Point Contact Spectroscopy of Nb3Sn Crystals: Evidence of a CDW Gap Related to the Martensitic Transition

Abstract

Two Single crystals of Nb3Sn presenting the martensitic anomaly at different temperature and shape, as observed with specific heat measurements, were used to study structural features in the electronic density of states with point contact spectroscopy. At high temperature below the martensitic anomaly, we observed different spectroscopic characteristics. One sample displaying a well marked specific heat peak, shows a clear defined structure in the differential conductance that evolves with temperature and may be associated with changes on the density of states due to the opening of a charge density wave gap. Those features are very depending on the crystallographics characteristics of the single crystal examined.

13 pages 6 figures. accepted in Solid State Communication

References in corpus (2)

• Nonconstant electronic density of states tunneling inversion for A15 superconductors: Nb3Sn
• Specific heat studies of pure Nb3Sn single crystals at low temperature

Cited by in corpus (5)

• Detection of Orbital Fluctuations Above the Structural Transition Temperature in the Iron-Pnictides and Chalcogenides
• Competing Orders and Ultrafast Energy Transfer at the Quantum Limit in a Nb${}_3$Sn Superconductor Probed by Terahertz Electrodynamics
• Theory of Point Contact Spectroscopy in Correlated Materials
• Electronic topological transitions in Nb${}_3$X (X = Al, Ga, In, Ge and Sn) under compression investigated by first principles calculations
• Point Contact Spectroscopy of Fe Pnictides & Chalcogenides In The Normal State