Unveiling the pairing Symmetry of the superconducting Sn/Si(111) via angle-resolved THz pump spectroscopy
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866918328020238336 |
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| author | Iannetti, Mattia Cea, Tommaso Tresca, Cesare Benfatto, Lara Profeta, Gianni |
| author_facet | Iannetti, Mattia Cea, Tommaso Tresca, Cesare Benfatto, Lara Profeta, Gianni |
| contents | Doping tin surface epitaxially grown on silicon, Sn/Si(111), with boron atoms yields the appearance of a superconducting (SC) phase below $T_c\sim 4-5$K. Even though the pairing mechanism remains unknown, experimental evidence of chiral $d-$wave superconductivity has been recently reported, then ruling out a phonon-mediated pairing. Here we study theoretically the SC phase and symmetries of the doped Sn/Si(111) within a $t-J$ model. We analyze the photo-excitation of the system by intense THz pulses and show that the polarization dependence of the induced current can distinguish between different symmetries of the SC gap, thus providing a novel experimental mean to investigate the spectroscopic features of the Sn/Si(111) across the SC transition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_14355 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Unveiling the pairing Symmetry of the superconducting Sn/Si(111) via angle-resolved THz pump spectroscopy Iannetti, Mattia Cea, Tommaso Tresca, Cesare Benfatto, Lara Profeta, Gianni Superconductivity Doping tin surface epitaxially grown on silicon, Sn/Si(111), with boron atoms yields the appearance of a superconducting (SC) phase below $T_c\sim 4-5$K. Even though the pairing mechanism remains unknown, experimental evidence of chiral $d-$wave superconductivity has been recently reported, then ruling out a phonon-mediated pairing. Here we study theoretically the SC phase and symmetries of the doped Sn/Si(111) within a $t-J$ model. We analyze the photo-excitation of the system by intense THz pulses and show that the polarization dependence of the induced current can distinguish between different symmetries of the SC gap, thus providing a novel experimental mean to investigate the spectroscopic features of the Sn/Si(111) across the SC transition. |
| title | Unveiling the pairing Symmetry of the superconducting Sn/Si(111) via angle-resolved THz pump spectroscopy |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2311.14355 |