Superconductivity and ferromagnetism in narrow-band semiconductors with inverse population of the bands

Journal Article · Mon Dec 01 04:00:00 EST 1975 · Sov. Phys. - Solid State (Engl. Transl.); (United States)

OSTI ID:7220647

Kuz'min, Yu M

The occurrence of nonequilibrium superconductivity in narrow-band semiconductors with an inverse population of the energy bands is studied in the case of paramagnetic and ferromagnetic states of the electron system. Using the Wannier representation in the tight-binding approximation it is shown that when the screened Coulomb interaction is strong, a Bose condensate of bound electron pairs forms at a level in the middle of the forbidden band for the case of equal widths for conduction and valence bands. For a ferromagnetic system instability can occur with formation of a superconducting condensate of singlet and triplet pairs (12 references).

• Research Organization: Inst. of Steel and Alloys, Moscow
• OSTI ID: 7220647
• Journal Information: Sov. Phys. - Solid State (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Solid State (Engl. Transl.); (United States) Vol. 17:12; ISSN SPSSA
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FERROMAGNETISM
INSTABILITY
INTERACTIONS
MAGNETISM
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
SEMICONDUCTOR MATERIALS
SUPERCONDUCTIVITY