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Letter

Nature Physics 5, 565–569 (1 August 2009) | doi:10.1038/nphys1328

Appearance of a fractional Stokes|[ndash]|Einstein relation in water and a structural interpretation of|[nbsp]|its onset

Limei Xu , Francesco Mallamace , Zhenyu Yan , Francis W. Starr , Sergey V. Buldyrev & H. Eugene Stanley

The Stokes–Einstein relation has long been regarded as one of the hallmarks of transport in liquids. It predicts that the self-diffusion constant D is proportional to (|[tau]|/T)|[minus]|1, where |[tau]| is the structural relaxation time and T is the temperature.