Fermi surface topology and signature of surface Dirac nodes in LaBi
Abstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due t...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-06697-9 |
| _version_ | 1818345138428051456 |
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| author | Ratnadwip Singha Biswarup Satpati Prabhat Mandal |
| author_facet | Ratnadwip Singha Biswarup Satpati Prabhat Mandal |
| author_sort | Ratnadwip Singha |
| collection | DOAJ |
| description | Abstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due to the potential technological applications. Extreme magnetoresistance and ultrahigh carrier mobility are two such major hallmarks of topological materials and often used as primary criteria for identifying new compounds belonging to this class. Recently, LaBi has emerged as a new system, which exhibits the above mentioned properties. However, the topological nature of its band structure remains unresolved. Here, using the magnetotransport and magnetization measurements, we have probed the bulk and surface states of LaBi. Similar to earlier reports, extremely large magnetoresistance and high carrier mobility have been observed with compensated electron and hole density. The Fermi surface properties have been analyzed from both Shubnikov-de Haas and de Haas-van Alphen oscillation techniques. In the magnetization measurement, a prominent paramagnetic singularity has been observed, which demonstrates the non-trivial nature of the surface states in LaBi. Our study unambiguously confirms that LaBi is a three-dimensional topological insulator with possible linear dispersion in the gapped bulk band structure. |
| first_indexed | 2024-12-13T16:57:36Z |
| format | Article |
| id | doaj.art-5357d6444af0420299e65ea7f991566a |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T16:57:36Z |
| publishDate | 2017-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5357d6444af0420299e65ea7f991566a2022-12-21T23:37:53ZengNature PortfolioScientific Reports2045-23222017-07-01711910.1038/s41598-017-06697-9Fermi surface topology and signature of surface Dirac nodes in LaBiRatnadwip Singha0Biswarup Satpati1Prabhat Mandal2Saha Institute of Nuclear Physics, HBNISaha Institute of Nuclear Physics, HBNISaha Institute of Nuclear Physics, HBNIAbstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due to the potential technological applications. Extreme magnetoresistance and ultrahigh carrier mobility are two such major hallmarks of topological materials and often used as primary criteria for identifying new compounds belonging to this class. Recently, LaBi has emerged as a new system, which exhibits the above mentioned properties. However, the topological nature of its band structure remains unresolved. Here, using the magnetotransport and magnetization measurements, we have probed the bulk and surface states of LaBi. Similar to earlier reports, extremely large magnetoresistance and high carrier mobility have been observed with compensated electron and hole density. The Fermi surface properties have been analyzed from both Shubnikov-de Haas and de Haas-van Alphen oscillation techniques. In the magnetization measurement, a prominent paramagnetic singularity has been observed, which demonstrates the non-trivial nature of the surface states in LaBi. Our study unambiguously confirms that LaBi is a three-dimensional topological insulator with possible linear dispersion in the gapped bulk band structure.https://doi.org/10.1038/s41598-017-06697-9 |
| spellingShingle | Ratnadwip Singha Biswarup Satpati Prabhat Mandal Fermi surface topology and signature of surface Dirac nodes in LaBi Scientific Reports |
| title | Fermi surface topology and signature of surface Dirac nodes in LaBi |
| title_full | Fermi surface topology and signature of surface Dirac nodes in LaBi |
| title_fullStr | Fermi surface topology and signature of surface Dirac nodes in LaBi |
| title_full_unstemmed | Fermi surface topology and signature of surface Dirac nodes in LaBi |
| title_short | Fermi surface topology and signature of surface Dirac nodes in LaBi |
| title_sort | fermi surface topology and signature of surface dirac nodes in labi |
| url | https://doi.org/10.1038/s41598-017-06697-9 |
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