Multiband effect in elastoresistance of Fe(Se,Te)

Abstract

We have investigated the elastoresistance of two FeSe${}_{1-x}$Te${}_x$ (x about 0.4 - 0.5) compounds that have a close chemical composition but differ significantly in electronic properties. The first compound has a negative temperature coefficient of resistance and does not show any phase transitions other than superconducting. The elastoresistance of this compound approximately follows $1/T$ low as it usually occurs in Fe(Se,S) with metallic conductivity. The second compound has a metallic type of conductivity and in addition to the superconducting transition, there is also a phase transition at a temperature of about 30 K. The elastoresistance of the second compound is sign-reversing and can be approximated with the sum of two Curie-Weiss type terms with opposite signs and different critical temperatures which suggest a competition of contributions to the elastoresistance from different band valleys.

References in corpus (15)

• Nematic order in iron superconductors - who is in the driver's seat?
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Observation of topological superconductivity on the surface of an iron-based superconductor
• Divergent nematic susceptibility in an iron arsenide superconductor
• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• The key ingredients of the electronic structure of FeSe
• Electronic nematic susceptibility of iron-based superconductors
• Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe
• Sign-reversal of the in-plane resistivity anisotropy in iron pnictides
• Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides
• Evolution of the Fermi surface of the nematic superconductors FeSe1-xSx
• Effects of strain on the electronic structure, superconductivity, and nematicity in FeSe studied by angle-resolved photoemission spectroscopy
• Phenomenal magneto-elastoresistance of WTe${}_2$: strain engineering of electronic and quantum transport properties
• Acoustic characteristics of FeSe single crystals Acoustic characteristics of FeSe single crystals
• Majority carrier type inversion in FeSe family and "doped semimetal" scheme in iron-based superconductors

Cited by in corpus (1)

• Two-step phase transitions in Fe(Se,Te)