Excitation Spectrum and Effects of Normal Impurities on Heavy Electron Superconductors

Masatoshi Imada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Excited states in superconductors formed at normal impurities are investigated in the circumstance that the effective fermi energy is at most an order or magnitude larger than the superconducting gap and consequently the coherence length is roughly an order of magnitude larger than the lattice constant. It is discussed that the substantial spatial variation of the order parameter amplitude around an impurity easily occurs. The excitation energy of the bound state around the impurity extends down to a tenth of the gap in typical examples, which results in a new type of gapless-like behavior except at extremely low temperatures. The specific heat shows qualitatively different behavior from the BCS result and does not follow simple temperature dependence.

Original languageEnglish
Pages (from-to)3539-3544
Number of pages6
Journaljournal of the physical society of japan
Issue number10
Publication statusPublished - 1986 Oct
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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