The authors synthesized superconducting Mg1-xScxB2 ternary system to explore the influence of electron doping on the electronic properties. An accurate characterization of several samples by x-ray diffraction and conductance measurements was performed. The Tc vanishes at the crit. concn. x at which the Fermi level is tuned to the top of the σ band. Sc doping in Mg1-xScxB2 allows one to tune the Fermi level to the shape resonance of the σ B superlattice with negligible changes of the lattice and the authors found a large Tc amplification by approaching the shape resonance as predicted by the authors' previous works.
Advances in doping MgB2: tuning the Fermi level to the "shape resonance" by Sc substitution / S., Agrestini; C., Metallo; Filippi, Matteo; Campi, Gaetano; Sanipoli, Carlo; A., Saccone; S., De Negri; M., Giovannini; Latini, Alessandro; Bianconi, Antonio. - In: PHYSICA STATUS SOLIDI C. - ISSN 1610-1634. - 1:(2004), pp. 1832-1835. (Intervento presentato al convegno 3rd International Conference on Magnetic and Superconducting Materials tenutosi a Monastir, TUNISIA nel SEP 01-04, 2003) [10.1002/pssc.200304494].
Advances in doping MgB2: tuning the Fermi level to the "shape resonance" by Sc substitution
FILIPPI, Matteo;CAMPI, GAETANO;SANIPOLI, Carlo;LATINI, ALESSANDRO;BIANCONI, Antonio
2004
Abstract
The authors synthesized superconducting Mg1-xScxB2 ternary system to explore the influence of electron doping on the electronic properties. An accurate characterization of several samples by x-ray diffraction and conductance measurements was performed. The Tc vanishes at the crit. concn. x at which the Fermi level is tuned to the top of the σ band. Sc doping in Mg1-xScxB2 allows one to tune the Fermi level to the shape resonance of the σ B superlattice with negligible changes of the lattice and the authors found a large Tc amplification by approaching the shape resonance as predicted by the authors' previous works.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
