(1) On the magnetic behaviour of electrons in crystals. Offprint. (2) On the specific heat of the superconductive state. Offprint

1944. Klein, Oskar (1894-1977). (1) On the magnetic behaviour of electrons in crystals. Offprint from Arkiv för Matematik, Astronomi och Fysik 31A (1944). 15pp. 219 x 141 mm. Original printed wrappers, a bit sunned. (2) On the specific heat of the superconductive state. Offprint from Arkiv för Matematik, Astronomi och Fysik 33B (1945). 7pp. 217 x 142 mm. Original plain wrappers, a bit sunned. Together 2 items. Very good to fine. First Editions, Offprint Issues. In the 1940s Klein became interested in superconductivity, making important contributions to the (truncated) subject. In the first paper listed above, “in order to obtain a quantum mechanical microscopic model of [superconductivity], he computed the diamagnetic properties of an electron gas” (Dictionary of Scientific Biography). After collaborating with Jens Lindhard on developing a quantum theory of the superconductive state, which the two published in 1945 (not present here), Klein published a paper on the specific heat of the superconductive state (no. [2] above), in which he proposed “a possible explanation of its characteristic features” (p. 1). . (Inventory #: 50992)