Thermodynamic measurement on the melting of a two-dimensional electron solid

D. C. Glattli, E. Y. Andrei, and F. I. B. Williams

Service de Physique du Solide et de Résonance Magnétique, Center d'Etudes Nucléaires de Saclay, 91191 Guf-sur-Yvette Cedex, France

Absoulute specific-heat measurements are presented for the solid phase and upper limit of 0.2k_B per particle is established for the change in entropy on melting. The results support the dislocation-pair—unbinding model of Kosterlitz and Thouless.