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| Author | Hofer, J.A.; Ginzburg, M.; Bengio, S.; Haberkorn, N. | ||||
| Title | Nanocrystalline superconducting γ-Mo2N ultra-thin films for single photon detectors | Type | Journal Article | ||
| Year | 2022 | Publication | Materials Science and Engineering: B | Abbreviated Journal | Materials Science and Engineering: B |
| Volume | 275 | Issue | Pages | 115499 | |
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| Abstract | We analyze the influence of the surface passivation produced by oxides on the superconducting properties of γ-Mo2N ultra-thin films. The superconducting critical temperature of thin films grown directly on Si (100) with those using a buffer and a capping layer of AlN are compared. The results show that the cover layer avoids the presence of surface oxides, maximizing the superconducting critical temperature for films with thicknesses of a few nanometers. We characterize the flux-flow instability measuring current-voltage curves in a 6.4 nm thick Mo2N film with a superconducting critical temperature of 6.4 K. The data is analyzed using the Larkin and Ovchinnikov model. Considering self-heating effects due to finite heat removal from the substrate, we determine a fast quasiparticle relaxation time ≈ 45 ps. This value is promising for its applications in single-photon detectors. | ||||
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| ISSN | 0921-5107 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 871 | ||
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