Universal high-temperature regime of pinned elastic objects

BUSTINGORRY SEBASTIAN; LE DOUSSAL PIERRE; ROSSO ALBERTO

PHYSICAL REVIEW B

AMER PHYSICAL SOC

Año: 2010 vol. 82 p. 140201 - 140205

1098-0121

We study the high-temperature regime within the glass phase of an elastic object with short-ranged disorder. In that regime we argue that the scaling functions of any observable are described by a continuum model with a d-correlated disorder and that they are universal up to only two parameters that can be explicitly computed. This is shown numerically on the roughness of directed polymer models and by dimensional and functional renormalization-group arguments. We discuss experimental consequences such as nonmonotonous behavior with temperature.