Jahn-Teller Effect and Spin-Orbit Coupling: Friends or Foes?
The Jahn-Teller effect is one of the most fundamental phenomena important not only for physics but also for chemistry and material science. Solving the Jahn-Teller problem and taking into account strong electron correlations we show that quantum entanglement of the spin and orbital degrees of freedo...
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| Main Authors: | , |
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| Format: | article |
| Language: | EN |
| Published: |
American Physical Society
2020
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| Subjects: | |
| Online Access: | https://doaj.org/article/71d5d8d337f24717a306ae1d3cc20ec7 |
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| Summary: | The Jahn-Teller effect is one of the most fundamental phenomena important not only for physics but also for chemistry and material science. Solving the Jahn-Teller problem and taking into account strong electron correlations we show that quantum entanglement of the spin and orbital degrees of freedom via spin-orbit coupling strongly affects this effect. Depending on the number of d electrons, it may quench (electronic configurations t_{2g}^{2}, t_{2g}^{4}, and t_{2g}^{5}), partially suppress (t_{2g}^{1}), or, in contrast, induce (t_{2g}^{3}) Jahn-Teller distortions. Moreover, in certain situations, interplay between the Jahn-Teller effect and spin-orbit coupling promotes formation of the “Mexican hat” energy surface facilitating various quantum phenomena. |
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