@article {Jena:2016:1936-6612:327,
title = "Low Energy Spin Excitations in Iron-Based Superconductors in a Minimum Single Band Model",
journal = "Advanced Science Letters",
parent_itemid = "infobike://asp/asl",
publishercode ="asp",
year = "2016",
volume = "22",
number = "2",
publication date ="2016-02-01T00:00:00",
pages = "327-330",
itemtype = "ARTICLE",
issn = "1936-6612",
url = "https://www.ingentaconnect.com/content/asp/asl/2016/00000022/00000002/art00011",
doi = "doi:10.1166/asl.2016.6891",
keyword = "OXYPNICTIDE SUPERCONDUCTORS, SPIN DENSITY WAVE",
author = "Jena, Sushree Sangita and Rout, G. C.",
abstract = "We propose a tight-binding single band model for the newly discovered iron-selenide superconductors M
x
Fe2xSe2 (M = Tl, K, Rb, Cs). The dispersion of the single band model consists of nearest-neighbor and next nearest-neighbor hoping integrals
t1, t2. Similarly we consider the spinspin interactions among the spins of the electrons of the nearest-neighbor and next nearest-neighbor interactions with coupling J1 and J2. The spin interactions are considered within a mean-field approximation leading
to spin density wave (SDW) antiferromagnetic order with a spin ordering wave vector, Q (, /2). The electron Green's functions are calculated from the Hamiltonian by using Zubarev's Green's function technique. Finally the spin density wave gap is calculated and
solved self-consistently taking into account a magnetic phase-transition temperatures and their coupling constants.",
}