Quantized critical supercurrent in SrTiO 3 -based quantum point contacts
Superconductivity in SrTiO occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic gates. Here, we demonstrate nanoscale weak links connecting superconducting leads, all within a single material, SrTiO . Ionic liquid gating ac...
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Published in | Science advances Vol. 7; no. 40; p. eabi6520 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
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01.10.2021
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Abstract | Superconductivity in SrTiO
occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic gates. Here, we demonstrate nanoscale weak links connecting superconducting leads, all within a single material, SrTiO
. Ionic liquid gating accumulates carriers in the leads, and local electrostatic gates are tuned to open the weak link. These devices behave as superconducting quantum point contacts with a quantized critical supercurrent. This is a milestone toward establishing SrTiO
as a single-material platform for mesoscopic superconducting transport experiments that also intrinsically contains the necessary ingredients to engineer topological superconductivity. |
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AbstractList | Superconductivity in SrTiO
occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic gates. Here, we demonstrate nanoscale weak links connecting superconducting leads, all within a single material, SrTiO
. Ionic liquid gating accumulates carriers in the leads, and local electrostatic gates are tuned to open the weak link. These devices behave as superconducting quantum point contacts with a quantized critical supercurrent. This is a milestone toward establishing SrTiO
as a single-material platform for mesoscopic superconducting transport experiments that also intrinsically contains the necessary ingredients to engineer topological superconductivity. A superconducting quantum constriction is realized by locally screening ionic liquid gating in SrTiO 3 . Superconductivity in SrTiO 3 occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic gates. Here, we demonstrate nanoscale weak links connecting superconducting leads, all within a single material, SrTiO 3 . Ionic liquid gating accumulates carriers in the leads, and local electrostatic gates are tuned to open the weak link. These devices behave as superconducting quantum point contacts with a quantized critical supercurrent. This is a milestone toward establishing SrTiO 3 as a single-material platform for mesoscopic superconducting transport experiments that also intrinsically contains the necessary ingredients to engineer topological superconductivity. |
Author | Goldhaber-Gordon, David Mikheev, Evgeny Rosen, Ilan T |
Author_xml | – sequence: 1 givenname: Evgeny orcidid: 0000-0003-2818-5978 surname: Mikheev fullname: Mikheev, Evgeny organization: Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA – sequence: 2 givenname: Ilan T orcidid: 0000-0001-8869-7364 surname: Rosen fullname: Rosen, Ilan T organization: Department of Applied Physics, Stanford University, Stanford, CA 94305, USA – sequence: 3 givenname: David orcidid: 0000-0001-8549-0560 surname: Goldhaber-Gordon fullname: Goldhaber-Gordon, David organization: Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/34597141$$D View this record in MEDLINE/PubMed |
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Snippet | Superconductivity in SrTiO
occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic... A superconducting quantum constriction is realized by locally screening ionic liquid gating in SrTiO 3 . Superconductivity in SrTiO 3 occurs at remarkably low... |
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