Anomalous density of states in multiband superconductors near the Lifshitz transition

2014/09/30 by A. E. Koshelev, K. A. Matveev, К. А. Матвеев · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.90.140505

4 pages, 2 figures

arxiv created 2014/10/08 · openalex publication_date 2014/10/24 · arxiv updated 2015/06/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The authors describe anomalous superconducting properties in a shallow band in which Cooper pairing is induced by deep bands. They demonstrate that the thermodynamic topological phase transition is eliminated by superconductivity, but nevertheless the density of states shows likely detectable qualitative changes with variation of the chemical potential. The authors argue that the proposed physical scenario provides the most natural interpretation for the gap structure recently observed in some iron pnictides and chalcogenides with shallow bands.

Citations

• The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
• Bardeen-Cooper-Schrieffer Theory of Superconductivity in the Case of Overlapping Bands

Cited by

• Strong Landau-quantization effects in high-magnetic-field superconductivity of a two-dimensional multiple-band metal near the Lifshitz transition