Emergent scalar-chirality \& colossal transverse-magnetoresponse in strongly correlated nodal-line half-metal
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909299310067712 |
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| author | Sau, Jyotirmoy Chakraborty, Sourav Saha, Sourabh Pradhan, Kalpataru Mukherjee, Anamitra Kumar, Manoranjan |
| author_facet | Sau, Jyotirmoy Chakraborty, Sourav Saha, Sourabh Pradhan, Kalpataru Mukherjee, Anamitra Kumar, Manoranjan |
| contents | Understanding the interplay of strong correlation and temperature in nodal-line semimetals can offer novel ways to control spin currents. Here we consider the 3d-5d double-perovskite Ba$_{2}$CoWO$_{6}$, which features mirror-symmetry-protected nodal-lines, strong Co-site interactions, and spin-orbit coupling (SOC) at W sites. Our first principles and exact diagonalization results reveal a half-metallic ground state with high-spin Co and topologically non-trivial bands. We demonstrate that SOC gaps out nodal points, causes band-inversion and generates anomalous Hall response. A semi-classical Monte Carlo finite-temperature simulation of five-orbital Hubbard model uncovers an emergent Co-spin scalar chirality and colossal positive transverse-magnetoresponse. We predict the temperature and magnetic field scales for the tunability of scalar-chirality and magnetoresponse. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15754 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent scalar-chirality \& colossal transverse-magnetoresponse in strongly correlated nodal-line half-metal Sau, Jyotirmoy Chakraborty, Sourav Saha, Sourabh Pradhan, Kalpataru Mukherjee, Anamitra Kumar, Manoranjan Strongly Correlated Electrons Understanding the interplay of strong correlation and temperature in nodal-line semimetals can offer novel ways to control spin currents. Here we consider the 3d-5d double-perovskite Ba$_{2}$CoWO$_{6}$, which features mirror-symmetry-protected nodal-lines, strong Co-site interactions, and spin-orbit coupling (SOC) at W sites. Our first principles and exact diagonalization results reveal a half-metallic ground state with high-spin Co and topologically non-trivial bands. We demonstrate that SOC gaps out nodal points, causes band-inversion and generates anomalous Hall response. A semi-classical Monte Carlo finite-temperature simulation of five-orbital Hubbard model uncovers an emergent Co-spin scalar chirality and colossal positive transverse-magnetoresponse. We predict the temperature and magnetic field scales for the tunability of scalar-chirality and magnetoresponse. |
| title | Emergent scalar-chirality \& colossal transverse-magnetoresponse in strongly correlated nodal-line half-metal |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.15754 |