Superconducting energy gap

Superconducting electromagnets, current leads in, 23 855-856 Superconducting energy gap, 23 840 Superconducting fault current limiter (FCL), 23 867-868 Superconducting joints, 23 847 bulk, 23 844... 

Kiefl RF, MacFarlane WA, Chow KH, Dunsiger S, Duty TL, Johnston TMS, Schneider JW, Sonier J, Brard L, Strongin RM, Fischer JE, Smith AB 111 (1993) Coherence peak and superconducting energy gap in Rb3Cgo observed by muon spin relaxation. Phys Rev Lett 70 3987-3990... 

One of the most important features in the IR region of the spectrum should be the appearance of the superconducting energy gap. The higher transition temperature materials should display larger values for the gap if they are BCS superconductors. The gap observed for BaPbj.jjBijPg has been shown to agree with the BCS prediction (57). 

Figure 5. Theoretical temperature dependence of the superconducting energy gap.

Figure 2 (a) Superconducting energy gap distribution for about one hundred different junctions prepared on a MgB2 film [27]. The inset shows the single gap distribution, (b) Theoretical gap distribution after [13]. 

We would like to compare these dependences with the expression for the conductance of the tunnel junction due to the self-energy effect in the superconducting energy gap ... 

The superconducting gaps have been measured by a tunneling spectroscopic method on a Cu(NCS)2 salt IAI2O3 I Au junction. No reliable spectra were obtained at temperatures above 4.2 K. Well below T, a superconducting energy gap, somewhat comparable to the BCS theory, was detected for one sample ... 

Concluding this subsection, we stress that there is no experimental evidence for a clear superconducting energy gap in any of the cuprates. Residual absorption is universally found in high-Tc superconductors. This behavior is different from the response of other... 

STS has also been applied to a study of the unoccupied surface states of graphite [249], hydrogen-like image states on clean and oxygen-covered nickel and on gold epitaxed on silicon (111) [266], [267], the superconducting energy gap in NbsSn [268], the electronic structure of the InP (110) surface [245], and copper phthalocyanine adsorbed on Cu (100) [269]. 

T12201 YBCO, YBCO-123, Y-123 Tl2Ba2Ca ,Cu 02 +4 Tl2Ba2CuOg j YBa2Cu.3 07 A superconducting energy gap... 

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