Enhanced Hybridization Sets the Stage for Electronic Nematicity in
Journal Article
·
· Physical Review Letters
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- National High Magnetic Field Lab., Los Alamos, NM (United States)
- Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
High magnetic fields induce a pronounced in-plane electronic anisotropy in the tetragonal antiferromagnetic metal at H* ≳ 30 T for fields ≃20° off the $$c$$ axis. Here in this paper, we investigate the response of the underlying crystal lattice in magnetic fields to 45 T via high-resolution dilatometry. At low fields, a finite magnetic field component in the tetragonal $ab$ plane explicitly breaks the tetragonal (C4) symmetry of the lattice revealing a finite nematic susceptibility. A modest a-axis expansion at H * hence marks the crossover to a fluctuating nematic phase with large nematic susceptibility. Magnetostriction quantum oscillations confirm a Fermi surface change at H * with the emergence of new orbits. By analyzing the field-induced change in the crystal-field ground state, we conclude that the in-plane Ce $$f$$ hybridization is enhanced at H * , in agreement with the in-plane lattice expansion. We argue that the nematic behavior observed in this prototypical heavy-fermion material is of electronic origin, and is driven by the hybridization between 4$$f$$ and conduction electrons which carries the $$f$$-electron anisotropy to the Fermi surface.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- 89233218CNA000001; SC0012336
- OSTI ID:
- 1511617
- Alternate ID(s):
- OSTI ID: 1489858
- Report Number(s):
- LA-UR--18-30371
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 122; ISSN 0031-9007; ISSN PRLTAO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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