Fluctuation induced piezomagnetism in local moment altermagnets
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866918021494210560 |
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| author | Yershov, Kostiantyn V. Kravchuk, Volodymyr P. Daghofer, Maria Brink, Jeroen van den |
| author_facet | Yershov, Kostiantyn V. Kravchuk, Volodymyr P. Daghofer, Maria Brink, Jeroen van den |
| contents | It was recently discovered that, depending on their symmetries, collinear antiferromagnets may break spin degeneracy in momentum space, even in absence of spin-orbit coupling. Such systems, dubbed altermagnets, have electronic bands with a spin-momentum texture set mainly by the combined crystal-magnetic symmetry. This discovery motivates the question which novel physical properties derive from altermagnetic order. Here we show that one consequence of altermagnetic order is a fluctuation-driven piezomagnetic response. Using two Heisenberg models of d-wave altermagnets, a checkerboard one and one for rutiles, we determine the fluctuation induced piezomagnetic coefficients considering temperature induced transversal spin fluctuations. We establish in addition that magnetic fluctuations induce an anisotropic thermal spin conductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_01893 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fluctuation induced piezomagnetism in local moment altermagnets Yershov, Kostiantyn V. Kravchuk, Volodymyr P. Daghofer, Maria Brink, Jeroen van den Strongly Correlated Electrons It was recently discovered that, depending on their symmetries, collinear antiferromagnets may break spin degeneracy in momentum space, even in absence of spin-orbit coupling. Such systems, dubbed altermagnets, have electronic bands with a spin-momentum texture set mainly by the combined crystal-magnetic symmetry. This discovery motivates the question which novel physical properties derive from altermagnetic order. Here we show that one consequence of altermagnetic order is a fluctuation-driven piezomagnetic response. Using two Heisenberg models of d-wave altermagnets, a checkerboard one and one for rutiles, we determine the fluctuation induced piezomagnetic coefficients considering temperature induced transversal spin fluctuations. We establish in addition that magnetic fluctuations induce an anisotropic thermal spin conductivity. |
| title | Fluctuation induced piezomagnetism in local moment altermagnets |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2405.01893 |