Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915567064055808 |
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| author | Melnikov, M. Yu. Smirnov, D. G. Shashkin, A. A. Huang, S. -H. Liu, C. W. Kravchenko, S. V. |
| author_facet | Melnikov, M. Yu. Smirnov, D. G. Shashkin, A. A. Huang, S. -H. Liu, C. W. Kravchenko, S. V. |
| contents | We find that the behaviors of the voltage-current characteristics as one enters the low-density insulating state and integer quantum Hall insulating states in the ultra-clean two-dimensional electron system in SiGe/Si/SiGe quantum wells are qualitatively different. The double-threshold voltage-current curves, representative of the electron solid formation at low densities, are not observed in the quantum Hall regime, which does not confirm the existence of a quasi-particle quantum Hall Wigner solid and indicates that quasi-particles near integer filling do not form an independent subsystem. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_02738 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system Melnikov, M. Yu. Smirnov, D. G. Shashkin, A. A. Huang, S. -H. Liu, C. W. Kravchenko, S. V. Strongly Correlated Electrons Mesoscale and Nanoscale Physics We find that the behaviors of the voltage-current characteristics as one enters the low-density insulating state and integer quantum Hall insulating states in the ultra-clean two-dimensional electron system in SiGe/Si/SiGe quantum wells are qualitatively different. The double-threshold voltage-current curves, representative of the electron solid formation at low densities, are not observed in the quantum Hall regime, which does not confirm the existence of a quasi-particle quantum Hall Wigner solid and indicates that quasi-particles near integer filling do not form an independent subsystem. |
| title | Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2504.02738 |