Possibility of local pair existence in optimally doped SmFeAsO1−xin pseudogap regime

Autor:	V. Yu. Tarenkov, A. L. Solovjov, A. B. Agafonov, V. B. Stepanov, V. N. Svetlov, A. I. D’yachenko, S. L. Sidorov
Rok vydání:	2011
Předmět:	Superconductivity Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Spins Electrical resistivity and conductivity Atomic force microscopy Doping General Physics and Astronomy Antiferromagnetism Structural transition Pseudogap
Zdroj:	Low Temperature Physics. 37:557-560
ISSN:	1090-6517 1063-777X
Popis:	We report the analysis of pseudogap Δ* derived from resistivity experiments in FeAs-based superconductor SmFeAsO0.85, having a critical temperature Tc = 55 K. Rather specific dependence Δ*(T) with two representative temperatures followed by a minimum at about 120 K was observed. Below Ts ≈ 147 K, corresponding to the structural transition in SmFeAsO, Δ*(T) decreases linearly down to the temperature TAFM ≈ 133 K. This last peculiarity can likely be attributed to the antiferromagnetic (AFM) ordering of Fe spins. It is believed that the found behavior can be explained in terms of Machida, Nokura, and Matsubara theory developed for the AFM superconductors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8eada76a9d8e3150b396b4d0ebf4ffc https://doi.org/10.1063/1.3630135 Zobrazit plný text záznamu