Studies on proximity effect in Mo/Bi1.95Sb0.05Se3hybrid structure
| العنوان: | Studies on proximity effect in Mo/Bi1.95Sb0.05Se3hybrid structure |
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| المؤلفون: | T. R. Devidas, Awadhesh Mani, Shilpam Sharma, E. P. Amaladass |
| المصدر: | Journal of Physics D: Applied Physics. 49:255305 |
| بيانات النشر: | IOP Publishing, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Superconductivity, Condensed Matter - Materials Science, Materials science, Acoustics and Ultrasonics, Analytical chemistry, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coherence length, Topological insulator, 0103 physical sciences, Proximity effect (superconductivity), Cooper pair, Thin film, 010306 general physics, 0210 nano-technology, Single crystal, Critical field |
| الوصف: | Proximity effect in a mechanically exfoliated Bi1.95Sb0.05Se3 topological insulator (TI) single crystal partially covered with disordered superconducting (SC) Mo thin film is reported. Magnetotransport measurement was performed simultaneously across three different regions of the sample viz. SC, TI and SC/TI junction. Resistance measured across SC shows a TC at 4.3 K concomitantly the resistance measurement on TI showed a metallic trend with a steep upturn at TC. Magneto-resistance (MR) measurement on TI exhibit a positive MR with Shubnikov-de Haas (SdH) oscillations, whereas on SC a positive MR superimposed with steep cusp close to TC is observed. Across SC/TI junction both SdH oscillation and the cusp were observed. The frequency of SdH oscillation on SC/TI junction is found to be lesser (~ 125 T) as compared to a reference Bi1.95Sb0.05Se3sample (~ 174 T). Upper critical field HC2 deduced from WHH fit was found to be 17.14 T for a reference Mo film whereas Mo film deposited on TI showed a decreased HC2 of 4.05 T. The coherence length for the former was found to be 4.38 nm and for the latter 9.01 nm. The interaction between the spin-less Cooper pairs in SC with the spin-momentum locked carriers on the surface of TI is believed to cause such changes in transport properties. Comment: 10 pages, 5 figures |
| تدمد: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/49/25/255305 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::160eab53e61a44fc688f2c56494e6976 https://doi.org/10.1088/0022-3727/49/25/255305 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....160eab53e61a44fc688f2c56494e6976 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13616463 00223727 |
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| DOI: | 10.1088/0022-3727/49/25/255305 |