FEEDBACK EFFECTS IN SUPERCONDUCTORS

Note

关键词: CHARGE-DENSITY WAVES;    RAMAN-SCATTERING;   

DOI  :  10.1103/PhysRevB.49.740

来源: SCIE

【 摘 要 】

We calculate corrections to the BCS gap equation caused by the interaction of electrons with the collective phase and amplitude modes in the superconducting state. This feedback reduces the BCS pp parameter DELTA and leaves the critical temperature T(c) unchanged. The feedback effect is proportional to (DELTA/epsilon(F))2, where epsilon(F) is the Fermi energy. This is a negligible correction for type-I superconductors. However, in type-II superconductors the feedback effect is greatly enhanced due to smaller Fermi velocities upsilon(F), and may be responsible for effects seen in recent experimental data on organic superconductors.

【 授权许可】

Free