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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14231
Title: Phonon dispersion, Raman spectra, and evidence for spin-phonon coupling in MnV2 O4 from first principles
Authors: Dey D.
Maitra, Tulika
Waghmare U.V.
Taraphder A.
Published in: Physical Review B
Abstract: MnV2O4 in the spinel structure is known to exhibit coupled orbital and spin ordering and its Raman spectra show interesting anomalies in its lowerature phase. With a goal to explain this behavior involving coupled spins and phonons, we determine here the spin-phonon couplings in MnV2O4 from a theoretical analysis of its phonon spectra and their dependence on spin ordering and electron correlations, obtained from first-principles density functional theoretical calculations. Using these in an analysis based on a Landau-like theory, we uncover the mechanism governing the Raman anomalies observed in its lowerature phase. © 2020 American Physical Society.
Citation: Physical Review B (2020), 101(20): -
URI: https://doi.org/10.1103/PhysRevB.101.205132
http://repository.iitr.ac.in/handle/123456789/14231
Issue Date: 2020
Publisher: American Physical Society
ISSN: 24699950
Author Scopus IDs: 57189329600
7004183343
6603903754
6602698909
Author Affiliations: Dey, D., Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India, Department of Physics, Arizona State University, Tempe, AZ 85287, United States
Maitra, T., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Waghmare, U.V., Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, P.O. Jakkur, Bangalore, 560064, India
Taraphder, A., Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India, Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India, School of Basic Sciences, Indian Institute of Technology Mandi, Himachal Pradesh, 175001, India
Funding Details: D.D. acknowledges the Department of Science and Technology (DST), India, for support from an INSPIRE research fellowship. U.V.W. acknowledges support from a J. C. Bose National Fellowship and a Sheikh Saqr Fellowship. A.T. acknowledges research funding from CSIR (India) through Grant No. 03(1373)/16/EMR-II.
Corresponding Author: Dey, D.; Department of Physics, Indian Institute of Technology KharagpurIndia; email: ddey3@asu.edu
Appears in Collections:Journal Publications [PH]

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