Nature of the superconducting fluctuations in photoexcited systems

Multi-component Time-dependent Ginzburg–Landau Study of Photo-excitation Effects on Superconducting Fluctuation

“…[21]. The coupling between the two order parameters is given by g, and if this constant is zero, the system is reduced to the single-component model [19]. The electric current carried by Cooper pairs is given by…”

“…The concrete form of the dimensionless function H is easily derived from Eq. (19). Figure 1 (a, b) shows the excitation strength (x ∝ | A 0 |) dependence of the function H for several values of the mass imbalance parameter µ = (m 1 − m 2 )/(m 1 + m 2 ) and the asymmetry a = (a 1 − a 2 )/2Γ.…”

“…Since the enhancement is experimentally observed above transition temperature, we have studied the photo-excitation effects on the superconducting fluctuation which dominantly affects the behaviors slightly above the transition temperature [19]. Here we extend the study for the singlecomponent model to the multi-component case, whose situations are realized in e.g.…”

Dynamical control of the conductivity of an atomic Josephson junction

“…Based on microscopic models, various mechanisms have been proposed such as enhancement of electron-phonon coupling [8][9][10][11][12], control of competing order [13][14][15][16][17][18], photoinduced η-pairing [19][20][21] and cooling in multi-band systems [22,23]. Meanwhile, phenomenological approaches have been used to understand the effect of superconducting fluctuations in photo-excited systems [24][25][26][27][28][29][30][31][32]. In Refs.…”