2012/09/04 by Marcin Matusiak, E. Pomjakushina, Ekaterina Pomjakushina +2
Chemistry · Materials Science · Physics and Astronomy · #Antiferromagnetism #Chemistry #Condensed matter physics #Crystal Structures and Properties #Crystallography #Doping #Electrical resistivity and conductivity #Fermi surface #Iron-based superconductors research #Materials science #Physics #Rare-earth and actinide compounds #Seebeck coefficient #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2012.08.006
published as Physica C 483 (2012) 21 · 14 pages, 4 figures
arxiv created 2012/09/04 · openalex publication_date 2012/09/11 · arxiv updated 2012/09/28 · openalex created_date 2022/08/13 · openalex updated_date 2026/06/11
We report resistivity as well as the Hall, Seebeck and Nernst coefficients data for Fe1+dTe1-xSex single crystals with x = 0, 0.38, and 0.40. In the parent compound Fe1.04Te we observe at Tn = 61 K a sudden change of all quantities studied, which can be ascribed to the Fermi surface reconstruction due to onset of the antiferromagnetic order. Two very closely doped samples: Fe1.01Te0.62Se0.38 (Se38) and Fe1.01Te0.60Se0.40 (Se40) are superconductors with Tc = 13.4 K and 13.9 K, respectively. There are no evident magnetic transitions in either Se38 or Se40. Properties of these two single crystals are almost identical at high temperatures, but start to diverge below T ~ 80 K. Perhaps we see the onset of scattering that might be a related to changes in short range magnetic correlations caused by selenium doping.