Specific heat of a non-local attractive Hubbard model by Calegari, E.J., Lobo, C.O., Magalhaes, S.G., Chaves, C.M., Troper, A.

“…The specific heat C(T) of an attractive (interaction G<0) non-local Hubbard model is investigated within a two-pole approximation that leads to a set of…”
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Ferromagnetism in two band metals: Combined effect of Coulomb correlation, hybridization and band widths by Chaves, C.M., Troper, A.

“…We study the possibility of ferromagnetism in metals. The metal is described by two hybridized bands one of which includes Hubbard correlation whereas the…”
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Magnetocaloric and barocaloric effects in Mn ( As 0.7 Sb 0.3 ) by de Medeiros, L.G., de Oliveira, N.A., Troper, A.

“…In this paper we theoretically study the magnetocaloric effect and the barocaloric effect in the compound Mn ( As 0.7 Sb 0.3 ) . We calculate the…”
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Superconductivity in a correlated two-dimensional Hubbard model: A theoretical study by Caixeiro, E.S., Troper, A.

“…In this work we study the superconductivity within an attractive two-dimensional one-band Hubbard model. We consider a d-wave superconducting gap and a…”
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Superconductivity and hybridization in a two-dimensional extended Hubbard model: Strong coupling regime by Caixeiro, E.S., Troper, A.

“…In this work we study the effect of hybridization on the superconductivity within an attractive two-band Hubbard model. We describe the interband effects…”
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Local magnetic moment formation and magnetic hyperfine fields at Cd impurity in RAl2 (R = rare earth metal) by de Oliveira, A. L., de Oliveira, N. A., Chaves, C. M., Troper, A.

“…A model to calculate self-consistently the local magnetic moment and the magnetic hyperfine field B hf at the nuclei of 119Cd in RAl2 (R = rare earth metal),…”
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Monte Carlo calculations of the magnetocaloric effect in gadolinium by Nobrega, E.P., de Oliveira, N.A., von Ranke, P.J., Troper, A.

“…In this work we discuss the magnetocaloric effect in metallic gadolinium. We use a model Hamiltonian of interacting 4f spins and treat the 4f spin–spin…”
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Magnetic hyperfine field at s–p impurities on Laves phase compounds by Chaves, C.M., de Oliveira, A.L., de Oliveira, N.A., Troper, A.

“…Recent experimental results for the magnetic hyperfine field Bhf at the nuclei of s–p impurities such as 119Sn in intermetallic Laves phases RM2 (R=Gd, Tb, Dy,…”
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Effect of hybridization in a two-band Hubbard superconductor: Strong coupling limit with extended s-wave gap by Caixeiro, E.S., Troper, A.

“…The critical temperatures T c , for different hybridization strengths V , are obtained, within a Hubbard-I approximation, using an extended two-band Hubbard…”
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Effect of hybridization in the superconductivity of a two-band system: Strong coupling limit by Caixeiro, E.S., Troper, A.

“…In this work we have considered a two dimensional Hubbard model to study the effect of the hybridization on the superconductivity. Considering a d-wave…”
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Local magnetic moments and hyperfine fields of transition element impurities in ferromagnetic Gd and Tb rare earth metals by de Oliveira, A.L., Tovar Costa, M.V., de Oliveira, N.A., Troper, A.

“…We discuss the formation of the local magnetic moments and the related magnetic hyperfine fields at nd ( n = 3 , 4 , 5 ) transition impurities diluted in…”
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Temperature dependence on magnetic moment formation at a Ce impurity in Gd, Tb, and Dy: An intermediate valence model by de Oliveira, A.L., Troper, A.

“…Based on the influence of the Ce intermediate valence on magnetic properties in metallic systems, we theoretically study the local magnetic moment formation at…”
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A new cooling process driven by charge transfer mechanism: Application to Y b I n C u 4 by de Oliveira, N.A., Troper, A.

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On the use of a single site approximation to describe correlation in pure metals by Chaves, C.M., Gomes, A.A., Troper, A.

“…The magnetic properties of pure transition-like metals are discussed within the single site approximation, to take into account the electron correlation. The…”
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Magnetocaloric effect in the pseudobinary Ho(Co 1− cRh c) 2 by Troper, A, von Ranke, P.J, de Oliveira, N.A

“…In this paper, we study the magnetocaloric effect in the Laves phase pseudobinary Ho(Co 1− c Rh c ) 2. We use a theoretical model, considering both the…”
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