Effect of disorder on the competition between nematic and superconducting order in FeSe
Crystalline FeSe is known to display strong nematic order below a weak tetragonal-orthorhombic structural transition around ${T}_{s}\sim 90$ K, and a superconducting transition at ${T}_{c}\sim 9\,{\rm{K}}$ . Recently, it was shown that electron irradiation, which creates pointlike potential scatteri...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/18/10/103001 |
| _version_ | 1797751024606248960 |
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| author | V Mishra P J Hirschfeld |
| author_facet | V Mishra P J Hirschfeld |
| author_sort | V Mishra |
| collection | DOAJ |
| description | Crystalline FeSe is known to display strong nematic order below a weak tetragonal-orthorhombic structural transition around ${T}_{s}\sim 90$ K, and a superconducting transition at ${T}_{c}\sim 9\,{\rm{K}}$ . Recently, it was shown that electron irradiation, which creates pointlike potential scattering defects, has the surprising effect of enhancing T _c while suppressing T _s . Here we discuss a possible scenario for such an effect, which postulates a competition between ${s}_{\pm }$ superconductivity and nematic order. The transition to the nematic state is modeled by a mean field theory of a d -wave Pomeranchuk instability, together with a Cooper pairing interaction in both one- and multiband models. The effect of nonmagnetic impurities on both orders is treated on equal footing within the Born approximation. We find evidence that disorder can indeed enhance T _c while suppressing the competing nematic order, but only in a multiband situation. We discuss our results in the context of experimental data on FeSe crystals. |
| first_indexed | 2024-03-12T16:42:21Z |
| format | Article |
| id | doaj.art-4a448e8107d74044a86df72479a9cf83 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:21Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-4a448e8107d74044a86df72479a9cf832023-08-08T14:24:03ZengIOP PublishingNew Journal of Physics1367-26302016-01-01181010300110.1088/1367-2630/18/10/103001Effect of disorder on the competition between nematic and superconducting order in FeSeV Mishra0P J Hirschfeld1Computer Science and Mathematics Division , Oak Ridge National Laboratory, Oak Ridge, TN 37831, USADepartment of Physics, University of Florida , Gainesville, FL 32611, USACrystalline FeSe is known to display strong nematic order below a weak tetragonal-orthorhombic structural transition around ${T}_{s}\sim 90$ K, and a superconducting transition at ${T}_{c}\sim 9\,{\rm{K}}$ . Recently, it was shown that electron irradiation, which creates pointlike potential scattering defects, has the surprising effect of enhancing T _c while suppressing T _s . Here we discuss a possible scenario for such an effect, which postulates a competition between ${s}_{\pm }$ superconductivity and nematic order. The transition to the nematic state is modeled by a mean field theory of a d -wave Pomeranchuk instability, together with a Cooper pairing interaction in both one- and multiband models. The effect of nonmagnetic impurities on both orders is treated on equal footing within the Born approximation. We find evidence that disorder can indeed enhance T _c while suppressing the competing nematic order, but only in a multiband situation. We discuss our results in the context of experimental data on FeSe crystals.https://doi.org/10.1088/1367-2630/18/10/103001superconductivitynematic orderdisorder effect |
| spellingShingle | V Mishra P J Hirschfeld Effect of disorder on the competition between nematic and superconducting order in FeSe New Journal of Physics superconductivity nematic order disorder effect |
| title | Effect of disorder on the competition between nematic and superconducting order in FeSe |
| title_full | Effect of disorder on the competition between nematic and superconducting order in FeSe |
| title_fullStr | Effect of disorder on the competition between nematic and superconducting order in FeSe |
| title_full_unstemmed | Effect of disorder on the competition between nematic and superconducting order in FeSe |
| title_short | Effect of disorder on the competition between nematic and superconducting order in FeSe |
| title_sort | effect of disorder on the competition between nematic and superconducting order in fese |
| topic | superconductivity nematic order disorder effect |
| url | https://doi.org/10.1088/1367-2630/18/10/103001 |
| work_keys_str_mv | AT vmishra effectofdisorderonthecompetitionbetweennematicandsuperconductingorderinfese AT pjhirschfeld effectofdisorderonthecompetitionbetweennematicandsuperconductingorderinfese |