Controlling Orbital Magnetism of Band Electron Systems via Bath Engineering
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912077453459456 |
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| author | Chakraborty, Subrata Takei, So |
| author_facet | Chakraborty, Subrata Takei, So |
| contents | Orbital magnetism arises due to the coherent cyclotron motion of band electrons. System-bath entanglement is expected to disrupt this coherent electronic motion and quench orbital magnetism. Here, we show that a suitably-tailored bath can lead to an enhancement of the orbital diamagnetic susceptibility of a multi-band electron system and can even convert an orbital paramagnetic response into a diamagnetic one as the system-bath coupling is increased. We also demonstrate how a van Hove singularity in the bath density of states can be exploited to generate a giant enhancement of the orbital magnetic susceptibility. Our work opens doors to the possibility of controlling the orbital magnetic response of band electron systems through bath engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_09100 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Controlling Orbital Magnetism of Band Electron Systems via Bath Engineering Chakraborty, Subrata Takei, So Strongly Correlated Electrons Orbital magnetism arises due to the coherent cyclotron motion of band electrons. System-bath entanglement is expected to disrupt this coherent electronic motion and quench orbital magnetism. Here, we show that a suitably-tailored bath can lead to an enhancement of the orbital diamagnetic susceptibility of a multi-band electron system and can even convert an orbital paramagnetic response into a diamagnetic one as the system-bath coupling is increased. We also demonstrate how a van Hove singularity in the bath density of states can be exploited to generate a giant enhancement of the orbital magnetic susceptibility. Our work opens doors to the possibility of controlling the orbital magnetic response of band electron systems through bath engineering. |
| title | Controlling Orbital Magnetism of Band Electron Systems via Bath Engineering |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.09100 |