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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures

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Correlation-induced superconductivity dynamically stabilized and enhanced by laser irradiation.

Kota Ido¹, Takahiro Ohgoe¹, Masatoshi Imada¹

¹Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Science Advances

|August 25, 2017

Summary

Laser irradiation enhances superconductivity in correlated electron systems by boosting carrier attraction and stabilizing the superconducting state dynamically. This approach offers a novel route to high-temperature superconductivity beyond equilibrium limitations.

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Area of Science:

Condensed matter physics
Materials science

Background:

Out-of-equilibrium dynamics offer new states of matter.
Room-temperature superconductor-like properties in copper oxides inspire new strategies.
Laser excitation of phonon modes is a recent advancement.

Purpose of the Study:

To investigate laser irradiation as a general strategy for enhancing superconductivity in correlated electron systems.
To elucidate the mechanisms behind laser-induced superconductivity enhancement.
To explore dynamic stabilization of superconductivity beyond equilibrium conditions.

Main Methods:

Applying laser irradiation to correlated electron systems.
Analyzing the enhancement of effective attractive carrier interaction via dynamical localization.
Investigating dynamic stabilization of superconductivity against equilibrium inhomogeneities.

Main Results:

Laser irradiation enhances superconductivity through two primary mechanisms.
Dynamical localization mechanism increases effective attractive carrier interaction.
Uniform and enhanced superconductivity is dynamically stabilized, avoiding equilibrium suppression.

Conclusions:

Laser irradiation provides a viable pathway to enhance superconductivity in strongly correlated electron systems.
Dynamically stabilized superconductivity, including Higgs oscillations, is achievable.
This method opens avenues for achieving superconductivity inaccessible in equilibrium states.