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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.22227 |
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| _version_ | 1866910245513592832 |
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| author | Kumar, M. Maneesh Faiyaz, Md Kaif Sarkar, Sayan Agarwal, Amit |
| author_facet | Kumar, M. Maneesh Faiyaz, Md Kaif Sarkar, Sayan Agarwal, Amit |
| contents | Geometric analogs of Bloch oscillations studied so far have relied on Berry curvature. We show that a weakly inhomogeneous electric field adds a distinct quantum-metric term to semiclassical wavepacket dynamics, generating an oscillatory real-space contribution even when the Berry curvature vanishes. The associated transport response comprises an intrinsic and a scattering-time-dependent part. In the regime studied, the latter can dominate and approach finite saturation at high field when the relative field inhomogeneity is held fixed. A tilted Dirac model illustrates the mechanism. Realistic platforms will likely require synthetically engineered superlattices, with a finite quantum metric and an adequate band gap. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_22227 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum-metric Bloch oscillations in weakly inhomogeneous electric fields Kumar, M. Maneesh Faiyaz, Md Kaif Sarkar, Sayan Agarwal, Amit Mesoscale and Nanoscale Physics Geometric analogs of Bloch oscillations studied so far have relied on Berry curvature. We show that a weakly inhomogeneous electric field adds a distinct quantum-metric term to semiclassical wavepacket dynamics, generating an oscillatory real-space contribution even when the Berry curvature vanishes. The associated transport response comprises an intrinsic and a scattering-time-dependent part. In the regime studied, the latter can dominate and approach finite saturation at high field when the relative field inhomogeneity is held fixed. A tilted Dirac model illustrates the mechanism. Realistic platforms will likely require synthetically engineered superlattices, with a finite quantum metric and an adequate band gap. |
| title | Quantum-metric Bloch oscillations in weakly inhomogeneous electric fields |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2605.22227 |