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Published on: August 2, 2019
9.8K
Supercurrent diode effect and finite-momentum superconductors.
1Shenzhen JL Computational Science and Applied Research Institute, Shenzhen, 518109 China.
Summary
This study demonstrates finite-momentum superconductivity, enabling the supercurrent diode effect. An external magnetic field induces unequal critical currents, a key finding for superconducting devices.
Area of Science:
- Condensed matter physics
- Superconductivity research
Background:
- The supercurrent diode effect is a phenomenon in superconductivity where critical currents differ based on direction.
- Finite-momentum superconductivity is an emerging area with potential technological applications.
Purpose of the Study:
- To investigate the role of finite-momentum superconductivity in achieving the supercurrent diode effect.
- To demonstrate how external magnetic fields influence Cooper pair momentum and critical currents.
Main Methods:
- Theoretical modeling of superconducting states.
- Analysis of Cooper pair behavior under magnetic fields.
Main Results:
- Cooper pairs can acquire finite momentum when subjected to an external magnetic field.
- This momentum acquisition leads to an asymmetry in critical currents, manifesting the supercurrent diode effect.
Conclusions:
- Finite-momentum superconductivity provides a viable mechanism for the supercurrent diode effect.
- The ability to control critical current directionality has significant implications for superconducting electronics.
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