TY - JOUR
T1 - Disorder-Induced Freezing of Dynamical Spin Fluctuations in Underdoped Cuprate Superconductors
AU - Andersen, Brian Møller
AU - Graser, Siegfried
AU - Hirschfeld, Peter J.
PY - 2010/9/28
Y1 - 2010/9/28
N2 - We study the dynamical spin susceptibility of a correlated d-wave superconductor (dSC) in the presence of nonmagnetic disorder, using an unrestricted Hartree-Fock approach. This model provides a concrete realization of the notion that disorder slows down spin fluctuations, which eventually "freeze out." The evolution of disorder-induced spectral weight transfer agrees qualitatively with experimental observations on underdoped cuprate superconductors. For sufficiently large disorder concentrations, static spin density wave (SDW) order is created when droplets of magnetism nucleated by impurities overlap. We also study the disordered stripe state coexisting with a dSC and compare its magnetic fluctuation spectrum to that of the disorder-generated SDW phase.
AB - We study the dynamical spin susceptibility of a correlated d-wave superconductor (dSC) in the presence of nonmagnetic disorder, using an unrestricted Hartree-Fock approach. This model provides a concrete realization of the notion that disorder slows down spin fluctuations, which eventually "freeze out." The evolution of disorder-induced spectral weight transfer agrees qualitatively with experimental observations on underdoped cuprate superconductors. For sufficiently large disorder concentrations, static spin density wave (SDW) order is created when droplets of magnetism nucleated by impurities overlap. We also study the disordered stripe state coexisting with a dSC and compare its magnetic fluctuation spectrum to that of the disorder-generated SDW phase.
U2 - 10.1103/PhysRevLett.105.147002
DO - 10.1103/PhysRevLett.105.147002
M3 - Journal article
C2 - 21230861
SN - 0031-9007
VL - 105
SP - 147002
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
ER -