Experimental realizations of Heisenberg Spin Chains

Tags: Experiments, Heisenberg Spin Chain, KPZ

Reference for Experiemental evidence for KPZ fluctuations in a Heisenberg Spin Chain

This reference gives experimental evidence of KPZ dynamics via neutron scattering experiments simulating the dynamics of a one-dimensional Heisenberg spin chain with KCuF3. Inelastic neutron scattering data is directly proportional to the dynamical spin structure factor \(S(Q,\omega)\), which in the small \(Q\) and \(\hbar \omega \to 0\) limit is expected to be of the form \(Q^{-z}\) where \(z\) is the universal dynamical exponent. In the KPZ regime, \(z = 3/2\).