Transformative opportunities in superconductor vortex physics

Aili McConnon

doi:10.1063/10.0005714

Non-Hermitian Luttinger liquids and vortex physics

EPL (Europhysics Letters) ◽

10.1209/epl/i2003-10204-2 ◽

2004 ◽

Vol 66 (2) ◽

pp. 178-184 ◽

Cited By ~ 13

Author(s):

W Hofstetter ◽

I Affleck ◽

D Nelson ◽

U Schollwöck

Keyword(s):

Luttinger Liquids ◽

Vortex Physics

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Three-dimensional spatially resolved neutron diffraction from a disordered vortex lattice

Journal of Applied Crystallography ◽

10.1107/s0021889811006790 ◽

2011 ◽

Vol 44 (2) ◽

pp. 414-417

Author(s):

Xi Wang ◽

Helen A. Hanson ◽

Xinsheng Sean Ling ◽

Charles F. Majkrzak ◽

Brian B. Maranville

Keyword(s):

Neutron Diffraction ◽

Vortex Lattice ◽

Three Dimensional ◽

Vortex State ◽

Prototype System ◽

Vortex Matter ◽

Atomic Lattice ◽

Spatially Resolved ◽

Neutron Diffraction Technique ◽

Vortex Physics

The vortex matter in bulk type II superconductors serves as a prototype system for studying the random pinning problem in condensed matter physics. Since the vortex lattice is embedded in an atomic lattice, small-angle neutron scattering (SANS) is the only technique that allows for direct structural studies. In traditional SANS methods, the scattering intensity is a measure of the structure factor averaged over the entire sample. Recent studies in vortex physics have shown that it is highly desirable to develop a SANS technique that is capable of resolving the spatial inhomogeneities in the bulk vortex state. This article reports a novel slicing neutron diffraction technique using atypical collimation and an areal detector, which allows for observing the three-dimensional disorder of the vortex matter inside an as-grown Nb single crystal.

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Signatures of new d-wave vortex physics in overdoped Tl2Ba2CuO6+x revealed by TF-µ+SR

Scientific Reports ◽

10.1038/srep14156 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 4

Author(s):

Jess H. Brewer ◽

Scott L. Stubbs ◽

Ruixing Liang ◽

D. A. Bonn ◽

W. N. Hardy ◽

...

Keyword(s):

Vortex Physics ◽

D Wave

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Magnetoresistance, Gating and Proximity Effects in Ultrathin NbN-Bi2Se3 Bilayers

10.20944/preprints201703.0049.v1 ◽

2017 ◽

Author(s):

Gad Koren

Keyword(s):

Magnetic Field ◽

High Temperature ◽

Topological Insulator ◽

Proximity Effects ◽

S Wave ◽

Flux Flow ◽

Pseudogap Phase ◽

Topological Superconductors ◽

Vortex Physics ◽

Proximity Coupling

Ultrathin Bi2Se3-NbN bilayers comprise a simple proximity system of a topological insulator and an s-wave superconductor for studying gating effects on topological superconductors. Here we report on 3 nm thick NbN layers of weakly connected superconducting islands, overlayed with 10 nm thick Bi2Se3 film which facilitates enhanced proximity coupling between them. Resistance versus temperature of the most resistive bilayers shows insulating behavior but with signs of superconductivity. We measured the magnetoresistance (MR) of these bilayers versus temperature with and without a magnetic field H normal to the wafer (MR=[R(H)-R(0)]/\{[R(H)+R(0)]/2\}), and under three electric gate-fields of 0 and ±2 MV/cm. The MR results showed a complex set of gate sensitive peaks which extended up to about 30 K. The results are discussed in terms of vortex physics, and the origin of the different MR peaks is identified and attributed to flux-flow MR in the isolated NbN islands and the different proximity regions in the Bi2Se3 cap-layer. The dominant MR peak was found to be consistent with enhanced proximity induced superconductivity in the topological edge currents regions. The high temperature MR data suggest a possible pseudogap phase or a highly extended fluctuation regime.

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