Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator
Topological insulators are quantum materials involving time-reversal protected surface states making them appealing candidates for the design of the next generation of highly efficient spintronic devices. The very recent observation of large transient spin-charge conversion and subsequent powerful T...
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-12-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.043332 |
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| _version_ | 1846099454577344512 |
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| author | Armando Pezo Jean-Marie George Henri Jaffrès |
| author_facet | Armando Pezo Jean-Marie George Henri Jaffrès |
| author_sort | Armando Pezo |
| collection | DOAJ |
| description | Topological insulators are quantum materials involving time-reversal protected surface states making them appealing candidates for the design of the next generation of highly efficient spintronic devices. The very recent observation of large transient spin-charge conversion and subsequent powerful THz emission from Co/Bi_{1−x}Sb_{x} bilayers clearly demonstrates such potentiality and feasibility for the near future. Among the exotic properties appearing in and at the surface of such quantum materials, spin-momentum locking and Rashba-Edelstein effects remain as key ingredients to effectively convert the spin degree of freedom into a charge or a voltage signal. In this work, we extend our analyses to the quantification of orbital momentum-locking and related orbital charge conversion effects in Bi_{.85}Sb_{.15} via orbital Rashba-Edelstein effects. In that sense, we will provide some clear theoretical and numerical insights implemented by multiorbital and slab tight-binding methods to clarify our recent experimental results obtained by THz spectroscopy in the time domain. |
| format | Article |
| id | doaj-art-f8ade591da7e43c1993982d7af3e78a6 |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-f8ade591da7e43c1993982d7af3e78a62024-12-31T15:01:45ZengAmerican Physical SocietyPhysical Review Research2643-15642024-12-016404333210.1103/PhysRevResearch.6.043332Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulatorArmando PezoJean-Marie GeorgeHenri JaffrèsTopological insulators are quantum materials involving time-reversal protected surface states making them appealing candidates for the design of the next generation of highly efficient spintronic devices. The very recent observation of large transient spin-charge conversion and subsequent powerful THz emission from Co/Bi_{1−x}Sb_{x} bilayers clearly demonstrates such potentiality and feasibility for the near future. Among the exotic properties appearing in and at the surface of such quantum materials, spin-momentum locking and Rashba-Edelstein effects remain as key ingredients to effectively convert the spin degree of freedom into a charge or a voltage signal. In this work, we extend our analyses to the quantification of orbital momentum-locking and related orbital charge conversion effects in Bi_{.85}Sb_{.15} via orbital Rashba-Edelstein effects. In that sense, we will provide some clear theoretical and numerical insights implemented by multiorbital and slab tight-binding methods to clarify our recent experimental results obtained by THz spectroscopy in the time domain.http://doi.org/10.1103/PhysRevResearch.6.043332 |
| spellingShingle | Armando Pezo Jean-Marie George Henri Jaffrès Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator Physical Review Research |
| title | Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator |
| title_full | Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator |
| title_fullStr | Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator |
| title_full_unstemmed | Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator |
| title_short | Theory of spin and orbital charge conversion at the surface states of Bi_{1−x}Sb_{x} topological insulator |
| title_sort | theory of spin and orbital charge conversion at the surface states of bi 1 x sb x topological insulator |
| url | http://doi.org/10.1103/PhysRevResearch.6.043332 |
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