Intrinsic torque on the orbital angular momentum in an electric field
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866914889214197760 |
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| author | Atencia, Rhonald Burgos Arovas, Daniel P. Culcer, Dimitrie |
| author_facet | Atencia, Rhonald Burgos Arovas, Daniel P. Culcer, Dimitrie |
| contents | Orbitronics harnesses non-equilibrium densities and flows of electrons orbital angular momentum (OAM). Although the OAM must be long lived to be useful in information processing, the mechanisms leading to OAM non-conservation remain unknown. Here we show that an electric field induces an intrinsic torque on the OAM mediated by the quantum metric tensor, without spin-orbit coupling or magnetic fields. The torque vanishes in pseudospin-1/2 systems with particle-hole symmetry but is nonzero in the presence of nontrivial textures. We discuss implications for topological materials and strategies for experimental observation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_12108 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Intrinsic torque on the orbital angular momentum in an electric field Atencia, Rhonald Burgos Arovas, Daniel P. Culcer, Dimitrie Mesoscale and Nanoscale Physics Orbitronics harnesses non-equilibrium densities and flows of electrons orbital angular momentum (OAM). Although the OAM must be long lived to be useful in information processing, the mechanisms leading to OAM non-conservation remain unknown. Here we show that an electric field induces an intrinsic torque on the OAM mediated by the quantum metric tensor, without spin-orbit coupling or magnetic fields. The torque vanishes in pseudospin-1/2 systems with particle-hole symmetry but is nonzero in the presence of nontrivial textures. We discuss implications for topological materials and strategies for experimental observation. |
| title | Intrinsic torque on the orbital angular momentum in an electric field |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2311.12108 |