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Transient Infrared Photoreflectance Study of Superconducting MgB2: Evidence for Multiple Gaps and Interband Scattering
R. P. S. M. Lobo, J. J. Tu, Eun-Mi Choi +4
We studied the far-infrared reflectance of superconducting MgB2 in and out of equilibrium using pulsed synchrotron radiation. The equilibrium data can be described by a single ener…
Correlation of microwave surface impedance of MgB_2 thin film with material parameters and a temperature niche for microwave applications
B. B. Jin, T. Dahm, C. Iniotakis +11
Two issues related to the microwave surface impedance Z_s of MgB_2 thin film are discussed in this Letter, both being significant for potential microwave applications. At first, a…
Effect of High Energy Heavy Ion Irradiation on c-axis Oriented MgB2 Films
R. J. Olsson, W. K. Kwok, G. Karapetrov +8
We report on the transport, magnetization, and scanning tunneling spectroscopy measurements on c-axis oriented thin films of MgB2 irradiated with high energy heavy ions of uranium…
Superconducting gap and electron-phonon interaction in MgB thin film studied by point contacts
N. L. Bobrov, P. N. Chubov, Yu. G. Naidyuk +6
The superconducting order parameter and electron-phonon interaction (EPI) in a MgB c-axis oriented thin film are investigated by point contacts (PCs). Two superconducting gap…
Optical studies of charge dynamics in c-axis oriented superconducting MgB2 films
J. J. Tu, G. L. Carr, V. Perebeinos +7
Temperature dependent optical conductivities and DC resistivity of c-axis oriented superconducting (Tc = 39.6 K) MgB2 films (~ 450 nm) have been measured. The normal state ab-plane…
Epitaxial MgB2 superconducting thin films with a transition temperature of 39 Kelvin
W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi +2
We report the growth of high-quality epitaxial MgB2 thin films on (1102) Al2O3 and (001) SrTiO3 substrates by using a pulsed laser deposition technique. The thin films grown on Al2…