Enhancement of Superfluid Stiffness, Suppression of Superconducting T_c and Field-induced Magnetism in the Pnictide Superconductor LiFeAs

Autor:	Pratt, F. L., Baker, P. J., Blundell, S. J., Lancaster, T., Lewtas, H. J., Adamson, P., Pitcher, M. J., Parker, D. R., Clarke, S. J.
Rok vydání:	2008
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. B 79, 052508 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.79.052508
Popis:	Transverse-field muon-spin rotation measurements performed on two samples of LiFeAs demonstrate that the superfluid stiffness of the superconducting condensate in relation to its superconducting transition temperature is enhanced compared to other pnictide superconductors. Evidence is seen for a field-induced magnetic state in a sample with a significantly suppressed superconducting transition temperature. The results in this system highlight the role of direct Fe-Fe interactions in frustrating pairing mediated by antiferromagnetic fluctuations and suggest that, in common with other pnictide superconductors, the system is close to a magnetic instability. Comment: 4 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0810.0973 Zobrazit plný text záznamu View this record from Arxiv