Aspect-Ratio Scaling and the Stiffness Exponentθfor Ising Spin Glasses

We introduce the technique of aspect-ratio scaling to study the scale dependence of interfacial energies in Ising spin glasses, and we show how one can use it to determine the stiffness exponent θ in a clean way, with results that are independent of the domain-wall-forcing boundary conditions imposed on the system. In space dimension d0ex0ex=0ex0ex2 we obtain θ0ex0ex=0ex0ex-0.282(3) for a Gaussian distribution of exchange interactions.