Magnetic-Field Effects on the Size of Vortices below the Surface ofNbSe2Detected Using Low Energyβ-NMR

2007/03/07 by Z. Salman, D. Wang, K. H. Chow +12 · 4 citations
Engineering · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #Superconducting Materials and Applications #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.98.167001

published as Phys. Rev. Lett. 98, 167001 (2007) · 5 pages, 3 figures. Submitted to Phys. Rev. Lett

arxiv created 2007/03/07 · openalex publication_date 2007/04/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

A low energy radioactive beam of polarized 8Li has been used to observe the vortex lattice near the surface of superconducting NbSe2. The inhomogeneous magnetic-field distribution associated with the vortex lattice was measured using depth-resolved beta-detected NMR. Below Tc, one observes the characteristic line shape for a triangular vortex lattice which depends on the magnetic penetration depth and vortex core radius. The size of the vortex core varies strongly with the magnetic field. In particular, in a low field of 10.8 mT, the core radius is much larger than the coherence length. The possible origin of these giant vortices is discussed.

Citations

• -detected NMR of 8Li in the normal state of 2H-

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