Shubin Semyon Petrovich (18(31).07.1908, Liepāja ― 28.11.1938, Kolyma) ― Soviet theoretical physicist.
In 1927 he graduated from Moscow State University. In 1932―37 he worked at the Urals Physico-Technical Institute.
From 1935 ― Doctor of Physical and Mathematical Sciences, professor at the Urals Physico-Mechanical Institute. His principal works are devoted to the classical theory of oscillations, the quantum theory of solids, and quantum theory. Together with I.E. Tamm, in 1931 he constructed the quantum theory of the photoelectric effect in metals. In 1933 he proposed a band theory of liquid metals. He is the author of the polar and s-d exchange models of crystals (1934―36, together with S.V. Vonsovsky).
He was repressed in April 1938, and was sentenced by a Special Council under the USSR NKVD for “counterrevolutionary Trotskyist activity” to 8 years' imprisonment.
He died at a logging site. He was rehabilitated posthumously in 1956.

Lit.: Vonsovsky S., Leontovich M., Tamm I. Semyon Petrovich Shubin. On the 50th Anniversary of His Birth and the 20th Anniversary of His Death. Advances in Physical Sciences (Uspekhi Fizicheskikh Nauk). 1958. Vol. 65. Issue 4.