Fermi-surface reconstruction in CeRh1-xCoxIn5.
作者： Swee K. Goh , Johnpierre Paglione , Mike Sutherland , E. C. T. O’Farrell , C. Bergemann
DOI: 10.1103/PHYSREVLETT.101.056402
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摘要: The evolution of the Fermi surface CeRh(1-x)CoxIn5 was studied as a function Co concentration x via measurements de Haas-van Alphen effect. By measuring angular dependence quantum oscillation frequencies, we identify Fermi-surface sheet with f-electron character which undergoes an abrupt change in topology is varied. Surprisingly, this reconstruction does not occur at critical x(c), where antiferromagnetism suppressed to T=0. Instead establish that sudden occurs well below approximately 0.4, long-range magnetic order alters its and superconductivity appears. Across all concentrations, cyclotron effective mass diverge, suggesting behavior exhibited equally on parts surface.
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