TY - JOUR
T1 - Competing magnetic double-Q phases and superconductivity-induced re-entrance of C2 magnetic stripe order in iron pnictides
AU - Navarro Gastiasoro, Maria
AU - Andersen, Brian Møller
PY - 2015/10/27
Y1 - 2015/10/27
N2 - We perform a microscopic theoretical study of the generic properties of competing magnetic phases in iron pnictides. As a function of electron filling and temperature, the magnetic stripe (single-Q) order forms a dome, but competing noncollinear and nonuniform double-Q phases exist at the foot of the dome, in agreement with recent experiments. We compute and compare the electronic properties of the different magnetic phases, investigate the role of competing superconductivity, and show how disorder may stabilize double-Q order. Superconductivity is shown to compete more strongly with double-Q magnetic phases, which can lead to reentrance of the C2 (single-Q) order, in agreement with recent thermal expansion measurements on K-doped Ba-122 crystals.
AB - We perform a microscopic theoretical study of the generic properties of competing magnetic phases in iron pnictides. As a function of electron filling and temperature, the magnetic stripe (single-Q) order forms a dome, but competing noncollinear and nonuniform double-Q phases exist at the foot of the dome, in agreement with recent experiments. We compute and compare the electronic properties of the different magnetic phases, investigate the role of competing superconductivity, and show how disorder may stabilize double-Q order. Superconductivity is shown to compete more strongly with double-Q magnetic phases, which can lead to reentrance of the C2 (single-Q) order, in agreement with recent thermal expansion measurements on K-doped Ba-122 crystals.
U2 - 10.1103/PhysRevB.92.140506
DO - 10.1103/PhysRevB.92.140506
M3 - Journal article
SN - 2469-9950
VL - 92
JO - Physical Review B
JF - Physical Review B
M1 - 140506(R)
ER -