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Andreev bound states and their signatures
J A Sauls1,2
1Fermilab-Northwestern Center for Applied Physics and Superconducting Technologies, Northwestern University, Evanston, IL, USA sauls@northwestern.edu.
Summary
Andreev bound states form in inhomogeneous superconductors, revealing quantum coherence properties. These sub-gap states, arising from Andreev reflection, are crucial for understanding unconventional superconductivity and topological phases.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
Background:
- Superconducting properties related to quantum coherence are observed when the superconducting state is spatially varied.
- Andreev reflection, the retro-reflection of an electron into a hole at a normal-superconducting interface, is a key phenomenon.
- Inhomogeneous superconductors exhibit unique phenomena due to spatial variations.
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