Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates
We study the consequences of an electron–phonon (e–ph) interaction that is strongly peaked in the forward scattering ( ${\bf{q}}=0$ ) direction in a two-dimensional superconductor using Migdal–Eliashberg theory. We find that strong forward scattering results in an enhanced T _c that is linearly prop...
| 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/10.1088/1367-2630/18/2/022001 |
| _version_ | 1797750862334918656 |
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| author | Louk Rademaker Yan Wang Tom Berlijn Steve Johnston |
| author_facet | Louk Rademaker Yan Wang Tom Berlijn Steve Johnston |
| author_sort | Louk Rademaker |
| collection | DOAJ |
| description | We study the consequences of an electron–phonon (e–ph) interaction that is strongly peaked in the forward scattering ( ${\bf{q}}=0$ ) direction in a two-dimensional superconductor using Migdal–Eliashberg theory. We find that strong forward scattering results in an enhanced T _c that is linearly proportional to the strength of the dimensionless e–ph coupling constant ${\lambda }_{m}$ in the weak coupling limit. This interaction also produces distinct replica bands in the single-particle spectral function, similar to those observed in recent angle-resolved photoemission experiments on FeSe monolayers on SrTiO _3 and BaTiO _3 substrates. By comparing our model to photoemission experiments, we infer an e–ph coupling strength that can provide a significant portion of the observed high T _c in these systems. |
| first_indexed | 2024-03-12T16:38:59Z |
| format | Article |
| id | doaj.art-e63341816cea4201a08c1f82cff47d1f |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:38:59Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-e63341816cea4201a08c1f82cff47d1f2023-08-08T14:37:54ZengIOP PublishingNew Journal of Physics1367-26302016-01-0118202200110.1088/1367-2630/18/2/022001Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substratesLouk Rademaker0Yan Wang1Tom Berlijn2Steve Johnston3Kavli Institute for Theoretical Physics, University of California Santa Barbara , CA 93106, USADepartment of Physics and Astronomy, University of Tennessee , Knoxville, TN 37996, USACenter for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, TN 37831, USA; Computer Science and Mathematics Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831, USADepartment of Physics and Astronomy, University of Tennessee , Knoxville, TN 37996, USAWe study the consequences of an electron–phonon (e–ph) interaction that is strongly peaked in the forward scattering ( ${\bf{q}}=0$ ) direction in a two-dimensional superconductor using Migdal–Eliashberg theory. We find that strong forward scattering results in an enhanced T _c that is linearly proportional to the strength of the dimensionless e–ph coupling constant ${\lambda }_{m}$ in the weak coupling limit. This interaction also produces distinct replica bands in the single-particle spectral function, similar to those observed in recent angle-resolved photoemission experiments on FeSe monolayers on SrTiO _3 and BaTiO _3 substrates. By comparing our model to photoemission experiments, we infer an e–ph coupling strength that can provide a significant portion of the observed high T _c in these systems.https://doi.org/10.1088/1367-2630/18/2/022001superconductivityelectron-phonon interactionsEliashberg theoryFeSe thin films |
| spellingShingle | Louk Rademaker Yan Wang Tom Berlijn Steve Johnston Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates New Journal of Physics superconductivity electron-phonon interactions Eliashberg theory FeSe thin films |
| title | Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates |
| title_full | Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates |
| title_fullStr | Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates |
| title_full_unstemmed | Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates |
| title_short | Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates |
| title_sort | enhanced superconductivity due to forward scattering in fese thin films on srtio3 substrates |
| topic | superconductivity electron-phonon interactions Eliashberg theory FeSe thin films |
| url | https://doi.org/10.1088/1367-2630/18/2/022001 |
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