دورية أكاديمية
Two-gap superconductivity and topological surface states in TaOsSi
| العنوان: | Two-gap superconductivity and topological surface states in TaOsSi |
|---|---|
| المؤلفون: | Xu, C. Q., Li, B., Feng, J. J., Jiao, W. H., Li, Y. K., Liu, S. W., Zhou, Y. X., Sankar, R., Zhigadlo, Nikolai D., Wang, H. B., Han, Z. D., Qian, B., Ye, W., Zhou, W., Shiroka, T., Biswas, Pabitra K., Xu, Xiaofeng, Shi, Z. X. |
| المصدر: | Xu, C. Q.; Li, B.; Feng, J. J.; Jiao, W. H.; Li, Y. K.; Liu, S. W.; Zhou, Y. X.; Sankar, R.; Zhigadlo, Nikolai D.; Wang, H. B.; Han, Z. D.; Qian, B.; Ye, W.; Zhou, W.; Shiroka, T.; Biswas, Pabitra K.; Xu, Xiaofeng; Shi, Z. X. (2019). Two-gap superconductivity and topological surface states in TaOsSi. Physical review. B - condensed matter and materials physics, 100(13) American Physical Society 10.1103/PhysRevB.100.134503 |
| بيانات النشر: | American Physical Society |
| سنة النشر: | 2019 |
| المجموعة: | BORIS (Bern Open Repository and Information System, University of Bern) |
| مصطلحات موضوعية: | 570 Life sciences, biology, 540 Chemistry |
| الوصف: | The occurrence of superconductivity in topological materials is considered as a promising route for realizing topological superconductors, a platform able to host the long-sought Majorana fermions in condensed matter. In this work, by using electrical transport and heat-capacity measurements, as well as first-principles band-structure calculations, we investigate the physical properties of TaOsSi, a superconductor with Tc≈5.8 K. The behavior of both its upper critical field and low-temperature heat-capacity suggest the existence of two superconducting gaps. More strikingly, first-principles calculations reveal gapless topological surface states in the present material. The evolution of the electrical resistivity with pressure (up to 50 GPa) was also investigated, and a “V-shaped” diagram of Tc vs P was found. Overall, our data suggest that TaOsSi is a new system where multiband superconductivity and topological surface states coexist and, hence, it may serve as a possible candidate in the search for topological superconductivity. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://boris.unibe.ch/140677Test/ |
| الإتاحة: | https://doi.org/10.1103/PhysRevB.100.134503Test https://boris.unibe.ch/140677/1/PhysRevB.100.134503.pdfTest https://boris.unibe.ch/140677Test/ |
| حقوق: | info:eu-repo/semantics/restrictedAccess |
| رقم الانضمام: | edsbas.CDFE4BAA |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |