Photon drag of superconducting fluctuations in 2D systems

TL;DR

This paper develops a theory for photon drag caused by superconducting fluctuations in 2D electron systems, showing a significant increase in effect magnitude at lower temperatures, potentially observable experimentally.

Contribution

It introduces a theoretical framework for photon drag in 2D superconducting fluctuations, highlighting a distinct temperature dependence and magnitude enhancement over conventional effects.

Findings

Photon drag current increases dramatically as temperature decreases.

The effect's frequency dependence resembles that of conventional 2D electron gases.

Predicted effect magnitude is sufficient for experimental detection.

Abstract

The theory of photon drag of superconducting fluctuations in the two-dimensional electron gas is developed. It is shown that the frequency dependence of the induced current is qualitatively similar to the case of photon drag of conventional two-dimensional degenerate electron gas. With the decreasing temperature the magnitude of the effect increases dramatically and the current of superconducting fluctuations carries an additional power of reduced temperature in comparison with the Aslamazov-Larkin contribution. The magnitude of the developed effect is expected sufficient to be visible against the conventional photocurrent background.