Details

Autor(en) / Beteiligte

• Leng, H
• Cherian, D
• Huang, Y K
• Orain, J-C
• Amato, A
• de Visser, A

Titel

Muon spin rotation study of the topological superconductor SrxBi2Se3

Ist Teil von

• Physical review. B, 2018-02, Vol.97 (5)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Link zum Volltext

Quelle

APS: American Physical Society E-Journals (Physics)

Beschreibungen/Notizen

• We report transverse-field (TF) muon spin rotation experiments on single crystals of the topological superconductor SrxBi2Se3 with nominal concentrations x=0.15 and 0.18 (Tc∼3 K). The TF spectra (B=10 mT), measured after cooling to below Tc 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 λ≥2.3μm. However, when we induce disorder in the vortex lattice by changing the magnetic field below Tc, a sizable damping rate is obtained for T→0. The data provide microscopic evidence for a superconducting volume fraction of ∼70% in the x=0.18 crystal and thus bulk superconductivity.