Thermodynamic measurements on g-wave altermagnet candidate MnTe
ORAL
Abstract
Altermagnetism describes materials with collinear spin arrangements which exhibit compensated magnetization (similar to antiferromagnets) and spin-split energy levels (similar to ferromagnets). This combination of properties makes altermagnets compelling for applications such as spin-based information technologies. Fundamentally, altermagnetism is also quite interesting because there is an expectation of complex band splitting associated with multipolar order in altermagnetic compounds.
One candidate altermagnetic material is MnTe. This system is known to possess antiferromagnetic order characterized by a high transition temperature and large spin-splitting between electronic states. MnTe is also expected to host a g-wave altermagnetic phase. We investigate possible signatures of g-wave altermagnetism in bulk single crystals of MnTe via measurements of thermodynamic properties above and below the magnetic phase transition near room temperature. We augment these temperature-dependent results with measurements at the National High Magnetic Field Laboratory’s Pulsed Field Facility to characterize field-dependent changes in MnTe up to 65T.
One candidate altermagnetic material is MnTe. This system is known to possess antiferromagnetic order characterized by a high transition temperature and large spin-splitting between electronic states. MnTe is also expected to host a g-wave altermagnetic phase. We investigate possible signatures of g-wave altermagnetism in bulk single crystals of MnTe via measurements of thermodynamic properties above and below the magnetic phase transition near room temperature. We augment these temperature-dependent results with measurements at the National High Magnetic Field Laboratory’s Pulsed Field Facility to characterize field-dependent changes in MnTe up to 65T.
*This work was supported by the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project number 20240225ER. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-2128556 and the State of Florida. The work at University of Tennessee was supported by U.S. Department of Energy with Grant No. DE-SC0020254.
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Presenters
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Christopher A Mizzi
- Los Alamos National Laboratory (LANL)
- Los Alamos National Laboratory