Lateral imaging of the superconducting vortex lattice using Doppler-modulated scanning tunneling microscopy
arXiv:1110.4940 · doi:10.1063/1.3659412
Abstract
By spatially mapping the Doppler effect of an in-plane magnetic field on the quasiparticle tunneling spectrum, we have laterally imaged the vortex lattice in superconducting 2H-NbSe2. Cryomagnetic scanning tunneling spectroscopy was performed at 300 mK on the ab-surface oriented parallel to the field H. Conductance images at zero bias show stripe patterns running along H, with the stripe separation varying as H^-0.5. Regions of higher zero-bias conductance show lower gap-edge conductance, consistent with spectral redistribution by spatially-modulated superfluid momentum. Our results are interpreted in terms of the interaction between vortical and screening currents, and demonstrate a general method for probing subsurface vortices.
3 pages, 3 figures, to appear in Applied Physics Letters
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- Wireless Majorana Bound States: From Magnetic Tunability to Braiding
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- Supercurrent on a vortex core in 2H-NbSe: current driven scanning tunneling spectroscopy
- Subsurface bending and reorientation of tilted vortex lattices in the bulk due to Coulomb-like repulsion at the surface
- Microscopic Eilenberger theory of Fulde-Ferrell-Larkin-Ovchinnikov states in the presence of vortices
- Thermal creep emerging from cooling a tilted vortex lattice in uniaxial superconductor
- Andreev Reflection without Fermi surface alignment in High T-Topological heterostructures
- Scanning Tunneling Microscopy in high vectorial magnetic fields