Observation of a Smoothly Tunable Dirac Point in $Ge(Bi_{x}Sb_{1-x})_{2}Te_{4}$
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2021
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| _version_ | 1866917680844374016 |
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| author | Howard, Sean Raghavan, Arjun Iaia, Davide Xu, Caizhi Flötotto, David Wong, Man-Hong Mo, Sung-Kwan Singh, Bahadur Sankar, Raman Lin, Hsin Chiang, Tai-Chang Madhavan, Vidya |
| author_facet | Howard, Sean Raghavan, Arjun Iaia, Davide Xu, Caizhi Flötotto, David Wong, Man-Hong Mo, Sung-Kwan Singh, Bahadur Sankar, Raman Lin, Hsin Chiang, Tai-Chang Madhavan, Vidya |
| contents | State-of-the-art topological devices require the use topological surface states to drive electronic transport. In this study, we examine a tunable topological system, $Ge(Bi_{x}Sb_{1-x})_{2}Te_{4}$, for a range of 'x' values from 0 to 1, using a combination of Fourier Transform Scanning Tunneling Spectroscopy (FT-STS) and Angle-Resolved Photoemission Spectroscopy (ARPES). Our results show that the Dirac point shifts linearly with 'x', crossing the Fermi energy near x = 0.7. This novel observation of a smoothly tunable, isolated Dirac point crossing through the topological transport regime and having strong linear dependence with substitution can be critical for future topological spintronics applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2101_05166 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Observation of a Smoothly Tunable Dirac Point in $Ge(Bi_{x}Sb_{1-x})_{2}Te_{4}$ Howard, Sean Raghavan, Arjun Iaia, Davide Xu, Caizhi Flötotto, David Wong, Man-Hong Mo, Sung-Kwan Singh, Bahadur Sankar, Raman Lin, Hsin Chiang, Tai-Chang Madhavan, Vidya Materials Science Mesoscale and Nanoscale Physics State-of-the-art topological devices require the use topological surface states to drive electronic transport. In this study, we examine a tunable topological system, $Ge(Bi_{x}Sb_{1-x})_{2}Te_{4}$, for a range of 'x' values from 0 to 1, using a combination of Fourier Transform Scanning Tunneling Spectroscopy (FT-STS) and Angle-Resolved Photoemission Spectroscopy (ARPES). Our results show that the Dirac point shifts linearly with 'x', crossing the Fermi energy near x = 0.7. This novel observation of a smoothly tunable, isolated Dirac point crossing through the topological transport regime and having strong linear dependence with substitution can be critical for future topological spintronics applications. |
| title | Observation of a Smoothly Tunable Dirac Point in $Ge(Bi_{x}Sb_{1-x})_{2}Te_{4}$ |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2101.05166 |