Raman Scattering Studies of the Orbital, Magnetic, and Conducting Phases in Double Layer Ruthenates
Karpus, John Francis
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https://hdl.handle.net/2142/80562
Description
Title
Raman Scattering Studies of the Orbital, Magnetic, and Conducting Phases in Double Layer Ruthenates
Author(s)
Karpus, John Francis
Issue Date
2007
Doctoral Committee Chair(s)
Cooper, S. Lance
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
Dilute La doping in Ca3Ru2O7 changes the lattice parameter along the c-axis and also adds an extra electron, providing bandwidth and band filling control, respectively. This addition of La also lowers the orbital ordering temperature to T ∼ 43 K, and provides a greater sensitivity of the orbital phases to applied magnetic fields, as evidenced by changes in the phases occurring at lower fields and over a greater field range than seen in the undoped system.
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