Quantum transport on the surfaces of topological nodal-line semimetals
Topological nodal-line semimetals are always characterized by the drumhead surface states at the open boundaries. In this paper we first derive an analytical expression for the surface Green’s function of a nodal-line semimetal. By making use of this result, we explore the charge and spin transport...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ad19fb |
| _version_ | 1797353238624731136 |
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| author | Jun-Jie Fu Shu-Tong Guan Jiao Xie Jin An |
| author_facet | Jun-Jie Fu Shu-Tong Guan Jiao Xie Jin An |
| author_sort | Jun-Jie Fu |
| collection | DOAJ |
| description | Topological nodal-line semimetals are always characterized by the drumhead surface states at the open boundaries. In this paper we first derive an analytical expression for the surface Green’s function of a nodal-line semimetal. By making use of this result, we explore the charge and spin transport properties of a metallic chain on the surface of a nodal-line semimetal, as functions of the gate voltage applied on the top of the material. According to the size of the nodal loop, due to the coupling to the surface modes, the charge conductance in the chain is found to show a robust plateau at $e^{2}/h$ , or to exhibit multiple valleys at $e^{2}/h$ . Correspondingly, the spin polarization of the transmitted current is $100\%$ at the plateau region, or exhibits multiple peaks at nearly $100\%$ . This feature can be viewed as a transport signature of the topological nodal-line semimetals. |
| first_indexed | 2024-03-08T13:28:16Z |
| format | Article |
| id | doaj.art-38205fc065fe4b30b96a6997a842c125 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-08T13:28:16Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-38205fc065fe4b30b96a6997a842c1252024-01-17T11:48:22ZengIOP PublishingNew Journal of Physics1367-26302024-01-0126101303210.1088/1367-2630/ad19fbQuantum transport on the surfaces of topological nodal-line semimetalsJun-Jie Fu0https://orcid.org/0009-0000-6883-8334Shu-Tong Guan1Jiao Xie2Jin An3National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University , Nanjing 210093, People’s Republic of ChinaNational Laboratory of Solid State Microstructures, Department of Physics, Nanjing University , Nanjing 210093, People’s Republic of ChinaNational Laboratory of Solid State Microstructures, Department of Physics, Nanjing University , Nanjing 210093, People’s Republic of ChinaNational Laboratory of Solid State Microstructures, Department of Physics, Nanjing University , Nanjing 210093, People’s Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaTopological nodal-line semimetals are always characterized by the drumhead surface states at the open boundaries. In this paper we first derive an analytical expression for the surface Green’s function of a nodal-line semimetal. By making use of this result, we explore the charge and spin transport properties of a metallic chain on the surface of a nodal-line semimetal, as functions of the gate voltage applied on the top of the material. According to the size of the nodal loop, due to the coupling to the surface modes, the charge conductance in the chain is found to show a robust plateau at $e^{2}/h$ , or to exhibit multiple valleys at $e^{2}/h$ . Correspondingly, the spin polarization of the transmitted current is $100\%$ at the plateau region, or exhibits multiple peaks at nearly $100\%$ . This feature can be viewed as a transport signature of the topological nodal-line semimetals.https://doi.org/10.1088/1367-2630/ad19fbquantum transportnodal-line semimetalsurface statesGreen’s functionspintronics |
| spellingShingle | Jun-Jie Fu Shu-Tong Guan Jiao Xie Jin An Quantum transport on the surfaces of topological nodal-line semimetals New Journal of Physics quantum transport nodal-line semimetal surface states Green’s function spintronics |
| title | Quantum transport on the surfaces of topological nodal-line semimetals |
| title_full | Quantum transport on the surfaces of topological nodal-line semimetals |
| title_fullStr | Quantum transport on the surfaces of topological nodal-line semimetals |
| title_full_unstemmed | Quantum transport on the surfaces of topological nodal-line semimetals |
| title_short | Quantum transport on the surfaces of topological nodal-line semimetals |
| title_sort | quantum transport on the surfaces of topological nodal line semimetals |
| topic | quantum transport nodal-line semimetal surface states Green’s function spintronics |
| url | https://doi.org/10.1088/1367-2630/ad19fb |
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