TY - JOUR
T1 - Paramagnons in FeSe close to a magnetic quantum phase transition
T2 - Ab initio study
AU - Essenberger, F.
AU - Buczek, P.
AU - Ernst, A.
AU - Sandratskii, L.
AU - Gross, E. K.U.
PY - 2012/8/28
Y1 - 2012/8/28
N2 - The magnetic excitations in FeSe are studied from first principles applying linear response density functional theory. The position of the selenide layer is varied to model the transition between paramagnetic and antiferromagnetic phases. In the paramagnetic phase, close to the magnetic instability, we find a branch of long-lived collective spin excitations (paramagnons). An estimation of the paramagnon-mediated effective electron-electron interaction supports the scenario of Cooper pairing in FeSe induced by spin fluctuations.
AB - The magnetic excitations in FeSe are studied from first principles applying linear response density functional theory. The position of the selenide layer is varied to model the transition between paramagnetic and antiferromagnetic phases. In the paramagnetic phase, close to the magnetic instability, we find a branch of long-lived collective spin excitations (paramagnons). An estimation of the paramagnon-mediated effective electron-electron interaction supports the scenario of Cooper pairing in FeSe induced by spin fluctuations.
UR - http://www.scopus.com/inward/record.url?scp=84865653667&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.060412
DO - 10.1103/PhysRevB.86.060412
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AN - SCOPUS:84865653667
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 060412
ER -