3 papers
cond-mat.supr-con2001
Effect of Al doping on the optical phonon spectrum in Mg(1-x)Al(x)B(2)
P. Postorino, A. Congeduti, P. Dore +5
Raman and infrared absorption spectra of Mg(1-x)Al(x)B(2) have been collected for 0<x<0.5 in the spectral range of optical phonons. The x-dependence of the peak frequency, the widt…
cond-mat.supr-con2001
A Superconductor Made by a Metal Heterostructure at the Atomic Limit Tuned at the "Shape Resonance": MgB2
A. Bianconi, D. Di Castro, S. Agrestini +5
We have studied the variation of Tc with charge density and lattice parameters in Mg1-xAlxB2 superconducting samples at low Al doping x<8%. We show that high Tc occurs where the ch…
cond-mat.supr-con2001
High Tc superconductivity at a critical strain and charge density in diborides
A. Bianconi, N. L. Saini, D. Di Castro +5
We report variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K…