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Document type:
Zeitschriftenaufsatz 
Author(s):
Vollmer, R.; Fai\ss{}t, A.; Pfleiderer, C.; {v. L̈ohneysen}, H.; Bauer, E. D.; Ho, P.-C.; Zapf, V.; Maple, M. B. 
Title:
Low-{{Temperature Specific Heat}} of the {{Heavy}}-{{Fermion Superconductor}} $\mathrm{Pr}\mathrm{O}{\mathrm{s}}_{\mathrm{4}}\mathrm{S}{\mathrm{b}}_{\mathrm{12}}$ 
Abstract:
We report the magnetic field dependence of the specific-heat C of single crystals of the first Pr-based heavy-fermion superconductor Pr Os4Sb12. The variation of C at low temperature and the magnetic phase diagram inferred from C, the resistivity and magnetization provide compelling evidence of a doublet ground state. Two distinct superconducting anomalies in C indicate an unconventional superconducting state, where the splitting may arise from a weak lifting of the ground state degeneracy. In c...    »
 
Journal title:
Physical Review Letters 
Year:
2003 
Journal volume:
90 
Month:
feb 
Journal issue:
Pages contribution:
057001