Energy gap structure and tunneling characteristics of layered superconductors Page: 4 of 34
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ENERGY GAP STRUCTURE AND TUNNELING CHARACTERISTICS
OF LAYERED SUPERCONDUCTORS
S. H. Liu
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6032
R. A. Klemm
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
We have analyzed the energy gaps and density-of-states (DOS) of layered supercon-
ductors 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. Our simulated tunneling characteristics
bear close resemblance to experimental results.
The submitted manuscript has been authored
by a contractor of the U.S. Government
under contract No. W-31-109-ENG-38.
Accordingly, the U. S. Government retains a
nonexclusive, royalty-free license to publish
or reproduce the published form of this
contribution, or allow others to do so, for
U. S. Government purposes.
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Liu, S.H. & Klemm, R.A. Energy gap structure and tunneling characteristics of layered superconductors, report, June 1, 1993; Illinois. (digital.library.unt.edu/ark:/67531/metadc682733/m1/4/: accessed February 18, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.