Impurity bound states and disorder-induced orbital and magnetic order in the s+- state of Fe-based superconductors

TY - JOUR

T1 - Impurity bound states and disorder-induced orbital and magnetic order in the s+- state of Fe-based superconductors

AU - Navarro Gastiasoro, Maria

AU - Andersen, Brian Møller

PY - 2013/8

Y1 - 2013/8

N2 - We study the presence of impurity bound states within a five-band Hubbard model relevant to iron-based superconductors. In agreement with earlier studies, we find that in the absence of Coulomb correlations there exists a range of repulsive impurity potentials where in-gap states are generated. In the presence of weak correlations, these states are generally pushed to the edges of the gap, whereas for larger correlations the on-site impurity potential induces a local magnetic region, which reintroduces the low-energy bound states into the gap.

AB - We study the presence of impurity bound states within a five-band Hubbard model relevant to iron-based superconductors. In agreement with earlier studies, we find that in the absence of Coulomb correlations there exists a range of repulsive impurity potentials where in-gap states are generated. In the presence of weak correlations, these states are generally pushed to the edges of the gap, whereas for larger correlations the on-site impurity potential induces a local magnetic region, which reintroduces the low-energy bound states into the gap.

U2 - 10.1007/s10948-013-2153-0

DO - 10.1007/s10948-013-2153-0

M3 - Journal article

SN - 1557-1939

VL - 26

SP - 2651

EP - 2655

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 8

ER -