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General Conditions for Proximity-Induced Odd-Frequency Superconductivity in Two-Dimensional Electronic Systems
Christopher Triola1, Driss M Badiane2, Alexander V Balatsky1,3
1Nordita, Center for Quantum Materials, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, 10691 Stockholm, Sweden.
Physical Review Letters
|July 9, 2016
Summary
Researchers found conditions for odd-frequency superconducting pairing in 2D electronic systems. A specific heterostructure, like molybdenum disulfide with a superconductor, demonstrates this novel pairing, opening avenues for new superconducting materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Superconductivity
Background:
- Superconducting pairing is typically even-frequency.
- Odd-frequency superconductivity is a less explored but theoretically significant phenomenon.
- Proximity coupling is a known method to induce superconductivity in adjacent materials.
Purpose of the Study:
- To establish general conditions for odd-frequency superconducting pairing.
- To identify specific material systems exhibiting this pairing.
- To explore novel heterostructures for advanced superconducting applications.
Main Methods:
- Derivation of general theoretical conditions for odd-frequency pairing.
- Analysis of a two-dimensional electronic system coupled to a superconductor.
- Investigation of heterostructures involving transition metal dichalcogenides and s-wave superconductors with Rashba spin-orbit coupling.
Main Results:
- General conditions for the emergence of odd-frequency superconducting pairing were obtained.
- A heterostructure of a group VI transition metal dichalcogenide (e.g., molybdenum disulfide) and an s-wave superconductor with Rashba spin-orbit coupling was shown to exhibit odd-frequency pairing.
- Identification of a new class of van der Waals heterostructures conducive to odd-frequency superconductivity.
Conclusions:
- Odd-frequency superconducting pairing can be realized under specific conditions in 2D systems.
- Van der Waals heterostructures represent a promising platform for exploring and utilizing odd-frequency superconductivity.
- This work paves the way for discovering new superconducting phenomena and materials.
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