Enhancement of the effective mass at high magnetic fields in
Journal Article
·
· Physical Review B
- Zhejiang Univ., Hangzhou (China). Center for Correlated Matter and Dept. of Physics; Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
- Zhejiang Univ., Hangzhou (China). Center for Correlated Matter and Dept. of Physics
- Univ. of Tokyo (Japan). Inst. for Solid State Physics
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany). Hochfeld-Magnetlabor Dresden (HLD-EMFL)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Zhejiang Univ., Hangzhou (China). Zhejiang Inst. of Modern Physics
- Zhejiang Univ., Hangzhou (China). Center for Correlated Matter and Dept. of Physics; Nanjing Univ. (China). Collaborative Innovation Center of Advanced Microstructures
The Kondo-lattice compound CeRhIn5 displays a field-induced Fermi surface reconstruction at B*≈ 30 T, which occurs within the antiferromagnetic state, prior to the quantum critical point at Bc0 ≈ 50 T. Here, in order to investigate the nature of the Fermi surface change, we measured the magnetostriction, specific heat, and magnetic torque of CeRhIn5 across a wide range of magnetic fields. Our observations uncover the field-induced itineracy of the 4 f electrons, where above Bonset ≈ 17 T there is a significant enhancement of the Sommerfeld coefficient, and spin-dependent effective cyclotron masses determined from quantum oscillations. Upon crossing Bonset, the temperature dependence of the specific heat also shows distinctly different behavior from that at low fields. Finally, our results indicate that the Kondo coupling is remarkably robust upon increasing the magnetic field. This is ascribed to the delocalization of the 4 f electrons at the Fermi surface reconstruction at B*.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1494473
- Alternate ID(s):
- OSTI ID: 1491057
- Report Number(s):
- LA-UR-17-30754
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 4 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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