Study of Superconductors by Electron Tunneling PDF Download
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Author: Ivar Giaever
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
Author: Ivar Giaever
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
Author: J.T. Chen
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Michael Kent Maul
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Author: Wenqing Dai
Publisher:
ISBN:
Category :
Languages : en
Pages : 155
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Author: Schackert, Michael Peter
Publisher: KIT Scientific Publishing
ISBN: 3731502380
Category : Physics
Languages : en
Pages : 148
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Book Description
This work describes the experimental study of electron-boson interactions in superconductors by means of inelastic electron tunneling spectroscopy performed with a scanning tunneling microscope (STM) at temperatures below 1 K. This new approach allows the direct measurement of the Eliashberg function of conventional superconductors as demonstrated on lead (Pb) and niobium (Nb). Preparative experiments on unconventional iron-pnictides are presented in the end.
Author: William J. Keeler
Publisher:
ISBN:
Category : Superconductors
Languages : en
Pages : 0
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Book Description
Studies of superconductors as a function of pressure have, until now, been concerned mainly with the bulk properties of the metals. A study of the shift of some of the microscopic properties of strong-coupling Pb with pressure has been undertaken and this thesis reports the results of this pressure study. The method of investigation used was the electron tunneling technique, where the pressure production was achieved by suspending the samples in a solid helium bath. The energy gap and phonon spectrum of Pb as reflected in the junction conductance curves were studied as a function of pressure for the first time. The average value of dT /dP from many different junctions is in agreement with published results for bulk Pb. Shifts in the predominant transverse and longitudinal phonon groups were observed. These shifts occur in the dispersive region of the two main phonon branches. Gruneisen q's of 7 ( 0 ) = 2 0 52 and y(co) = 3.32 were obtained for the phonon peak- regions., and these can be favourable compared with results from thermal expansion work. The "recombination effect" was studied and found to be smaller than predicted, and perhaps absent altogether.
Author: T. Wolfram
Publisher: Springer Science & Business Media
ISBN: 3642812287
Category : Technology & Engineering
Languages : en
Pages : 247
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Book Description
Inelastic Electron Tunneling Spectroscop~ or lETS, provides a unique technique for electronically monitoring the vibrational modes of molecul (;5 adsorbed on a metal oxide surface. Since the discovery of the phenomena by JAKLEVIC and LM1BE in 1966, lETS has been developed by a number of scientists as a method for studying the surface chemistry of molecular species adsorbed on aluminum oxide. Recent applications of lETS include investigations of physical and chemical adsorption of hydrocarbons, studies of catalysis by metal particles, detection and identification of trace substances in air and water, and studies of biological molecules and electron damage to such molecules. lETS has been employed to investigate adhesive materials, and studies are currently in prog ress to investigate corrosion species and corrosion inhibitors on aluminum and its alloys. Electronic transitions of molecules have also been studied by lETS. The recent development of the "external doping" technique, whereby molecu lar species can be introduced into fabricated tunnel junctions, opens the door for a vast new array of surface chemical studies by lETS. lETS is rap idly becoming an important tool for the study of surface and interface phe nomena. In addition to its role in surface studies, inelastic tunneling has proved extremely valuable for the study of the electronic properties of thin metallic films, and the recent discovery of light emission from inelastic tunneling promises to be of some importance in the area of device physics.
Author: Mark R. Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Author: Barry N. Taylor
Publisher:
ISBN:
Category : Superconductors
Languages : en
Pages : 249
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Author: Elias Burstein
Publisher: Springer Science & Business Media
ISBN: 1468417525
Category : Science
Languages : en
Pages : 574
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Book Description
The aim of this volume is to provide advanced predoctoral students and young postdoctoral physicists with an opportunity to study the concepts of tunneling phenomena in solids and the theoretical and experimental techniques for their investigation. The contributions are primarily tutorial in nature, covering theoretical and experimental aspects of electron tunnel ing in semiconductors, metals, and superconductors, and atomic tunneling in solids. The work is based upon the lectures delivered at the Advanced Study Institute on "Tunneling Phenomena in Solids," held at the Danish A. E. C. Research Establishment, Riso, Denmark, June 19-30, 1967. Sponsored by the Danish Atomic Energy Commission, the Nordic Institute for Theoretical Physics (NORDITA), and the Science Affairs Division of NATO, with the cooperation of the University of Copenhagen, the Technical University of Denmark, Chalmers Institute of Technology, and the University of Penn sylvania, the lectures were presented by a distinguished panel of scientists who have made major contributions in the field. The relatively large number of lecturers was, in part, made possible by the close coordination of the Advanced Study Institute with the Second International Conference on Electron Tunneling in Solids, which was held at Riso on June 29, 30 and July 1, 1967, under the sponsorship of the U. S. Army Research Office Durham. We are indebted to I. Giaever, E. O. Kane, J. Rowell, and J. R. Schrieffer for advice and assistance in planning the lecture program of the Institute.
