An Unusual Dresselhaus Spin-Orbit Contribution of Even Order in Momentum
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909894035111936 |
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| author | Yang, Hao Wang, Wei Ferreira, Gerson J. Hao, Ning Zhang, Ping Fu, Jiyong |
| author_facet | Yang, Hao Wang, Wei Ferreira, Gerson J. Hao, Ning Zhang, Ping Fu, Jiyong |
| contents | The spin-orbit (SO) coupling is conventionally known to manifest as \emph{odd} functions of momentum. Here, through both model calculations and symmetry analysis along with the method of invariants, we reveal that, in ordinary semiconductor heterostructures, a \emph{quadratic} Dresselhaus SO term -- inheriting from its bulk crystal form -- emerges via the interband effect, while complying with time-reversal and spatial symmetries. Furthermore, we observe that this unusual SO term gives rise to a range of striking quantum phenomena, including hybridized swirling texture, anisotropic energy dispersion, avoided band crossing, longitudinal \emph{Zitterbewegung}, and opposite spin evolution between different bands in quantum dynamics. These stand in stark contrast to those associated with the usual \emph{linear} SO terms. Our findings uncover a previously overlooked route for exploiting interband effects and open new avenues for spintronic functionalities that leverage unusual SO terms of \emph{even} orders in momentum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_05787 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An Unusual Dresselhaus Spin-Orbit Contribution of Even Order in Momentum Yang, Hao Wang, Wei Ferreira, Gerson J. Hao, Ning Zhang, Ping Fu, Jiyong Mesoscale and Nanoscale Physics The spin-orbit (SO) coupling is conventionally known to manifest as \emph{odd} functions of momentum. Here, through both model calculations and symmetry analysis along with the method of invariants, we reveal that, in ordinary semiconductor heterostructures, a \emph{quadratic} Dresselhaus SO term -- inheriting from its bulk crystal form -- emerges via the interband effect, while complying with time-reversal and spatial symmetries. Furthermore, we observe that this unusual SO term gives rise to a range of striking quantum phenomena, including hybridized swirling texture, anisotropic energy dispersion, avoided band crossing, longitudinal \emph{Zitterbewegung}, and opposite spin evolution between different bands in quantum dynamics. These stand in stark contrast to those associated with the usual \emph{linear} SO terms. Our findings uncover a previously overlooked route for exploiting interband effects and open new avenues for spintronic functionalities that leverage unusual SO terms of \emph{even} orders in momentum. |
| title | An Unusual Dresselhaus Spin-Orbit Contribution of Even Order in Momentum |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.05787 |