Metallic and semiconducting resistivity behavior of La{sub 1−x}K{sub x}MnO{sub 3} manganites
- School of Physics, Vigyan Bhawan, Devi Ahilya University, Khandwa Road Campus, Indore-452001 (India)
The electrical conduction in both metallic and semiconducting phase of La{sub 1−x}K{sub x}MnO{sub 3} (x = 0.05, 0.1, 0.15) is investigated. The phonon frequencies are estimated from the ab initio theory with calibrated Hamiltonian for the atomic interaction between a pair such as Mn–O and La/K–O including van der Walls interaction. The classical electron–phonon model of resistivity, i.e., the Bloch–Gruneisen (BG) model consistently retraces the reported metallic resistivity behavior. The paramagnetic semiconducting nature is discussed with thermal activation, small polaron conduction and Mott’s variable range hopping model. The comparison of experimental data appears favorable with the present analysis.
- OSTI ID:
- 22269293
- Journal Information:
- AIP Conference Proceedings, Vol. 1591, Issue 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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