Premium
Microscopic Nature of Magnetic Ground State in CeAuSb 2
Author(s) -
Yumnam George,
Chen Yiyao,
Zhao Yang,
Thamizhavel Arumugam,
Dhar Sudesh K.,
Singh Deepak K.
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201900304
Subject(s) - condensed matter physics , ground state , antiferromagnetism , magnetism , spin density wave , physics , wave vector , magnetic field , fermi surface , neutron scattering , spin (aerodynamics) , magnetic structure , magnetization , scattering , quantum mechanics , superconductivity , thermodynamics
The synergistic investigation of ground‐state magnetic correlation in the single‐crystal heavy fermion compound CeAuSb 2 using detailed neutron scattering measurements and density functional calculations is reported. Unlike the previous reports of single antiferromagnetic transition at T N ≈ 6 K, three successive transitions with distinct critical exponents at T N = 5.3, 4.46, and 3.76 K, respectively, are detected in CeAuSb. The low‐temperature ground‐state magnetic correlation is described by the spin density wave order in the basal plane with propagation wave vector τ = (0.135, 0.135, 0.5) rlu. The spin density wave order arises due to the nesting of hole pockets in the Fermi surface, with parallel surfaces being separated by the experimentally found propagation vector τ . The comprehensive investigation of magnetic ground‐state properties is expected to provide new insights in understanding the emerging quantum magnetism in this system, including the debated quantum critical state and magnetic field‐induced metamagnetic transitions at low temperature.