Berezinskii-Kosterlitz-Thouless transition in the type-I Weyl semimetal PtBi$_2$
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2021
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916282035601408 |
|---|---|
| author | Veyrat, Arthur Labracherie, Valentin Bashlakov, Dima L. Caglieris, Federico Facio, Jorge I. Shipunov, Grigory Charvin, Titouan Acharya, Rohith Naidyuk, Yurii Giraud, Romain Brink, Jeroen van den Büchner, Bernd Hess, Christian Aswartham, Saicharan Dufouleur, Joseph |
| author_facet | Veyrat, Arthur Labracherie, Valentin Bashlakov, Dima L. Caglieris, Federico Facio, Jorge I. Shipunov, Grigory Charvin, Titouan Acharya, Rohith Naidyuk, Yurii Giraud, Romain Brink, Jeroen van den Büchner, Bernd Hess, Christian Aswartham, Saicharan Dufouleur, Joseph |
| contents | Symmetry breaking in topological matter has become in recent years a key concept in condensed matter physics to unveil novel electronic states. In this work, we predict that broken inversion symmetry and strong spin-orbit coupling in trigonal PtBi$_2$ lead to a type-I Weyl semimetal band structure. Transport measurements show an unusually robust low dimensional superconductivity in thin exfoliated flakes up to 126 nm in thickness (with $T_c \sim 275-400$~mK), which constitutes the first report and study of unambiguous superconductivity in a type-I Weyl semimetal. Remarkably, a Berezinskii-Kosterlitz-Thouless transition with $T_\text{BKT} \sim 310$~mK is revealed in up to 60 nm thick flakes, which is nearly an order of magnitude thicker than the rare examples of two-dimensional superconductors exhibiting such a transition. This makes PtBi$_2$ an ideal platform to study low dimensional and unconventional superconductivity in topological semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2101_01620 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Berezinskii-Kosterlitz-Thouless transition in the type-I Weyl semimetal PtBi$_2$ Veyrat, Arthur Labracherie, Valentin Bashlakov, Dima L. Caglieris, Federico Facio, Jorge I. Shipunov, Grigory Charvin, Titouan Acharya, Rohith Naidyuk, Yurii Giraud, Romain Brink, Jeroen van den Büchner, Bernd Hess, Christian Aswartham, Saicharan Dufouleur, Joseph Superconductivity Mesoscale and Nanoscale Physics Materials Science Symmetry breaking in topological matter has become in recent years a key concept in condensed matter physics to unveil novel electronic states. In this work, we predict that broken inversion symmetry and strong spin-orbit coupling in trigonal PtBi$_2$ lead to a type-I Weyl semimetal band structure. Transport measurements show an unusually robust low dimensional superconductivity in thin exfoliated flakes up to 126 nm in thickness (with $T_c \sim 275-400$~mK), which constitutes the first report and study of unambiguous superconductivity in a type-I Weyl semimetal. Remarkably, a Berezinskii-Kosterlitz-Thouless transition with $T_\text{BKT} \sim 310$~mK is revealed in up to 60 nm thick flakes, which is nearly an order of magnitude thicker than the rare examples of two-dimensional superconductors exhibiting such a transition. This makes PtBi$_2$ an ideal platform to study low dimensional and unconventional superconductivity in topological semimetals. |
| title | Berezinskii-Kosterlitz-Thouless transition in the type-I Weyl semimetal PtBi$_2$ |
| topic | Superconductivity Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2101.01620 |