Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub>
Recent theories of Sr<sub>2</sub>RuO<sub>4</sub> based on the interplay of strong interactions, spin-orbit coupling and multi-band anisotropy predict chiral or helical ground states with strong anisotropy of the pairing states, with deep minima in the excitation gap, as well...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-06-01
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| Series: | Frontiers in Physics |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fphy.2015.00036/full |
| _version_ | 1818962967799005184 |
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| author | James Avery Sauls Hao eWu Suk Bum eChung |
| author_facet | James Avery Sauls Hao eWu Suk Bum eChung |
| author_sort | James Avery Sauls |
| collection | DOAJ |
| description | Recent theories of Sr<sub>2</sub>RuO<sub>4</sub> based on the interplay of strong interactions, spin-orbit coupling and multi-band anisotropy predict chiral or helical ground states with strong anisotropy of the pairing states, with deep minima in the excitation gap, as well as strong phase anisotropy for the chiral ground state. We develop time-dependent mean field theory to calculate the Bosonic spectrum for the class of 2D chiral superconductors spanning 3He-A to chiral superconductors with strong anisotropy. Chiral superconductors support a pair of massive Bosonic excitations of the time-reversed pairs labeled by their parity under charge conjugation. These modes are degenerate for 2D <sup>3</sup>He-A. Crystal field anisotropy lifts the degeneracy. Strong anisotropy also leads to low-lying Fermions, and thus to channels for the decay of the Bosonic modes. Selection rules and phase space considerations lead to large asymmetries in the lifetimes and hybridization of the Bosonic modes with the continuum of un-bound Fermion pairs. We also highlight results for the excitation of the Bosonic modes by microwave radiation that provide clear signatures of the Bosonic modes of an anisotropic chiral ground state. |
| first_indexed | 2024-12-20T12:37:44Z |
| format | Article |
| id | doaj.art-0a473b1ff05e41168bfa6dbfc0084526 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-20T12:37:44Z |
| publishDate | 2015-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-0a473b1ff05e41168bfa6dbfc00845262022-12-21T19:40:34ZengFrontiers Media S.A.Frontiers in Physics2296-424X2015-06-01310.3389/fphy.2015.00036140156Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub>James Avery Sauls0Hao eWu1Suk Bum eChung2Northwestern UniversityNorthwestern UniversitySeoul National UniversityRecent theories of Sr<sub>2</sub>RuO<sub>4</sub> based on the interplay of strong interactions, spin-orbit coupling and multi-band anisotropy predict chiral or helical ground states with strong anisotropy of the pairing states, with deep minima in the excitation gap, as well as strong phase anisotropy for the chiral ground state. We develop time-dependent mean field theory to calculate the Bosonic spectrum for the class of 2D chiral superconductors spanning 3He-A to chiral superconductors with strong anisotropy. Chiral superconductors support a pair of massive Bosonic excitations of the time-reversed pairs labeled by their parity under charge conjugation. These modes are degenerate for 2D <sup>3</sup>He-A. Crystal field anisotropy lifts the degeneracy. Strong anisotropy also leads to low-lying Fermions, and thus to channels for the decay of the Bosonic modes. Selection rules and phase space considerations lead to large asymmetries in the lifetimes and hybridization of the Bosonic modes with the continuum of un-bound Fermion pairs. We also highlight results for the excitation of the Bosonic modes by microwave radiation that provide clear signatures of the Bosonic modes of an anisotropic chiral ground state.http://journal.frontiersin.org/Journal/10.3389/fphy.2015.00036/fullChiralitymicrowave spectroscopySuperconductivitySuperfluid 3HeCollective ModesGinzburg-Landau Theory |
| spellingShingle | James Avery Sauls Hao eWu Suk Bum eChung Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> Frontiers in Physics Chirality microwave spectroscopy Superconductivity Superfluid 3He Collective Modes Ginzburg-Landau Theory |
| title | Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> |
| title_full | Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> |
| title_fullStr | Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> |
| title_full_unstemmed | Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> |
| title_short | Anisotropy and Strong-Coupling Effects on the Collective Mode Spectrum of Chiral Superconductors: Application to Sr<sub>2</sub>RuO<sub>4</sub> |
| title_sort | anisotropy and strong coupling effects on the collective mode spectrum of chiral superconductors application to sr lt sub gt 2 lt sub gt ruo lt sub gt 4 lt sub gt |
| topic | Chirality microwave spectroscopy Superconductivity Superfluid 3He Collective Modes Ginzburg-Landau Theory |
| url | http://journal.frontiersin.org/Journal/10.3389/fphy.2015.00036/full |
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