%0 Journal Article %1 noauthororeditor %A Veyrat, Arthur %A Labracherie, Valentin %A Bashlakov, Dima L. %A Caglieris, Federico %A Facio, Jorge I. %A Shipunov, Grigory %A Charvin, Titouan %A Acharya, Rohith %A Naidyuk, Yurii %A Giraud, Romain %A van den Brink, Jeroen %A Büchner, Bernd %A Hess, Christian %A Aswartham, Saicharan %A Dufouleur, Joseph %D 2023 %I American Chemical Society %J Nano Lett. %K a b %N 4 %P 1229-1235 %R 10.1021/acs.nanolett.2c04297 %T Berezinskii–Kosterlitz–Thouless transition in the type-I Weyl semimetal PtBi$_2$ %U https://doi.org/10.1021/acs.nanolett.2c04297 %V 23 %X 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 PtBi2 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 Tc ∼ 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 TBKT ∼ 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 PtBi2 an ideal platform to study low dimensional and unconventional superconductivity in topological semimetals.

@article{noauthororeditor, abstract = {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 PtBi2 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 Tc ∼ 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 TBKT ∼ 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 PtBi2 an ideal platform to study low dimensional and unconventional superconductivity in topological semimetals.}, added-at = {2023-06-21T14:17:59.000+0200}, author = {Veyrat, Arthur and Labracherie, Valentin and Bashlakov, Dima L. and Caglieris, Federico and Facio, Jorge I. and Shipunov, Grigory and Charvin, Titouan and Acharya, Rohith and Naidyuk, Yurii and Giraud, Romain and van den Brink, Jeroen and Büchner, Bernd and Hess, Christian and Aswartham, Saicharan and Dufouleur, Joseph}, biburl = {https://www.bibsonomy.org/bibtex/23211441630276f95dd67fbab75b68301/ctqmat}, day = 31, description = {Berezinskii–Kosterlitz–Thouless transition in the type-I Weyl semimetal PtBi2 }, doi = {10.1021/acs.nanolett.2c04297}, interhash = {abcaf9e254d318af9673d96f7aae49fd}, intrahash = {3211441630276f95dd67fbab75b68301}, issn = {1530-6984}, journal = {Nano Lett.}, keywords = {a b}, month = {01}, number = 4, pages = {1229-1235}, publisher = {American Chemical Society}, timestamp = {2024-02-23T11:13:50.000+0100}, title = {Berezinskii–Kosterlitz–Thouless transition in the type-I Weyl semimetal PtBi$_{\mathbf{2}}$}, url = {https://doi.org/10.1021/acs.nanolett.2c04297}, volume = 23, year = 2023 }