Muon spin rotation study of the topological superconductor SrxBi2Se3
| Autor: | A. de Visser, Anthony A. Amato, Y. K. Huang, D. Cherian, H. Leng, J. C. Orain |
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| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Physics Muon Condensed matter physics 02 engineering and technology Muon spin spectroscopy 021001 nanoscience & nanotechnology Topology 01 natural sciences Spectral line Magnetic field Crystal Condensed Matter::Superconductivity Lattice (order) 0103 physical sciences Topological order 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.054503 |
| Popis: | We report transverse-field (TF) muon spin rotation experiments on single crystals of the topological superconductor ${\mathrm{Sr}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ with nominal concentrations $x=0.15$ and 0.18 (${T}_{c}\ensuremath{\sim}3$ K). The TF spectra ($B=10$ mT), measured after cooling to below ${T}_{c}$ in field, did not show any additional damping of the muon precession signal due to the flux line lattice within the experimental uncertainty. This puts a lower bound on the magnetic penetration depth $\ensuremath{\lambda}\ensuremath{\ge}2.3\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{m}$. However, when we induce disorder in the vortex lattice by changing the magnetic field below ${T}_{c}$, a sizable damping rate is obtained for $T\ensuremath{\rightarrow}0$. The data provide microscopic evidence for a superconducting volume fraction of $\ensuremath{\sim}70%$ in the $x=0.18$ crystal and thus bulk superconductivity. |
| Databáze: | OpenAIRE |
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