Eightfold fermionic excitation in a charge density wave compound
© 2020 American Physical Society. Unconventional quasiparticle excitations in condensed matter systems have become one of the most important research frontiers. Beyond twofold and fourfold degenerate Weyl and Dirac fermions, threefold, sixfold, and eightfold symmetry protected degeneracies have been...
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/132216 |
| _version_ | 1826210977363787776 |
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| author | Zhang, Xi Gu, Qiangqiang Sun, Haigen Luo, Tianchuang Liu, Yanzhao Chen, Yueyuan Shao, Zhibin Zhang, Zongyuan Li, Shaojian Sun, Yuanwei Li, Yuehui Li, Xiaokang Xue, Shangjie Ge, Jun Xing, Ying Comin, R Zhu, Zengwei Gao, Peng Yan, Binghai Feng, Ji Pan, Minghu Wang, Jian |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Zhang, Xi Gu, Qiangqiang Sun, Haigen Luo, Tianchuang Liu, Yanzhao Chen, Yueyuan Shao, Zhibin Zhang, Zongyuan Li, Shaojian Sun, Yuanwei Li, Yuehui Li, Xiaokang Xue, Shangjie Ge, Jun Xing, Ying Comin, R Zhu, Zengwei Gao, Peng Yan, Binghai Feng, Ji Pan, Minghu Wang, Jian |
| author_sort | Zhang, Xi |
| collection | MIT |
| description | © 2020 American Physical Society. Unconventional quasiparticle excitations in condensed matter systems have become one of the most important research frontiers. Beyond twofold and fourfold degenerate Weyl and Dirac fermions, threefold, sixfold, and eightfold symmetry protected degeneracies have been predicted. However they remain challenging to realize in solid state materials. Here the charge density wave compound TaTe4 is proposed to hold eightfold fermionic excitation and Dirac point in energy bands. High quality TaTe4 single crystals are prepared, where the charge density wave is revealed by directly imaging the atomic structure and a pseudogap of about 45 meV on the surface. Shubnikov-de Haas oscillations of TaTe4 are consistent with band structure calculation. Scanning tunneling microscopy/spectroscopy reveals atomic step edge states on the surface of TaTe4. This work uncovers that the charge density wave is able to induce new topological phases and sheds new light on the novel excitations in condensed matter materials. |
| first_indexed | 2024-09-23T14:58:47Z |
| format | Article |
| id | mit-1721.1/132216 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:58:47Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1322162023-10-13T20:22:02Z Eightfold fermionic excitation in a charge density wave compound Zhang, Xi Gu, Qiangqiang Sun, Haigen Luo, Tianchuang Liu, Yanzhao Chen, Yueyuan Shao, Zhibin Zhang, Zongyuan Li, Shaojian Sun, Yuanwei Li, Yuehui Li, Xiaokang Xue, Shangjie Ge, Jun Xing, Ying Comin, R Zhu, Zengwei Gao, Peng Yan, Binghai Feng, Ji Pan, Minghu Wang, Jian Massachusetts Institute of Technology. Department of Physics © 2020 American Physical Society. Unconventional quasiparticle excitations in condensed matter systems have become one of the most important research frontiers. Beyond twofold and fourfold degenerate Weyl and Dirac fermions, threefold, sixfold, and eightfold symmetry protected degeneracies have been predicted. However they remain challenging to realize in solid state materials. Here the charge density wave compound TaTe4 is proposed to hold eightfold fermionic excitation and Dirac point in energy bands. High quality TaTe4 single crystals are prepared, where the charge density wave is revealed by directly imaging the atomic structure and a pseudogap of about 45 meV on the surface. Shubnikov-de Haas oscillations of TaTe4 are consistent with band structure calculation. Scanning tunneling microscopy/spectroscopy reveals atomic step edge states on the surface of TaTe4. This work uncovers that the charge density wave is able to induce new topological phases and sheds new light on the novel excitations in condensed matter materials. 2021-09-20T18:21:22Z 2021-09-20T18:21:22Z 2020 2020-09-22T18:48:02Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132216 en 10.1103/PhysRevB.102.035125 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 | Zhang, Xi Gu, Qiangqiang Sun, Haigen Luo, Tianchuang Liu, Yanzhao Chen, Yueyuan Shao, Zhibin Zhang, Zongyuan Li, Shaojian Sun, Yuanwei Li, Yuehui Li, Xiaokang Xue, Shangjie Ge, Jun Xing, Ying Comin, R Zhu, Zengwei Gao, Peng Yan, Binghai Feng, Ji Pan, Minghu Wang, Jian Eightfold fermionic excitation in a charge density wave compound |
| title | Eightfold fermionic excitation in a charge density wave compound |
| title_full | Eightfold fermionic excitation in a charge density wave compound |
| title_fullStr | Eightfold fermionic excitation in a charge density wave compound |
| title_full_unstemmed | Eightfold fermionic excitation in a charge density wave compound |
| title_short | Eightfold fermionic excitation in a charge density wave compound |
| title_sort | eightfold fermionic excitation in a charge density wave compound |
| url | https://hdl.handle.net/1721.1/132216 |
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