Scanning tunneling spectroscopy on neutron irradiated MgB₂ thin films

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• 作者：Roberto Di Capua ; Marco Salluzzo ; Ruggero Vaglio ; Carlo Ferdeghini ; Valeria Ferr ; o ; Marina Putti ; Xiaoxing Xi ; Hans U. Aebersold
• 关键词：MgB₂ ; Effect of disorder ; STM ; Tunneling measurements
• 刊名：Physica C
• 出版年：2007
• 出版时间：1 September 2007
• 年：2007
• 卷：460-462
• 期：Part 1
• 页码：574-575
• 全文大小：181 K

文摘

Neutron irradiation was performed on MgB₂ thin films grown by hybrid physical chemical vapor deposition. Samples irradiated with different neutron fluences, having different critical temperatures, were studied by scanning tunneling spectroscopy in order to investigate the effect of the introduced disorder on the superconducting and spectroscopic properties. A monotonic increase of the π gap with increasing disorder was found.