@article {liu2018,
	title = {Radiation-Induced Oscillating Gap States of Nonequilibrium Two-Dimensional Superconductors},
	journal = {Chinese Phys. Lett.},
	volume = {35},
	number = {6},
	year = {2018},
	pages = {067401},
	abstract = {We study the effects of infrared radiation on a two-dimensional Bardeen{\textendash}Cooper{\textendash}Schrieffer superconductor coupled with a normal metal substrate through a tunneling barrier. The phase transition is analyzed by inspecting the stability of the system against perturbations of pairing potentials. We find an oscillating gap phase with a frequency not directly related to the radiation frequency, but instead resulting from the asymmetry of electron density of states of the system as well as the tunneling amplitude. When such a superconductor is in contact with another superconductor, gives rise to an unusual alternating Josephson current .},
	issn = {0256-307X},
	doi = {10.1088/0256-307X/35/6/067401},
	author = {Liu, Hui-Ying and Jun-Ren Shi}
}
