J. M. Graybeal

Effect of thermal phase fluctuations on the superfluid density of two-dimensional superconducting films

High precision measurements of the complex sheet conductivity of superconducting a-Mo77Ge23 thin films have been made from 0.4 K through T(c). A sharp drop in the inverse sheet inductance, L-1(T), is observed at a temperature, T(c), which lies below the mean-field transition temperature T(c0). Just below T(c), the suppression of L-1(T) below its mean-field value indicates that longitudinal phase fluctuations have nearly their full classical amplitude, but they disappear rapidly as T decreases. We argue that there is a quantum crossover at about 0.94T(c0), below which classical phase fluctuations are suppressed.

Unusual thickness dependence of the superconducting transition of α-MoGe thin films

Thin films of

Electronic Excitations in Undoped and Lightly Oxygen Doped La2CuO4+y

\ensuremath{\alpha}\text{-MoGe}

MIDINFRARED OPTICAL EXCITATIONS IN UNDOPED LAMELLAR COPPER OXIDES

show progressively reduced

Optical properties of single-crystal Sr2CuO2Cl2

{T}_{c}

Coupled magnon-phonon excitations in Sr 2 CuCl 2 O 2 at high pressure

s as the thickness is decreased below 30 nm and the sheet resistance exceeds

Midinfrared electroreflectance in La2CuO4+y.

100\text{ }\ensuremath{\Omega}/◻

Dynamic impedance of two-dimensional superconducting films near the superconducting transition

. We have performed far-infrared transmission and reflection measurements for a set of

Optical properties ofLa2Cu1−xLixO4in the midinfrared

\ensuremath{\alpha}\text{-MoGe}

Optical properties of La2Cu1-xLixO4 in the midinfrared

films to characterize this weakened superconducting state. Our results show the presence of an energy gap with ratio