Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-T-c superconductors - art. no. 054519

We examine the temperature dependence of the electronic states in the strip e phase of high-T-c cuprates by using the t-J model with a potential that s tabilizes vertical charge stripes. Charge and spin-correlation functions an d optical conductivity are calculated by using finite-temperature Lanczos m ethod. At zero temperature, the antiferromagnetic correlation between a spi n in a charge stripe and that in a spin domain adjacent to the stripe is we ak, since the charge stripe and the spin domain are almost separated. With increasing temperature, the correlation increases and then decreases toward high temperature. This is in contrast to other correlations that decrease monotonically. From the examination of the charge dynamics, we find that th is anomalous temperature dependence of the correlation is the consequence o f a crossover from one-dimensional electronic states to two-dimensional one s.