TY - JOUR
T1 - Emergent defect states as a source of resistivity anisotropy in the nematic phase of iron pnictides
AU - Gastiasoro, Maria N.
AU - Paul, I.
AU - Wang, Y.
AU - Hirschfeld, P. J.
AU - Andersen, Brian M.
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/9/15
Y1 - 2014/9/15
N2 - We consider the role of potential scatterers in the nematic phase of Fe-based superconductors above the transition temperature to the (π, 0) magnetic state but below the orthorhombic structural transition. The anisotropic spin fluctuations in this region can be frozen by disorder, to create elongated magnetic droplets whose anisotropy grows as the magnetic transition is approached. Such states act as strong anisotropic defect potentials that scatter with much higher probability perpendicular to their length than parallel, although the actual crystal symmetry breaking is tiny. We calculate the scattering potentials, relaxation rates, and conductivity in this region and show that such emergent defect states are essential for the transport anisotropy observed in experiments.
AB - We consider the role of potential scatterers in the nematic phase of Fe-based superconductors above the transition temperature to the (π, 0) magnetic state but below the orthorhombic structural transition. The anisotropic spin fluctuations in this region can be frozen by disorder, to create elongated magnetic droplets whose anisotropy grows as the magnetic transition is approached. Such states act as strong anisotropic defect potentials that scatter with much higher probability perpendicular to their length than parallel, although the actual crystal symmetry breaking is tiny. We calculate the scattering potentials, relaxation rates, and conductivity in this region and show that such emergent defect states are essential for the transport anisotropy observed in experiments.
UR - http://www.scopus.com/inward/record.url?scp=84907200666&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907200666&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.113.127001
DO - 10.1103/PhysRevLett.113.127001
M3 - Article
AN - SCOPUS:84907200666
SN - 0031-9007
VL - 113
JO - Physical review letters
JF - Physical review letters
IS - 12
M1 - 127001
ER -