Tc-dependence of energy gap and asymmetry of coherence peaks in NdBa2Cu3O7-δ superconductors

P. Das, M. R. Koblischka, Th Wolf, P. Adelmann, U. Hartmann

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We report here the results of scanning tunneling spectroscopy experiments performed on hole-doped NdBa2Cu3O7- δ single crystals of Tc values of 76 K, 93.5 K and 95.5 K. The energy gaps are observed to be increasing with decreasing Tc values. The coherence peaks are asymmetric with the peaks at the filled states being larger than those at the empty ones. The asymmetry increases with decreasing T c. The observed asymmetry and its Tc-dependence can be explained by considering the Mott insulating nature of the material at the undoped state.

本文言語English
論文番号47004
ジャーナルEPL
84
4
DOI
出版ステータスPublished - 2008
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「T<sub>c</sub>-dependence of energy gap and asymmetry of coherence peaks in NdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> superconductors」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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