Polaronic behaviour at manganite interfaces studied by advanced Raman scattering techniques

by Sebastian Merten
Cumulative thesis
Date of Examination:2019-10-29
Date of issue:2020-03-20
Advisor:Prof. Dr. Vasily Moshnyaga
Referee:Prof. Dr. Vasily Moshnyaga
Referee:Prof. Dr. Claus Ropers
Referee:Prof. Dr. Kathrin Dörr
Persistent Address: http://dx.doi.org/10.53846/goediss-7896

 

 

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Abstract

English

This work focusses on the polaronic behaviour at manganite interfaces studied by various Raman spectroscopy techniques. Temperature- and magnetic-field-dependent studies probe the polaronic behaviour at the internal interfaces within the phase-separated material showing a strong correlation to the metal-insulator transition and colossal magnetoresistance. Surface-Enhanced Raman studies analyze the manganite's surface and show a strongly Jahn-Teller distorted surface layer of several nanometers thickness.
Keywords: Thin Films; Raman spectroscopy; Surface-Enhanced Raman spectroscopy; Oxide Surfaces; Manganites; Jahn-Teller polarons
 
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