Conductance Plateaus at Quantum Hall Integer Filling Factors in Germanium Quantum Point Contacts
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866917013071331328 |
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| author | Hudson, Karina Costa, Davide Esposti, Davide Degli Stehouwer, Lucas E. A. Scappucci, Giordano |
| author_facet | Hudson, Karina Costa, Davide Esposti, Davide Degli Stehouwer, Lucas E. A. Scappucci, Giordano |
| contents | Constricting transport through a one-dimensional quantum point contact in the quantum Hall regime enables gate-tunable selection of the edge modes propagating between voltage probe electrodes. Here we investigate the quantum Hall effect in a quantum point contact fabricated on low disorder strained germanium quantum wells. For increasing magnetic field, we observe Zeeman spin-split 1D ballistic hole transport evolving to integer quantum Hall states, with well-defined quantised conductance increasing in multiples of $e^2/h$ down to the first integer filling factor $ν=1$. These results establish strained germanium as a viable platform for complex experiments probing many-body states and quantum phase transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_12554 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Conductance Plateaus at Quantum Hall Integer Filling Factors in Germanium Quantum Point Contacts Hudson, Karina Costa, Davide Esposti, Davide Degli Stehouwer, Lucas E. A. Scappucci, Giordano Mesoscale and Nanoscale Physics Constricting transport through a one-dimensional quantum point contact in the quantum Hall regime enables gate-tunable selection of the edge modes propagating between voltage probe electrodes. Here we investigate the quantum Hall effect in a quantum point contact fabricated on low disorder strained germanium quantum wells. For increasing magnetic field, we observe Zeeman spin-split 1D ballistic hole transport evolving to integer quantum Hall states, with well-defined quantised conductance increasing in multiples of $e^2/h$ down to the first integer filling factor $ν=1$. These results establish strained germanium as a viable platform for complex experiments probing many-body states and quantum phase transitions. |
| title | Conductance Plateaus at Quantum Hall Integer Filling Factors in Germanium Quantum Point Contacts |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.12554 |