Superfluid response of an atomically thin gate-tuned van der Waals superconductor
Abstract A growing number of two-dimensional superconductors are being discovered in the family of exfoliated van der Waals materials. Due to small sample volume, the superfluid response of these materials has not been characterized. Here, we use a local magnetic probe to directly measure this key p...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-04-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-37210-8 |
| _version_ | 1797845912438964224 |
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| author | Alexander Jarjour G. M. Ferguson Brian T. Schaefer Menyoung Lee Yen Lee Loh Nandini Trivedi Katja C. Nowack |
| author_facet | Alexander Jarjour G. M. Ferguson Brian T. Schaefer Menyoung Lee Yen Lee Loh Nandini Trivedi Katja C. Nowack |
| author_sort | Alexander Jarjour |
| collection | DOAJ |
| description | Abstract A growing number of two-dimensional superconductors are being discovered in the family of exfoliated van der Waals materials. Due to small sample volume, the superfluid response of these materials has not been characterized. Here, we use a local magnetic probe to directly measure this key property of the tunable, gate-induced superconducting state in MoS2. We find that the backgate changes the transition temperature non-monotonically whereas the superfluid stiffness at low temperature and the normal state conductivity monotonically increase. In some devices, we find direct signatures in agreement with a Berezinskii-Kosterlitz-Thouless transition, whereas in others we find a broadened onset of the superfluid response. We show that the observed behavior is consistent with disorder playing an important role in determining the properties of superconducting MoS2. Our work demonstrates that magnetic property measurements are within reach for superconducting devices based on exfoliated sheets and reveals that the superfluid response significantly deviates from simple BCS-like behavior. |
| first_indexed | 2024-04-09T17:46:38Z |
| format | Article |
| id | doaj.art-e9db841f2a954ce083d6da56494709a6 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-09T17:46:38Z |
| publishDate | 2023-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-e9db841f2a954ce083d6da56494709a62023-04-16T11:18:31ZengNature PortfolioNature Communications2041-17232023-04-011411810.1038/s41467-023-37210-8Superfluid response of an atomically thin gate-tuned van der Waals superconductorAlexander Jarjour0G. M. Ferguson1Brian T. Schaefer2Menyoung Lee3Yen Lee Loh4Nandini Trivedi5Katja C. Nowack6Laboratory of Atomic and Solid State Physics, Cornell UniversityLaboratory of Atomic and Solid State Physics, Cornell UniversityLaboratory of Atomic and Solid State Physics, Cornell UniversityKavli Institute at Cornell for Nanoscale ScienceDepartment of Physics and Astrophysics, University of North DakotaDepartment of Physics, The Ohio State UniversityLaboratory of Atomic and Solid State Physics, Cornell UniversityAbstract A growing number of two-dimensional superconductors are being discovered in the family of exfoliated van der Waals materials. Due to small sample volume, the superfluid response of these materials has not been characterized. Here, we use a local magnetic probe to directly measure this key property of the tunable, gate-induced superconducting state in MoS2. We find that the backgate changes the transition temperature non-monotonically whereas the superfluid stiffness at low temperature and the normal state conductivity monotonically increase. In some devices, we find direct signatures in agreement with a Berezinskii-Kosterlitz-Thouless transition, whereas in others we find a broadened onset of the superfluid response. We show that the observed behavior is consistent with disorder playing an important role in determining the properties of superconducting MoS2. Our work demonstrates that magnetic property measurements are within reach for superconducting devices based on exfoliated sheets and reveals that the superfluid response significantly deviates from simple BCS-like behavior.https://doi.org/10.1038/s41467-023-37210-8 |
| spellingShingle | Alexander Jarjour G. M. Ferguson Brian T. Schaefer Menyoung Lee Yen Lee Loh Nandini Trivedi Katja C. Nowack Superfluid response of an atomically thin gate-tuned van der Waals superconductor Nature Communications |
| title | Superfluid response of an atomically thin gate-tuned van der Waals superconductor |
| title_full | Superfluid response of an atomically thin gate-tuned van der Waals superconductor |
| title_fullStr | Superfluid response of an atomically thin gate-tuned van der Waals superconductor |
| title_full_unstemmed | Superfluid response of an atomically thin gate-tuned van der Waals superconductor |
| title_short | Superfluid response of an atomically thin gate-tuned van der Waals superconductor |
| title_sort | superfluid response of an atomically thin gate tuned van der waals superconductor |
| url | https://doi.org/10.1038/s41467-023-37210-8 |
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