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The Application of Two Fluid Model to IR Spectra of Heavy Fermions

Hathurusinghe Dewage, Prabuddha Madusanka
http://orcid.org/0000-0003-2657-3416
http://rave.ohiolink.edu/etdc/view?acc_num=akron1541588399996827

Abstract Details

2018, Master of Science, University of Akron, Physics.
This work studies conductivity data experimentally determined using IR spectroscopy for three heavy fermion materials: YbFe4Sb12, CeRu4Sb12 and CeCoIn5. We describe them using the two fluid model of electrons and mathematically analyze the materials using the Drude-Lorentz model. In particular, using the program RefFit, the optical data in the frequency range of 4-25,000 cm-1 for temperatures ranging from 8-300 K was considered. We found the plasma frequency and scattering rate and observed how temperature effected their magnitudes and the distributions of electrons in our system. Through analysis of these Drude-Lorentz model parameters, the characteristic temperature - the point below which large conductivity exists - of all three materials was found to be in the range of 70-80 K. Further, using these characteristic temperatures, we showed that the optical data was described by a modified form of the hybridization order parameter equation. This demonstrates that the IR spectra of these materials can be described using the two fluid model.
Sasa Dordevic, Dr (Advisor)
Yu-Kuang Hu, Dr (Committee Co-Chair)
Sergei Lyuksyutov, Dr (Committee Co-Chair)
80 p.
Physics; Solid State Physics
heavy fermion; two fluid model; IR spectra; drude-lorentz model

Recommended Citations

Citations

  • Hathurusinghe Dewage, P. M. (2018). The Application of Two Fluid Model to IR Spectra of Heavy Fermions [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1541588399996827

    APA Style (7th edition)

  • Hathurusinghe Dewage, Prabuddha Madusanka. The Application of Two Fluid Model to IR Spectra of Heavy Fermions. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1541588399996827.

    MLA Style (8th edition)

  • Hathurusinghe Dewage, Prabuddha Madusanka. "The Application of Two Fluid Model to IR Spectra of Heavy Fermions." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1541588399996827

    Chicago Manual of Style (17th edition)

akron1541588399996827
286
© 2018, some rights reserved.Creative Commons License The Application of Two Fluid Model to IR Spectra of Heavy Fermions by Prabuddha Madusanka Hathurusinghe Dewage is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Akron and OhioLINK.