A series of MgB2 thin films systematically disordered by neutron irradiation have been studied by scanning tunneling spectroscopy. The c-axis orientation of the films allowed a reliable determination of the local density of states of the band. With increasing disorder, the conductance peak moves towards higher voltages and becomes lower and broader, indicating a monotonic increase of the gap and of the broadening parameter. These results are discussed in the framework of two-band superconductivity.
Role of interband scattering in neutron irradiated MgB2 thin films by scanning tunnelling spectroscopy measurements / P., Orgiani; M., Salluzzo; Vaglio, Ruggero. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 75:(2007), pp. 14515-1-14515-5. [10.1103/PhysRevB.75.014515]
Role of interband scattering in neutron irradiated MgB2 thin films by scanning tunnelling spectroscopy measurements
VAGLIO, RUGGERO
2007
Abstract
A series of MgB2 thin films systematically disordered by neutron irradiation have been studied by scanning tunneling spectroscopy. The c-axis orientation of the films allowed a reliable determination of the local density of states of the band. With increasing disorder, the conductance peak moves towards higher voltages and becomes lower and broader, indicating a monotonic increase of the gap and of the broadening parameter. These results are discussed in the framework of two-band superconductivity.| File | Dimensione | Formato | |
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