Investigation of LiFeAs by means of "Break-junction" Technique
arXiv:1205.3896 · doi:10.1134/S0021364012100086
Abstract
In our tunneling investigation using Andreev superconductor - normal metal - superconductor contacts on LiFeAs single crystals we observed two reproducible independent subharmonic gap structures at dynamic conductance characteristics. From these results, we can derive the energy of the large superconducting gap meV and the small gap meV at K for the K (the contact area critical temperature which deviation causes the variation of ). The BCS-ratio is found to be , whereas results from induced superconductivity in the bands with the small gap.
7 pages, 5 figures. Published in Pis'ma v ZhETF 95, 604-610 (2012)
References in corpus (14)
- LaFeAsOF: A low carrier density superconductor near itinerant magnetism
- The superconductivity at 18 K in LiFeAs system
- A minimal two-band model for the superconducting Fe-pnictides
- Fermi surface of superconducting LaFePO determined by quantum oscillations
- Electronic Structure of Prototype AFe_2As_2 and ReOFeAs High-Temperature Superconductors: a Comparison
- Weak superconducting pairing and a single isotropic energy gap in stoichiometric LiFeAs
- Electronic Structure of New LiFeAs High-Tc Superconductor
- Time of life as it is in LiFeAs
- Existence, character and origin of surface-related bands in the high temperature iron pnictide superconductor BaFe_{2-x}Co_{x}As_{2}
- Evidence for multiple gaps in specific heat of LiFeAs crystals
- Anion height dependence of Tc and density of states in iron based superconductors
- Microwave Surface Impedance Measurements of LiFeAs Single Crystals
- Small anisotropy of the lower critical field and -wave two-gap feature in single crystal LiFeAs
- Lower Critical Field, Anisotropy, and Two-Gap Features of LiFeAs