Local probes for quantum Hall ferroelectrics and nematics
© 2020 American Physical Society. Two-dimensional multivalley electronic systems in which the dispersion of individual pockets has low symmetry give rise to quantum Hall ferroelectric and nematic states in the presence of strong quantizing magnetic fields. We investigate the local signatures of thes...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/133341 |
| _version_ | 1826212027349073920 |
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| author | Tam, Pok Man Liu, Tongtong Sodemann, Inti Fu, Liang |
| author_facet | Tam, Pok Man Liu, Tongtong Sodemann, Inti Fu, Liang |
| author_sort | Tam, Pok Man |
| collection | MIT |
| description | © 2020 American Physical Society. Two-dimensional multivalley electronic systems in which the dispersion of individual pockets has low symmetry give rise to quantum Hall ferroelectric and nematic states in the presence of strong quantizing magnetic fields. We investigate the local signatures of these states arising near impurities that can be probed via scanning tunneling microscopy (STM) spectroscopy. For quantum Hall ferroelectrics, we demonstrate a direct relation between the dipole moment measured at impurity bound states and the ideal bulk dipole moment obtained from the modern theory of polarization. We also study the many-body problem with a single impurity via exact diagonalization and find that near strong impurities a nontrivial excitonic state can form with specific features that can be easily identified via STM spectroscopy. |
| first_indexed | 2024-09-23T15:15:18Z |
| format | Article |
| id | mit-1721.1/133341 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:15:18Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1333412021-10-28T03:25:04Z Local probes for quantum Hall ferroelectrics and nematics Tam, Pok Man Liu, Tongtong Sodemann, Inti Fu, Liang © 2020 American Physical Society. Two-dimensional multivalley electronic systems in which the dispersion of individual pockets has low symmetry give rise to quantum Hall ferroelectric and nematic states in the presence of strong quantizing magnetic fields. We investigate the local signatures of these states arising near impurities that can be probed via scanning tunneling microscopy (STM) spectroscopy. For quantum Hall ferroelectrics, we demonstrate a direct relation between the dipole moment measured at impurity bound states and the ideal bulk dipole moment obtained from the modern theory of polarization. We also study the many-body problem with a single impurity via exact diagonalization and find that near strong impurities a nontrivial excitonic state can form with specific features that can be easily identified via STM spectroscopy. 2021-10-27T19:52:13Z 2021-10-27T19:52:13Z 2020 2021-07-09T13:44:03Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133341 en 10.1103/PhysRevB.101.241103 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Tam, Pok Man Liu, Tongtong Sodemann, Inti Fu, Liang Local probes for quantum Hall ferroelectrics and nematics |
| title | Local probes for quantum Hall ferroelectrics and nematics |
| title_full | Local probes for quantum Hall ferroelectrics and nematics |
| title_fullStr | Local probes for quantum Hall ferroelectrics and nematics |
| title_full_unstemmed | Local probes for quantum Hall ferroelectrics and nematics |
| title_short | Local probes for quantum Hall ferroelectrics and nematics |
| title_sort | local probes for quantum hall ferroelectrics and nematics |
| url | https://hdl.handle.net/1721.1/133341 |
| work_keys_str_mv | AT tampokman localprobesforquantumhallferroelectricsandnematics AT liutongtong localprobesforquantumhallferroelectricsandnematics AT sodemanninti localprobesforquantumhallferroelectricsandnematics AT fuliang localprobesforquantumhallferroelectricsandnematics |