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The multifractal properties of electronic eigenstates at the metal-insulatortransition of a two-dimensional disordered tight-binding model with spin-orbitinteraction are investigated numerically. The correlation dimensions of thespectral measure $\widetilde{D}_{2}$ and of the fractal eigenstate $D_{2}$ arecalculated and shown to be related by $D_{2}=2\widetilde{D}_{2}$. The exponent$\eta=0.35\pm 0.05$ describing the energy correlations of the criticaleigenstates is found to satisfy the relation $\eta=2-D_{2}$.Comment: 6 pages RevTeX; 3 uuencoded, gzipped ps-figures to appear in J. Phys.  Condensed Matte

Multifractal properties of critical eigenstates in two-dimensional systems with symplectic symmetry