High-efficiency thermal switch based on topological Josephson junctions
We propose theoretically a thermal switch operating by the magnetic-flux controlled diffraction of phase-coherent heat currents in a thermally biased Josephson junction based on a two-dimensional topological insulator. For short junctions, the system shows a sharp switching behavior while for long j...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa60d4 |
| _version_ | 1827873527838015488 |
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| author | Björn Sothmann Francesco Giazotto Ewelina M Hankiewicz |
| author_facet | Björn Sothmann Francesco Giazotto Ewelina M Hankiewicz |
| author_sort | Björn Sothmann |
| collection | DOAJ |
| description | We propose theoretically a thermal switch operating by the magnetic-flux controlled diffraction of phase-coherent heat currents in a thermally biased Josephson junction based on a two-dimensional topological insulator. For short junctions, the system shows a sharp switching behavior while for long junctions the switching is smooth. Physically, the switching arises from the Doppler shift of the superconducting condensate due to screening currents induced by a magnetic flux. We suggest a possible experimental realization that exhibits a relative temperature change of 40% between the on and off state for realistic parameters. This is a factor of two larger than in recently realized thermal modulators based on conventional superconducting tunnel junctions. |
| first_indexed | 2024-03-12T16:39:20Z |
| format | Article |
| id | doaj.art-445561a0a5324f288734e0b716097fde |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:39:20Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-445561a0a5324f288734e0b716097fde2023-08-08T14:36:29ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119202305610.1088/1367-2630/aa60d4High-efficiency thermal switch based on topological Josephson junctionsBjörn Sothmann0Francesco Giazotto1Ewelina M Hankiewicz2Theoretische Physik, Universität Duisburg-Essen and CENIDE , D-47048 Duisburg, Germany; Institute for Theoretical Physics and Astrophysics, University of Würzburg , Am Hubland, D-97074 Würzburg, GermanyNEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore , I-56127 Pisa, ItalyInstitute for Theoretical Physics and Astrophysics, University of Würzburg , Am Hubland, D-97074 Würzburg, GermanyWe propose theoretically a thermal switch operating by the magnetic-flux controlled diffraction of phase-coherent heat currents in a thermally biased Josephson junction based on a two-dimensional topological insulator. For short junctions, the system shows a sharp switching behavior while for long junctions the switching is smooth. Physically, the switching arises from the Doppler shift of the superconducting condensate due to screening currents induced by a magnetic flux. We suggest a possible experimental realization that exhibits a relative temperature change of 40% between the on and off state for realistic parameters. This is a factor of two larger than in recently realized thermal modulators based on conventional superconducting tunnel junctions.https://doi.org/10.1088/1367-2630/aa60d4topological superconductivitytopological insulatorphase-coherent caloritronicsJosephson junction |
| spellingShingle | Björn Sothmann Francesco Giazotto Ewelina M Hankiewicz High-efficiency thermal switch based on topological Josephson junctions New Journal of Physics topological superconductivity topological insulator phase-coherent caloritronics Josephson junction |
| title | High-efficiency thermal switch based on topological Josephson junctions |
| title_full | High-efficiency thermal switch based on topological Josephson junctions |
| title_fullStr | High-efficiency thermal switch based on topological Josephson junctions |
| title_full_unstemmed | High-efficiency thermal switch based on topological Josephson junctions |
| title_short | High-efficiency thermal switch based on topological Josephson junctions |
| title_sort | high efficiency thermal switch based on topological josephson junctions |
| topic | topological superconductivity topological insulator phase-coherent caloritronics Josephson junction |
| url | https://doi.org/10.1088/1367-2630/aa60d4 |
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