Microscopic Nature of Magnetic Ground State in CeAuSb2
Abstract
Here, the synergistic investigation of ground-state magnetic correlation in the single-crystal heavy fermion compound CeAuSb2 using detailed neutron scattering measurements and density functional calculations is reported. Unlike the previous reports of single antiferromagnetic transition at TN≈ 6 K, three successive transitions with distinct critical exponents atTN = 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.
- Authors:
-
[1]
- Univ. of Missouri, Columbia, MO (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
- Tata Inst. of Fundamental Research, Bombay (India)
- Publication Date:
- Research Org.:
- Univ. of Missouri, Columbia, MO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1594094
- Alternate Identifier(s):
- OSTI ID: 1557011
- Grant/Contract Number:
- SC0014461
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physica Status Solidi rrl
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 10; Journal ID: ISSN 1862-6254
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; density functional calculations; heavy electron compounds; magnetic order; magnetic phase transitions; quantum magnetic phenomena
Citation Formats
Yumnam, George, Chen, Yiyao, Zhao, Yang, Thamizhavel, Arumugam, Dhar, Sudesh K., and Singh, Deepak K. Microscopic Nature of Magnetic Ground State in CeAuSb2. United States: N. p., 2019.
Web. doi:10.1002/pssr.201900304.
Yumnam, George, Chen, Yiyao, Zhao, Yang, Thamizhavel, Arumugam, Dhar, Sudesh K., & Singh, Deepak K. Microscopic Nature of Magnetic Ground State in CeAuSb2. United States. doi:https://doi.org/10.1002/pssr.201900304
Yumnam, George, Chen, Yiyao, Zhao, Yang, Thamizhavel, Arumugam, Dhar, Sudesh K., and Singh, Deepak K. Fri .
"Microscopic Nature of Magnetic Ground State in CeAuSb2". United States. doi:https://doi.org/10.1002/pssr.201900304. https://www.osti.gov/servlets/purl/1594094.
@article{osti_1594094,
title = {Microscopic Nature of Magnetic Ground State in CeAuSb2},
author = {Yumnam, George and Chen, Yiyao and Zhao, Yang and Thamizhavel, Arumugam and Dhar, Sudesh K. and Singh, Deepak K.},
abstractNote = {Here, the synergistic investigation of ground-state magnetic correlation in the single-crystal heavy fermion compound CeAuSb2 using detailed neutron scattering measurements and density functional calculations is reported. Unlike the previous reports of single antiferromagnetic transition at TN≈ 6 K, three successive transitions with distinct critical exponents atTN = 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.},
doi = {10.1002/pssr.201900304},
journal = {Physica Status Solidi rrl},
number = 10,
volume = 13,
place = {United States},
year = {2019},
month = {7}
}
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