Solomon Isakovych Pekar (Ukrainian: Соломон Ісакович Пекар; 16 March 1917 – 8 July 1985) was a Soviet theoretical physicist, born in Kyiv, Ukraine.
He was a full Member of the Ukrainian Academy of Sciences and is known for his fundamental contributions to condensed matter physics, especially for introducing and advancing the concept of polaron as a charge carrier in solids.
In the strong coupling limit, polaron binding energy was found by Pekar, and its effective mass is described by the Landau-Pekar formula.
[10] Pekar also proposed a mechanism of coupling between the electron’s orbital and spin degrees of freedom in crystals that originates from the spatial inhomogeneity of the magnetic field rather than from the semirelativistic Thomas term.
After WWII Pekar established a Chair in theoretical physics in the T. G. Shevchenko Kiev University and undergraduate and graduate programs in this field.