Showing papers on "Scanning tunneling spectroscopy published in 1978"
73 citations
44 citations
19 citations
16 citations
TL;DR: In this paper, a direct measurement of the tunneling current density, which is found to be in good agreement with free-electron theory for W(110, was reported.
Abstract: The phenomenon of quantum-mechanical tunneling of an electron through a barrier in the potential energy has been well established in a variety of experiments. The quantity which is usually measured in these experiments is the rate of change of tunneling current and not the absolute current density. This paper reports on a direct measurement of the tunneling current density, which is found to be in good agreement with free-electron theory for W(110).
14 citations
TL;DR: In this paper, a tunneling contact between indium and bulk indium was constructed and the differential tunneling resistance was measured for temperatures down to 50mK and information on the energy gap of (SN)x has been derived.
Abstract: Tunneling contacts have been prepared (i) between (SN)x and bulk indium and (ii) between different (SN)x crystals. The differential tunneling resistance was measured for temperatures down to 50mK and information on the energy gap of (SN)x has been derived. The measured gap turns out to depend critically on the way the tunneling contact is prepared.
8 citations
TL;DR: In this article, strong temperature dependent peaks in the tunnel conductance of Al-Al oxide-Pd diodes appearing at low temperatures are interpreted in terms of resonant tunneling via impurity states.
4 citations
01 Jan 1978
TL;DR: In this paper, it was shown that A1 is the most convenient material in which to observe this Zeeman splitting because its low atomic number leads to little spin orbit scattering and thereby little mixing of the spin states.
Abstract: When a superconductor of low atomic number is placed in a magnetic field H the peaks in the quasiparticle states on each side of the energy gap are Zeeman split by an amount 2μH where μ is the magnetic moment of the electron. In order to see this effect the film must be thinner than about 100 A and oriented with its plane in the field direction. Under these conditions the effect of orbital depairing is small and the effect of spin splitting can be observed in the tunneling conductance. A1 is the most convenient substance in which to observe this Zeeman splitting because its low atomic number leads to little spin orbit scattering and thereby little mixing of the spin states. In addition, A1 films are easily made as thin as 40 A and Al2O3 forms a good tunnel barrier. The Zeeman splitting of the quasiparticle peaks allows one to study the properties of the counter-electrode by means of an electron-spin polarized tunnel current whose polarization is a known function of the voltage applied to the junction.