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Scanning tunneling spectroscopy of lead-substituted bismuth strontium copper oxide

Author(s)
Zimmermann, Michelle (Michelle Anne)
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Massachusetts Institute of Technology. Dept. of Physics.
Advisor
Eric W. Hudson.
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M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
The hole-doped cuprate Bi ... is doped with lead to the solubility limit of x = 0.38 and studied using STM/STS in the overdoped regime where Tc < 2K. Despite the high lead content, residual supermodulations are observed in the BiO plane. In agreement with previous studies on (Pb,Bi)-2201, there is no separation of the sample into Pb-rich and Pb-poor domains, nor is there a spectral correlation with Pb location. Differential tunneling conductance is modeled using the van Hove scenario, wherein modulated regions are shown to have higher values of EVHS than flat regions. The consistency of parameters matching theoretical predictions to tunneling spectra suggest that EVHS describes a significant part of the density of states.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.
 
Includes bibliographical references (leaves 39-43).
 
Date issued
2007
URI
http://hdl.handle.net/1721.1/40919
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Massachusetts Institute of Technology
Keywords
Physics.

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