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Drastic enhancement of the thermal Hall angle in a d-wave superconductor
| Title: | Drastic enhancement of the thermal Hall angle in a d-wave superconductor |
| Authors: | Ueki, Hikaru Browse this author | | Morita, Hiroki Browse this author | | Ohuchi, Marie Browse this author | | Kita, Takafumi Browse this author →KAKEN DB |
| Issue Date: | 20-May-2020 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 101 |
| Issue: | 18 |
| Start Page: | 184518 |
| Publisher DOI: | 10.1103/PhysRevB.101.184518 |
| Abstract: | A drastic enhancement of the thermal Hall angle in d-wave superconductors was observed experimentally in a cuprate superconductor and in CeCoIn5 at low temperatures and very weak magnetic field [Phys. Rev. Lett. 86, 890 (2001); Phys. Rev. B 72, 214515 (2005)]. However, to the best of our knowledge, its microscopic calculation has not been performed yet. To study this microscopically, we derive the thermal Hall coefficient in extreme type-II superconductors with an isolated pinned vortex based on the augmented quasiclassical equations of superconductivity with the Lorentz force. Using it, we can confirm that the quasiparticle relaxation time and the thermal Hall angle are enhanced in d-wave superconductors without impurities of the resonant scattering because quasiparticles around the gap nodes which become dominant near zero temperature are restricted to the momentum in a specific orientation. This enhancement of the thermal Hall angle may also be observed in other nodal superconductors with large magnetic-penetration depth. |
| Rights: | ©2020 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/78777 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 北 孝文
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