Optical conductivity and penetration depth in MgB(2).
The complex conductivity of a MgB(2) film has been investigated in the frequency range 4<nu<30 cm(-1) and for temperatures 2.7<T<300 K. The overall temperature dependence of both components of the complex conductivity is reminiscent of BCS-type behavior, although a detailed analysis reveals a number of discrepancies. A peak in the temperature dependence of the real part of the conductivity is detected for frequencies below 9 cm(-1). The superconducting penetration depth follows a T(2) behavior at low temperatures.
Pronin
A V
AV
Experimentalphysik V, EKM, Universität Augsburg, 86135 Augsburg, Germany.
Pimenov
A
A
Loidl
A
A
Krasnosvobodtsev
S I
SI