Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport
Low-temperature (down to ∼50 mK) thermal conductivity measurements with the heat flow direction along the interplane tetragonal c axis, κ_{c}, were used to study the superconducting state of heavy fermion CeIrIn_{5}. Measurements were performed in the magnetic fields both parallel to the heat flow d...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2022-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.013192 |
| _version_ | 1797210800019996672 |
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| author | H. Shakeripour M. A. Tanatar C. Petrovic Louis Taillefer |
| author_facet | H. Shakeripour M. A. Tanatar C. Petrovic Louis Taillefer |
| author_sort | H. Shakeripour |
| collection | DOAJ |
| description | Low-temperature (down to ∼50 mK) thermal conductivity measurements with the heat flow direction along the interplane tetragonal c axis, κ_{c}, were used to study the superconducting state of heavy fermion CeIrIn_{5}. Measurements were performed in the magnetic fields both parallel to the heat flow direction H∥c, and transverse to it H∥a. Interplane heat conductivity in H∥c configuration shows negligible initial increase with magnetic field and a rapid rise on approaching H_{c2} from below, similar to the expectations for the superconducting gap without line nodes. This observation is in stark contrast to monotonic increase found in the previous in-plane heat transport measurements. In the configuration with the magnetic field breaking the tetragonal symmetry of the lattice H∥a, κ_{c} reveals nonmonotonic evolution with temperature and magnetic field suggesting subphase boundary in the superconducting state. The characteristic temperature T_{kink}∼ 0.07 K of the subboundary is well within the domain of bulk superconductivity T_{c}∼ 0.4 K and H_{c2}∼ 1.0 T. These results are consistent with a superconducting gap with an equatorial line node and polar point nodes, a gap symmetry of the D_{4h} point group, for which magnetic field along the tetragonal plane breaks the degeneracy of the multicomponent order parameter and induces a phase transition with nodal topology change. |
| first_indexed | 2024-04-24T10:16:21Z |
| format | Article |
| id | doaj.art-88be3bead3724239acb83304445cb42d |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:16:21Z |
| publishDate | 2022-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-88be3bead3724239acb83304445cb42d2024-04-12T17:18:49ZengAmerican Physical SocietyPhysical Review Research2643-15642022-03-014101319210.1103/PhysRevResearch.4.013192Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transportH. ShakeripourM. A. TanatarC. PetrovicLouis TailleferLow-temperature (down to ∼50 mK) thermal conductivity measurements with the heat flow direction along the interplane tetragonal c axis, κ_{c}, were used to study the superconducting state of heavy fermion CeIrIn_{5}. Measurements were performed in the magnetic fields both parallel to the heat flow direction H∥c, and transverse to it H∥a. Interplane heat conductivity in H∥c configuration shows negligible initial increase with magnetic field and a rapid rise on approaching H_{c2} from below, similar to the expectations for the superconducting gap without line nodes. This observation is in stark contrast to monotonic increase found in the previous in-plane heat transport measurements. In the configuration with the magnetic field breaking the tetragonal symmetry of the lattice H∥a, κ_{c} reveals nonmonotonic evolution with temperature and magnetic field suggesting subphase boundary in the superconducting state. The characteristic temperature T_{kink}∼ 0.07 K of the subboundary is well within the domain of bulk superconductivity T_{c}∼ 0.4 K and H_{c2}∼ 1.0 T. These results are consistent with a superconducting gap with an equatorial line node and polar point nodes, a gap symmetry of the D_{4h} point group, for which magnetic field along the tetragonal plane breaks the degeneracy of the multicomponent order parameter and induces a phase transition with nodal topology change.http://doi.org/10.1103/PhysRevResearch.4.013192 |
| spellingShingle | H. Shakeripour M. A. Tanatar C. Petrovic Louis Taillefer Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport Physical Review Research |
| title | Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport |
| title_full | Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport |
| title_fullStr | Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport |
| title_full_unstemmed | Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport |
| title_short | Subphases in the superconducting state of CeIrIn_{5} revealed by low-temperature c-axis heat transport |
| title_sort | subphases in the superconducting state of ceirin 5 revealed by low temperature c axis heat transport |
| url | http://doi.org/10.1103/PhysRevResearch.4.013192 |
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