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29 March 2024
 
  » arxiv » 1711.0688

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Anomalous connection between antiferromagnetic and superconducting phases in pressurized non-centrosymmetric heavy fermion compound CeRhGe3
Honghong Wang ; Jing Guo ; Eric D. Bauer ; Vladimir A. Sidorov ; Hengcan Zhao ; Jiahao Zhang ; Yazhou Zhou ; Zhe Wang ; Shu Cai ; Ke Yang ; Aiguo Li ; Peijie Sun ; Yi-feng Yang ; Qi Wu ; Tao Xiang ; J. D. Thompson ; Liling Sun ;
Date 2 Nov 2017
AbstractUnconventional superconductivity frequently emerges as the transition temperature of a magnetic phase, typically antiferromagnetic, is suppressed continuously toward zero temperature. Here, we report contrary behavior in pressurized CeRhGe3, a non-centrosymmetric heavy fermion compound. We find that its pressure-tuned antiferromagnetic transition temperature (TN) appears to avoid a continuous decrease to zero temperature by terminating abruptly above a dome of pressure-induced superconductivity. Near 21.5 GPa, evidence for TN suddenly vanishes, the electrical resistance becomes linear in temperature and the superconducting transition reaches a maximum. In light of X-ray absorption spectroscopy measurements, these characteristics appear to be related to a pressured-induced Ce valence instability, which reveals as a sharp increase in the rate of change of Ce valence with applied pressure.
Source arXiv, 1711.0688
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