Open AccessEnergy gap structure and tunneling characteristics of layered superconductors
Author(s) -
S.H. Liu,
Richard A. Klemm
Publication year - 1993
Language(s) - English
Resource type - Reports
DOI - 10.2172/29426
Subject(s) - superconductivity , condensed matter physics , quantum tunnelling , quasiparticle , scanning tunneling microscope , gravitational singularity , density of states , physics , high temperature superconductivity , logarithm , range (aeronautics) , materials science , quantum mechanics , mathematical analysis , mathematics , composite material
The authors have analyzed the energy gaps and density-of-states (DOS) of layered superconductors with two inequivalent layers in a unit cell along the c-axis. In the physically interesting parameter range where the interlayer hopping strengths of the quasiparticles are comparable to the critical temperature, the peaks in the DOS curve do not correspond to the order parameters (OP`s) of each layer, but depend on the OP`s and the interlayer hopping strengths in a complex manner. In contrast to a BCS superconductor, the DOS of layered systems have logarithmic singularities. The simulated tunneling characteristics bear close resemblance to experimental results