Quantum interference among vortex bound states in superconductors
In a recent experiment (Hou et al 2025 Phys. Rev. X 15 011027), a new type of necklace-like vortex bound state (VBS) was observed and attributed to disorder induced interference among different Caroli–de Gennes–Matricon (CdGM) states within one single vortex. In this work, we further investigate the...
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/adea18 |
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| author | Yi-Ming Fu Da Wang Qiang-Hua Wang |
| author_facet | Yi-Ming Fu Da Wang Qiang-Hua Wang |
| author_sort | Yi-Ming Fu |
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| description | In a recent experiment (Hou et al 2025 Phys. Rev. X 15 011027), a new type of necklace-like vortex bound state (VBS) was observed and attributed to disorder induced interference among different Caroli–de Gennes–Matricon (CdGM) states within one single vortex. In this work, we further investigate the possibilities of quantum interference among the CdGM states from different vortices in clean superconductors, which may become significant near the upper critical field. We find a series of interference patterns in the local density of states (LDOS) due to the overlap between spatially separated individual CdGM states. On a vortex lattice, the interference can also lead to a necklace-like LDOS, hence, providing an alternative and intrinsic mechanism to observe the novel necklace-like, or other spatially modulated VBS more generally, in experiments. These results can be understood quite well within an effective tight-binding model constructed from the individual CdGM states, and can be checked in future experiments. |
| format | Article |
| id | doaj-art-929f355d567f4048bc4fbd42bddc73b3 |
| institution | Kabale University |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-929f355d567f4048bc4fbd42bddc73b32025-08-20T03:28:43ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127707350210.1088/1367-2630/adea18Quantum interference among vortex bound states in superconductorsYi-Ming Fu0Da Wang1https://orcid.org/0000-0003-1214-6237Qiang-Hua Wang2National Laboratory of Solid State Microstructures & School of Physics, Nanjing University , Nanjing 210093, People’s Republic of ChinaNational Laboratory of Solid State Microstructures & School 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 ChinaNational Laboratory of Solid State Microstructures & School 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 ChinaIn a recent experiment (Hou et al 2025 Phys. Rev. X 15 011027), a new type of necklace-like vortex bound state (VBS) was observed and attributed to disorder induced interference among different Caroli–de Gennes–Matricon (CdGM) states within one single vortex. In this work, we further investigate the possibilities of quantum interference among the CdGM states from different vortices in clean superconductors, which may become significant near the upper critical field. We find a series of interference patterns in the local density of states (LDOS) due to the overlap between spatially separated individual CdGM states. On a vortex lattice, the interference can also lead to a necklace-like LDOS, hence, providing an alternative and intrinsic mechanism to observe the novel necklace-like, or other spatially modulated VBS more generally, in experiments. These results can be understood quite well within an effective tight-binding model constructed from the individual CdGM states, and can be checked in future experiments.https://doi.org/10.1088/1367-2630/adea18vortex bound statequantum interferenceexact diagonalizationtight-binding model |
| spellingShingle | Yi-Ming Fu Da Wang Qiang-Hua Wang Quantum interference among vortex bound states in superconductors New Journal of Physics vortex bound state quantum interference exact diagonalization tight-binding model |
| title | Quantum interference among vortex bound states in superconductors |
| title_full | Quantum interference among vortex bound states in superconductors |
| title_fullStr | Quantum interference among vortex bound states in superconductors |
| title_full_unstemmed | Quantum interference among vortex bound states in superconductors |
| title_short | Quantum interference among vortex bound states in superconductors |
| title_sort | quantum interference among vortex bound states in superconductors |
| topic | vortex bound state quantum interference exact diagonalization tight-binding model |
| url | https://doi.org/10.1088/1367-2630/adea18 |
| work_keys_str_mv | AT yimingfu quantuminterferenceamongvortexboundstatesinsuperconductors AT dawang quantuminterferenceamongvortexboundstatesinsuperconductors AT qianghuawang quantuminterferenceamongvortexboundstatesinsuperconductors |