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C axis optical property of a family of a high temperature superconductors LaSrCuO

Yazdani, Maryam, Yazdani
http://rave.ohiolink.edu/etdc/view?acc_num=akron1467917803

Abstract Details

2016, Master of Science, University of Akron, Physics.
In this thesis, I investigated c-axis optical properties of a family of high temperature superconductors La2-xSrxCuO4. Eight samples with different dopings, from x = 0.04 to x = 0.20 were studied at temperatures 32 K, 80 K, and 300 K, all in the normal (non-superconducting) state. I used the Fano model to fit their infrared spectra and from the best fits I extracted the parameters of the phonons: oscillator frequency, plasma frequency, scattering rate and Fano frequency. I then compared these results with the results obtained previously on the same data set using the Drude-Lorentz model. The fits obtained using the Fano fit are better, which indicates that electron-phonon coupling in La2-xSrxCuO4 is strong and must be taken into account during band-structure and phonon calculations. I also found that stripe instability in La2-xSrxCuO4, which is known to be strongest at 1/8 doping, has a significant effect on phonon line-shapes.
Sasa Dordevic (Advisor)
Jutta Luettmer-Strathmann (Committee Member)
Alper Buldum (Committee Member)
51 p.
Physics
Fano mode; Drude Lorentz mode; high temperature superconductors; normal state; stripe phases; doping; phonon; oscillator frequency; plasma frequency, and scattering rate

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Citations

  • Yazdani, Yazdani, M. (2016). C axis optical property of a family of a high temperature superconductors LaSrCuO [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1467917803

    APA Style (7th edition)

  • Yazdani, Yazdani, Maryam. C axis optical property of a family of a high temperature superconductors LaSrCuO . 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1467917803.

    MLA Style (8th edition)

  • Yazdani, Yazdani, Maryam. "C axis optical property of a family of a high temperature superconductors LaSrCuO ." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1467917803

    Chicago Manual of Style (17th edition)

akron1467917803
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© 2016, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.