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C-axis optical phonons in high temperature superconductor La2-x SrxCuO4

Alziyadi, Mohammed Obaid
http://rave.ohiolink.edu/etdc/view?acc_num=akron1461797112

Abstract Details

2016, Master of Science, University of Akron, Physics.
Infrared and optical spectroscopy have been applied to study the normal state prop- erties of the La2-xSrxCuO4 cuprate superconductor. The c-plane optical response of single crystals of La2-xSrxCuO4 was studied from underdoped to overdoped regions at 32, 80, and 300 K. The doping dependent reflectance spectra were measured from far infrared (10 cm-1) to ultraviolet (50,000 cm-1). The spectra were modeled us- ing the Drude-Lorentz model, which replicates the experimental data of the samples and provides an understanding of the physical phenomena happening in the infrared, visible and ultraviolet regions of radiation. The doping dependence of phonon pa- rameters, i.e., transverse frequency ¿0, plasma frequency ¿p, and scattering rate ¿ are discussed for all observed modes in the La2-xSrxCuO4 reflectance curves. Our results indicate that the temperature and doping level have strong and important effects on the lattice vibrations, especially at room temperature. Another interesting result is a signal of the conducting state observed at a higher doping level, indicating an induction of metallic behavior.
V. Dordevic Sasa , Dr. (Advisor)
Buldum Alper, Dr. (Committee Member)
R. Mallik Robert , Dr. (Committee Member)
70 p.
Physics
Optical phonons in high temperature superconductor

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Citations

  • Alziyadi, M. O. (2016). C-axis optical phonons in high temperature superconductor La2-x SrxCuO4 [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1461797112

    APA Style (7th edition)

  • Alziyadi, Mohammed. C-axis optical phonons in high temperature superconductor La2-x SrxCuO4. 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1461797112.

    MLA Style (8th edition)

  • Alziyadi, Mohammed. "C-axis optical phonons in high temperature superconductor La2-x SrxCuO4." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1461797112

    Chicago Manual of Style (17th edition)

akron1461797112
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© 2016, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.