d-f hybridization and quantum criticality in weakly-itinerant ferromagnets.
作者： M B Silva Neto , A H Castro Neto , J S Kim , G R Stewart
DOI: 10.1088/0953-8984/25/2/025601
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摘要: We investigate the unusual magnetic, thermodynamic and transport properties of nearly-critical, weakly-itinerant ferromagnets with general formula UTX, where T=Rh, Co X=Ge, Si. As a unique feature these systems, we show how changes in Vdf hybridization, which controls their proximity to ferromagnetic instability, determine evolution ground state magnetization, M0, Curie temperature, TC, density states at Fermi level, N(EF), T2 resistivity coefficient, A, specific heat ?. The universal aspect our findings comes from dependence on only two parameters: transition metal Td bandwidth, Wd, distance between Uf band centers, CTd???CUf. discuss results connection data for URh1?xCoxGe.
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sci-hub.se 参考文章(24)
M. Diviš, Electronic structure and magnetism of UCoGe from first principles Physica B-condensed Matter. ,vol. 403, pp. 2505- 2508 ,(2008) , 10.1016/J.PHYSB.2008.01.014
T Gasche, M S S Brooks, B Johansson, Ground-state properties of ternary uranium compounds: I. Hybridization effects Journal of Physics: Condensed Matter. ,vol. 7, pp. 9499- 9510 ,(1995) , 10.1088/0953-8984/7/49/014
M. Diviš, L.M. Sandratskii, M. Richter, P. Mohn, P. Novák, Magnetism of URhSi and URhGe: a density functional study Journal of Alloys and Compounds. ,vol. 337, pp. 48- 52 ,(2002) , 10.1016/S0925-8388(01)01951-X
O. K. Andersen, W. Klose, H. Nohl, Electronic structure of Chevrel-phase high-critical-field superconductors Physical Review B. ,vol. 17, pp. 1209- 1237 ,(1978) , 10.1103/PHYSREVB.17.1209
M. B. Silva Neto, A. H. Castro Neto, D. Mixson, J. S. Kim, G. R. Stewart, Interplay between disorder and quantum and thermal fluctuations in ferromagnetic alloys: The case of UCu2Si2-xGex Physical Review Letters. ,vol. 91, pp. 257206- 257206 ,(2003) , 10.1103/PHYSREVLETT.91.257206
K. Prokeš, T. Tahara, Y. Echizen, T. Takabatake, T. Fujita, I.H. Hagmusa, J.C.P. Klaasse, E. Brück, F.R. de Boer, M. Diviš, V. Sechovský, Electronic properties of a URhGe single crystal Physica B-condensed Matter. ,vol. 311, pp. 220- 232 ,(2002) , 10.1016/S0921-4526(01)01037-7
CD Batista, Janez Bonča, JE Gubernatis, Itinerant ferromagnetism in the periodic Anderson model Physical Review B. ,vol. 68, pp. 214430- ,(2003) , 10.1103/PHYSREVB.68.214430
Walter A. Harrison, Galen K. Straub, Electronic structure and properties of d- and f-shell-metal compounds Physical Review B. ,vol. 36, pp. 2695- 2706 ,(1987) , 10.1103/PHYSREVB.36.2695
M.S.S. Brooks, D. Glötzel, Some aspects of the electronic structure of uranium pnictides and chalcogenides Physica B-condensed Matter. ,vol. 102, pp. 51- 58 ,(1980) , 10.1016/0378-4363(80)90126-6
T. Moriya, Y. Takahashi, Spin Fluctuations in Itinerant Electron Magnetism ,(1985)