Theory of superconductivity of systems with pairing of spatially separated electrons and holes

Journal Article · Thu Apr 01 04:00:00 EST 1976 · Sov. J. Low Temp. Phys. (Engl. Transl.); (United States)

OSTI ID:7327716

Shevchenko, S I

The possibility of superconductivity is predicted in systems with pairing of spatially separated electrons and holes. Gor'kov and Ginzburg-Landau equations are obtained for the systems under consideration. It is shown that the gap in the elementary excitation spectrum is ..delta..=v/sub F/p/sub a/e/sup -1///sup zeta/, zeta=4(p/sub a//p/sub 0/)/sup 2/(e/sup 2//a/sub 0/)(p/sup 2//sub 0//2m). Here v/sub F/ is the velocity; p/sub 0/ is the Fermi momentum; p/sub a/=1/2a (2a is the spacing between domains with electron and hole conductivity); a/sub 0/ is the spacing between carriers; m=m/sub 1/m/sub 2//(m/sub 2/+m/sub 2/)(m/sub 1/,m/sub 2/ are the effective masses of the electrons and holes). The system response to a weak magnetic field is calculated; the currents it causes are J/sub 1/=-J/sub 2/ =-)(N (T) e/sup 2/)/(m/sub 1/+m/sub 2/) c/sup 2/) (A/sub 1/-A/sub 2/)(A/sub 1/A/sub 2/ are the values of the vector potential in domains with electron and hole conductivity; J/sub 1/J/sub 2/ are the current densities in the appropriate domains; N (T) is the concentration of superconducting electrons). The presence of a stationary Josephson effect is established, i.e., the possibility of superconductivity in the systems under consideration is proved. (AIP)

• Research Organization: Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
• OSTI ID: 7327716
• Journal Information: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States) Vol. 2:4; ISSN SJLPD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLLECTIVE EXCITATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-ELECTRON COUPLING
ENERGY GAP
GINZBURG-LANDAU THEORY
HOLES
INTERACTIONS
JOSEPHSON EFFECT
MAGNETIC FLUX
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY