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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

CeAu2Bi: A new nonsymmorphic antiferromagnetic compound

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Author(s):
Piva, M. M. [1, 2] ; Zhu, W. [1, 3, 4] ; Ronning, F. [1] ; Thompson, J. D. [1] ; Pagliuso, P. G. [2] ; Rosa, P. F. S. [1]
Total Authors: 6
Affiliation:
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 - USA
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] Westlake Univ, Inst Nat Sci, Westlake Inst Adv Study, Hangzhou 310024, Zhejiang - Peoples R China
[4] Westlake Univ, Sch Sci, Hangzhou 310024, Zhejiang - Peoples R China
Total Affiliations: 4
Document type: Journal article
Source: PHYSICAL REVIEW MATERIALS; v. 3, n. 7 JUL 23 2019.
Web of Science Citations: 0
Abstract

Here, we report the structural and electronic properties of CeAu2Bi, a new heavy-fermion compound crystallizing in a nonsymmorphic hexagonal structure (P63/mmc). The Ce3+ ions form a triangular lattice which orders antiferromagnetically below T-N = 3.1 K with a magnetic hard axis along the c axis. Under applied pressure, T-N increases linearly at a rate of 0.07 K/kbar, indicating that the Ce f electrons are fairly localized. In fact, heat capacity measurements provide an estimate of 150(10) mJ/mol K-2 for the Sommerfeld coefficient. The crystal-field scheme obtained from our thermodynamic data points to a ground state with a dominantly vertical bar j(z) = +/- 1/2 > character, which commonly occurs in systems with a hard c axis. Finally, electronic band structure calculations and symmetry analysis in k space reveal that CeAu2Bi hosts symmetry-protected crossings at k(z) = pi in the paramagnetic state. (AU)

FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/15665-3 - Studies of orbital differentiation effects in the magnetic and superconducting properties of FeAs based compounds
Grantee:Mário Moda Piva
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 17/25269-3 - High pressure studies in SrFe2As2, CaMn2Bi2 and CeAuBi2 compounds
Grantee:Mário Moda Piva
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)