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Direct Observation of the Quantum Critical Point in Heavy Fermion CeRhSi3

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Egetenmeyer N, Gavilano J L, Maisuradze A, Gerber S, MacLaughlin D E, Seyfarth G, Andreica D, Desilets-Benoit A, Bianchi A D, Baines C, Khasanov R, Fisk Z, Kenzelmann M,
Project Interplay of Magnetism and Superconductivity in Unconventional Superconductors
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Original article (peer-reviewed)

Journal Phys Rev. Lett
Volume (Issue) 108(17)
Page(s) 177204
Title of proceedings Phys Rev. Lett

Abstract

We report on muon spin rotation studies of the noncentrosymmetric heavy fermion antiferromagnet CeRhSi3. A drastic and monotonic suppression of the internal fields, at the lowest measured temperature, was observed upon an increase of external pressure. Our data suggest that the ordered moments are gradually quenched with increasing pressure, in a manner different from the pressure dependence of the Neel temperature. At 23.6 kbar, the ordered magnetic moments are fully suppressed via a second-order phase transition, and T-N is zero. Thus, we directly observed the quantum critical point at 23.6 kbar hidden inside the superconducting phase of CeRhSi3.
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