Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in La 1-x Sr x MnO 3
TLDR
A model which incorporates the physics of dynamic Jahn-Teller and double-exchange effects is presented and solved via a dynamical mean field approximation to reproduce the behavior of the resistivity and magnetic transition temperature observed in Sr_x MnO_3.Abstract:
A model for the doped rare-earth manganites such as ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ incorporating the physics of dynamic Jahn-Teller and double-exchange effects is presented and solved via a dynamical mean field approximation. The interplay of these two effects as the electron phonon coupling is varied reproduces the observed behavior of the resistivity and magnetic transition temperature.read more
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Simulation of Anisotropic Resistivity for Mixed-Phase Manganite La 2/3 Ca 1/3 MnO 3 Thin Films
Zhou Qing-Li,Guan Dong-Yi,Jin Kui-Juan,Zhao Kun,Chen Zheng-Hao,LU Hui-Bin,Zhou Yue-Liang,Han Peng,Yang Guo-Zhen +8 more
TL;DR: In this article, the authors utilized the random network model based on phase separation scenario to simulate the conductive behavior and anisotropic characteristics of resistivity for La2/3Ca1/3MnO3 (LCMO) thin films.
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Evidence of relaxation of Jahn-Teller polarons above TC in La1-xSrxMnO3 (0.1<xleq0.5)
TL;DR: In this paper, the polaron formation energy EJT has been calculated from fitting a simple two-channel conduction model with the resistivity data for the La1-xSrxMnO3 (0.1
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Band filling effect on polaron localization in La1-x(Ca(y)Sr1-y)xMnO3 manganites.
Giuseppe Allodi,R. De Renzi,K. Zheng,Samuele Sanna,Andrey Sidorenko,C. Baumann,Lara Righi,Fabio Orlandi,Gianluca Calestani +8 more
TL;DR: The results suggest that the effective exchange interaction between Mn ions is essentially governed by local distortions, in agreement with the original double-exchange model, while truncation is primarily, if not entirely, an effect of under- or over-doping.
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Transport, magnetic, internal friction, and Young's modulus in the Y-doped manganites La0.9−xYxTe0.1MnO3
TL;DR: In this article, the local Jahn-Teller (JT) distortion by substitution of smaller Y 3+ ions for larger La 3 + ions and the increased bending of the Mn-O-Mn bond with decreasing the average ionic radius of the A -site element 〈 r A 〉 and the tolerance factor t, resulting in the narrowing of the bandwidth, the decrease of the mobility of e g electrons and the weakening of double-exchange (DE) interaction.
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Growth, microstructure and transport properties of ultrathin epitaxial La 0.5 Ca 0.5 MnO 3 films prepared by laser molecular beam epitaxy
TL;DR: In this article, a structure, surface morphology and electrical study of ultrathin epitaxial La 0.5Ca0.5MnO3 (LCMO) films grown by laser molecular beam epitaxy is presented.