Helical Topological Superconducting Pairing at Finite Excitation Energies
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2022
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| _version_ | 1866911935302205440 |
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| author | Bahari, Masoud Zhang, Song-Bo Li, Chang-An Choi, Sang-Jun Rüßmann, Philipp Timm, Carsten Trauzettel, Björn |
| author_facet | Bahari, Masoud Zhang, Song-Bo Li, Chang-An Choi, Sang-Jun Rüßmann, Philipp Timm, Carsten Trauzettel, Björn |
| contents | We propose helical topological superconductivity away from the Fermi surface in three-dimensional time-reversal-symmetric odd-parity multiband superconductors. In these systems, pairing between electrons originating from different bands is responsible for the corresponding topological phase transition. Consequently, a pair of helical topological Dirac surface states emerges at finite excitation energies. These helical Dirac surface states are tunable in energy by chemical potential and strength of band-splitting. They are protected by time-reversal symmetry combined with crystalline two-fold rotation symmetry. We suggest concrete materials in which this phenomenon could be observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_11955 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Helical Topological Superconducting Pairing at Finite Excitation Energies Bahari, Masoud Zhang, Song-Bo Li, Chang-An Choi, Sang-Jun Rüßmann, Philipp Timm, Carsten Trauzettel, Björn Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity We propose helical topological superconductivity away from the Fermi surface in three-dimensional time-reversal-symmetric odd-parity multiband superconductors. In these systems, pairing between electrons originating from different bands is responsible for the corresponding topological phase transition. Consequently, a pair of helical topological Dirac surface states emerges at finite excitation energies. These helical Dirac surface states are tunable in energy by chemical potential and strength of band-splitting. They are protected by time-reversal symmetry combined with crystalline two-fold rotation symmetry. We suggest concrete materials in which this phenomenon could be observed. |
| title | Helical Topological Superconducting Pairing at Finite Excitation Energies |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2210.11955 |