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Title: Anomalous connection between antiferromagnetic and superconducting phases in the pressurized noncentrosymmetric heavy-fermion compound CeRhG e 3

Journal Article · · Physical Review B
 [1];  [2]; ORCiD logo [3];  [4];  [1];  [1];  [1];  [1];  [1];  [5];  [5];  [2];  [1];  [2];  [1];  [3];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Inst. for High Pressure Physics
  5. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics, Shanghai Synchrotron Radiation Facilities
+ Show Author Affiliations

Unconventional superconductivity frequently emerges as the transition temperature of a magnetic phase, typically antiferromagnetic (AFM), is suppressed continuously toward zero temperature. Here in this paper, we report contrary behavior in pressurized CeRhGe3, a noncentrosymmetric heavy-fermion compound. We find that its pressure-tuned AFM 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. Analysis of high-pressure resistance and x-ray-absorption spectroscopy measurements suggest that the anomalous connection between antiferromagnetic and superconducting phases in pressurized CeRhGe3 is associated with proximity to a critical valence instability.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1495148
Report Number(s):
LA-UR-17-30186
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 99; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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