Field-induced quantum critical point in the itinerant antiferromagnet Ti3Cu4
Abstract
New phases of matter emerge at the edge of magnetic instabilities, which can occur in materials with moments that are localized, itinerant or intermediate between these extremes. In local moment systems, such as heavy fermions, the magnetism can be tuned towards a zero-temperature transition at a quantum critical point (QCP) via pressure, chemical doping, and, rarely, magnetic field. By contrast, in itinerant moment systems, QCPs are more rare, and they are induced by pressure or doping; there are no known examples of field induced transitions. This means that no universal behaviour has been established across the whole itinerant-to-local moment range—a substantial gap in our knowledge of quantum criticality. Here we report an itinerant antiferromagnet, Ti3Cu4, that can be tuned to a QCP by a small magnetic field. We see signatures of quantum criticality and the associated non-Fermi liquid behaviour in thermodynamic and transport measurements, while band structure calculations point to an orbital-selective, spin density wave ground state, a consequence of the square net structural motif in Ti3Cu4. Ti3Cu4 thus provides a platform for the comparison and generalisation of quantum critical behaviour across the whole spectrum of magnetism.
- Authors:
-
- Rice Univ., Houston, TX (United States)
- Rice Univ., Houston, TX (United States); Univ. of British Columbia, Vancouver, BC (Canada)
- Rice Univ., Houston, TX (United States); National Cheng Kung Univ., Tainan City (Taiwan)
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- McMaster Univ., Hamilton, ON (Canada)
- McMaster Univ., Hamilton, ON (Canada); TRIUMF, Vancouver, BC (Canada)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF); Taiwan Ministry of Science and Technology (MOST); Robert A. Welch Foundation
- OSTI Identifier:
- 1892435
- Grant/Contract Number:
- AC05-00OR22725; DGE 1842494; DMR 1903741; DMR-1917511; PHY-1748958; ECCS-1542205; DMR-1644779; 109-2112-M-006-026-MY3; 110-2124-M-006-009; C-1818
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Communications Physics
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2399-3650
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Moya, Jaime M., Hallas, Alannah M., Loganathan, Vaideesh, Huang, C. -L., Kish, Lazar L., Aczel, Adam A., Beare, J., Cai, Y., Luke, G. M., Weickert, Franziska, Nevidomskyy, Andriy H., Malliakas, Christos D., Kanatzidis, Mercouri G., Lei, Shiming, Bayliff, Kyle, and Morosan, E. Field-induced quantum critical point in the itinerant antiferromagnet Ti3Cu4. United States: N. p., 2022.
Web. doi:10.1038/s42005-022-00901-7.
Moya, Jaime M., Hallas, Alannah M., Loganathan, Vaideesh, Huang, C. -L., Kish, Lazar L., Aczel, Adam A., Beare, J., Cai, Y., Luke, G. M., Weickert, Franziska, Nevidomskyy, Andriy H., Malliakas, Christos D., Kanatzidis, Mercouri G., Lei, Shiming, Bayliff, Kyle, & Morosan, E. Field-induced quantum critical point in the itinerant antiferromagnet Ti3Cu4. United States. https://doi.org/10.1038/s42005-022-00901-7
Moya, Jaime M., Hallas, Alannah M., Loganathan, Vaideesh, Huang, C. -L., Kish, Lazar L., Aczel, Adam A., Beare, J., Cai, Y., Luke, G. M., Weickert, Franziska, Nevidomskyy, Andriy H., Malliakas, Christos D., Kanatzidis, Mercouri G., Lei, Shiming, Bayliff, Kyle, and Morosan, E. Tue .
"Field-induced quantum critical point in the itinerant antiferromagnet Ti3Cu4". United States. https://doi.org/10.1038/s42005-022-00901-7. https://www.osti.gov/servlets/purl/1892435.
@article{osti_1892435,
title = {Field-induced quantum critical point in the itinerant antiferromagnet Ti3Cu4},
author = {Moya, Jaime M. and Hallas, Alannah M. and Loganathan, Vaideesh and Huang, C. -L. and Kish, Lazar L. and Aczel, Adam A. and Beare, J. and Cai, Y. and Luke, G. M. and Weickert, Franziska and Nevidomskyy, Andriy H. and Malliakas, Christos D. and Kanatzidis, Mercouri G. and Lei, Shiming and Bayliff, Kyle and Morosan, E.},
abstractNote = {New phases of matter emerge at the edge of magnetic instabilities, which can occur in materials with moments that are localized, itinerant or intermediate between these extremes. In local moment systems, such as heavy fermions, the magnetism can be tuned towards a zero-temperature transition at a quantum critical point (QCP) via pressure, chemical doping, and, rarely, magnetic field. By contrast, in itinerant moment systems, QCPs are more rare, and they are induced by pressure or doping; there are no known examples of field induced transitions. This means that no universal behaviour has been established across the whole itinerant-to-local moment range—a substantial gap in our knowledge of quantum criticality. Here we report an itinerant antiferromagnet, Ti3Cu4, that can be tuned to a QCP by a small magnetic field. We see signatures of quantum criticality and the associated non-Fermi liquid behaviour in thermodynamic and transport measurements, while band structure calculations point to an orbital-selective, spin density wave ground state, a consequence of the square net structural motif in Ti3Cu4. Ti3Cu4 thus provides a platform for the comparison and generalisation of quantum critical behaviour across the whole spectrum of magnetism.},
doi = {10.1038/s42005-022-00901-7},
journal = {Communications Physics},
number = 1,
volume = 5,
place = {United States},
year = {Tue May 31 00:00:00 EDT 2022},
month = {Tue May 31 00:00:00 EDT 2022}
}
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