Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3]
The search for unconventional superconductivity has been focused on materials with strong spin-orbit coupling and unique crystal lattices. Doped bismuth selenide (Bi[subscript 2]Se[subscript 3]) is a strong candidate, given the topological insulator nature of the parent compound and its triangular l...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/107478 https://orcid.org/0000-0002-8803-1017 |
| _version_ | 1811072114941231104 |
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| author | Asaba, Tomoya Lawson, B. J. Tinsman, Colin Chen, Lu Corbae, Paul Li, Gang Qiu, Y. Hor, Y. S. Li, Lu Fu, Liang |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Asaba, Tomoya Lawson, B. J. Tinsman, Colin Chen, Lu Corbae, Paul Li, Gang Qiu, Y. Hor, Y. S. Li, Lu Fu, Liang |
| author_sort | Asaba, Tomoya |
| collection | MIT |
| description | The search for unconventional superconductivity has been focused on materials with strong spin-orbit coupling and unique crystal lattices. Doped bismuth selenide (Bi[subscript 2]Se[subscript 3]) is a strong candidate, given the topological insulator nature of the parent compound and its triangular lattice. The coupling between the physical properties in the superconducting state and its underlying crystal symmetry is a crucial test for unconventional superconductivity. In this paper, we report direct evidence that the superconducting magnetic response couples strongly to the underlying trigonal crystal symmetry in the recently discovered superconductor with trigonal crystal structure, niobium (Nb)-doped Bi[subscript 2]Se[subscript 3]. As a result, the in-plane magnetic torque signal vanishes every 60°. More importantly, the superconducting hysteresis loop amplitude is enhanced along one preferred direction, spontaneously breaking the rotational symmetry. This observation indicates the presence of nematic order in the superconducting ground state of Nb-doped Bi[subscript 2]Se[subscript 3]. |
| first_indexed | 2024-09-23T09:01:07Z |
| format | Article |
| id | mit-1721.1/107478 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:01:07Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1074782022-09-26T09:52:14Z Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi2Se3 Asaba, Tomoya Lawson, B. J. Tinsman, Colin Chen, Lu Corbae, Paul Li, Gang Qiu, Y. Hor, Y. S. Li, Lu Fu, Liang Massachusetts Institute of Technology. Department of Physics Fu, Liang The search for unconventional superconductivity has been focused on materials with strong spin-orbit coupling and unique crystal lattices. Doped bismuth selenide (Bi[subscript 2]Se[subscript 3]) is a strong candidate, given the topological insulator nature of the parent compound and its triangular lattice. The coupling between the physical properties in the superconducting state and its underlying crystal symmetry is a crucial test for unconventional superconductivity. In this paper, we report direct evidence that the superconducting magnetic response couples strongly to the underlying trigonal crystal symmetry in the recently discovered superconductor with trigonal crystal structure, niobium (Nb)-doped Bi[subscript 2]Se[subscript 3]. As a result, the in-plane magnetic torque signal vanishes every 60°. More importantly, the superconducting hysteresis loop amplitude is enhanced along one preferred direction, spontaneously breaking the rotational symmetry. This observation indicates the presence of nematic order in the superconducting ground state of Nb-doped Bi[subscript 2]Se[subscript 3]. United States. Dept. of Energy (Grant DE-SC0008110) National Science Foundation (U.S.) (Grant DMR-1255607) David & Lucile Packard Foundation 2017-03-17T19:20:02Z 2017-03-17T19:20:02Z 2017-01 2016-11 2017-01-27T23:00:02Z Article http://purl.org/eprint/type/JournalArticle 2160-3308 http://hdl.handle.net/1721.1/107478 Asaba, Tomoya et al. “Rotational Symmetry Breaking in a Trigonal Superconductor Nb-Doped Bi 2 Se 3.” Physical Review X 7.1 (2017): n. pag. © 2017 American Physical Society https://orcid.org/0000-0002-8803-1017 en http://dx.doi.org/10.1103/PhysRevX.7.011009 Physical Review X Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 authors application/pdf American Physical Society American Physical Society |
| spellingShingle | Asaba, Tomoya Lawson, B. J. Tinsman, Colin Chen, Lu Corbae, Paul Li, Gang Qiu, Y. Hor, Y. S. Li, Lu Fu, Liang Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title | Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title_full | Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title_fullStr | Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title_full_unstemmed | Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title_short | Rotational Symmetry Breaking in a Trigonal Superconductor Nb-doped Bi[subscript 2]Se[subscript 3] |
| title_sort | rotational symmetry breaking in a trigonal superconductor nb doped bi subscript 2 se subscript 3 |
| url | http://hdl.handle.net/1721.1/107478 https://orcid.org/0000-0002-8803-1017 |
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