@article{
author = "Liu, Yu and Wang, Aifeng and Ivanovski, Valentin N. and Du, Qianheng and Koteski, Vasil J. and Petrović, Čedomir",
year = "2022",
abstract = "We report thermoelectric studies of FeS1-xSex (x=0,0.06) superconducting single crystals that feature high irreversibility fields and critical current density Jc comparable to materials with much higher superconducting critical temperatures (Tc's). The ratio of Tc to the Fermi temperature TF is very small, indicating weak electronic correlations. With a slight selenium substitution on sulfur site in FeS both Tc/TF and the effective mass m∗ rise considerably, implying increase in electronic correlation of the bulk conducting states. The first-principle calculations show rise of the density of states at the Fermi level in FeS0.94Se0.06 when compared to FeS, which is related not only to Fe but also to chalcogen-derived electronic states.",
journal = "Physical Review B",
title = "Thermoelectricity and electronic correlation enhancement in FeS by light Se doping",
volume = "105",
number = "4",
pages = "045133",
doi = "10.1103/PhysRevB.105.045133"
}