Associate Professor of Mechanical Engineering and Materials Science
Associate Professor of Physics (Secondary)
Associate Professor of Chemistry (Secondary)
Faculty Network Member of The Energy Initiative
Olivier Delaire's research program investigates atomistic transport processes of energy and charge, and thermodynamics in energy materials (DOE Early Career Award 2014). His research group studies elementary excitations in condensed-matter systems (phonons, electrons, spins), their couplings (phonon-phonon interaction, electron-phonon coupling, spin-phonon coupling), and their effects on macroscopic material properties. Current materials of interest include thermoelectrics, ferroelectrics/multiferroics, spin-caloritronics, and photovoltaics. We develop new methods to reveal microscopic underpinnings of thermal transport, by integrating neutron and x-ray scattering measurements with quantum-mechanical computer simulations. This combined experimental and computational approach opens a new window to understand and control microscopic energy transport for the design of materials with novel properties (thermoelectrics, spin-caloritronics), and to rationalize multiferroics and metal-insulator transitions. In addition to state-of-the-art scattering experiments and first-principles simulations, our team also uses transport measurements, optical spectroscopy, materials synthesis, calorimetry, and thermal characterization, with the goal of gaining deeper atomistic understanding for developing future materials.
Ding, Jingxuan, et al. “Anharmonic lattice dynamics and superionic transition in AgCrSe2.” Proceedings of the National Academy of Sciences, vol. 117, no. 8, Proceedings of the National Academy of Sciences, Feb. 2020, pp. 3930–37. Crossref, doi:10.1073/pnas.1913916117. Full Text Open Access Copy
He, Xing, et al. “Anharmonic Eigenvectors and Acoustic Phonon Disappearance in Quantum Paraelectric SrTiO3.” Physical Review Letters, vol. 124, no. 14, American Physical Society (APS), 2020. Manual, doi:10.1103/physrevlett.124.145901. Full Text
Bansal, Dipanshu, et al. “Magnetically driven phonon instability enables the metal–insulator transition in h-FeS.” Nature Physics, Springer Science and Business Media LLC, 2020. Manual, doi:10.1038/s41567-020-0857-1. Full Text
Bansal, D., et al. “Lattice dynamics of the hybrid improper ferroelectrics (Ca,Sr)3Ti2 O7.” Physical Review B, vol. 100, no. 21, Dec. 2019. Scopus, doi:10.1103/PhysRevB.100.214304. Full Text
Neu, J., et al. “Orthorhombic to monoclinic phase transition in NbNiTe2.” Physical Review B, vol. 100, no. 14, Oct. 2019. Scopus, doi:10.1103/PhysRevB.100.144102. Full Text
Li, F., et al. “High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique.” Journal of Applied Crystallography, vol. 52, no. 4, Aug. 2019, pp. 755–60. Scopus, doi:10.1107/S1600576719008008. Full Text
Leiner, J. C., et al. “Frustrated Magnetism in Mott Insulating (V1-xCrx)2 O3.” Physical Review X, vol. 9, no. 1, Feb. 2019. Scopus, doi:10.1103/PhysRevX.9.011035. Full Text
Niedziela, J. L., et al. “Selective breakdown of phonon quasiparticles across superionic transition in CuCrSe 2.” Nature Physics, vol. 15, no. 1, Jan. 2019, pp. 73–78. Scopus, doi:10.1038/s41567-018-0298-2. Full Text Open Access Copy
Bansal, D., et al. “Momentum-resolved observations of the phonon instability driving geometric improper ferroelectricity in yttrium manganite.” Nature Communications, vol. 9, no. 1, Dec. 2018. Scopus, doi:10.1038/s41467-017-02309-2. Full Text Open Access Copy
Wall, Simon, et al. “Ultrafast disordering of vanadium dimers in photoexcited VO2.” Science, vol. 362, no. 6414, American Association for the Advancement of Science (AAAS), Nov. 2018, pp. 572–76. Crossref, doi:10.1126/science.aau3873. Full Text
Muy, Sokseiha, et al. “Mobility and stability descriptors of lithium ion conductors based on lattice dynamics.” Abstracts of Papers of the American Chemical Society, vol. 255, AMER CHEMICAL SOC, 2018.
Borreguero, J. M., et al. “Integrating advanced materials simulation techniques into an automated data analysis workflow at the spallation neutron source.” Tms Annual Meeting, 2014, pp. 297–308. Scopus, doi:10.1002/9781118889879.ch39. Full Text
Delaire, O., et al. “Entropy of the γ- α martensitic transformation in Fe 71Ni29.” Proceedings of an International Conference on Solid Solid Phase Transformations in Inorganic Materials 2005, vol. 2, 2005, pp. 75–80.
Delaire, O., et al. “Vibrational thermodynamics of vanadium and dilute vanadium alloys.” Proceedings of an International Conference on Solid Solid Phase Transformations in Inorganic Materials 2005, vol. 2, 2005, pp. 359–74.
Delaire, Olivier, et al. “Entropy of the gamma-alpha martensitic transformation in Fe71Ni29.” Solid Solid Phase Transformations in Inorganic Material 2005, Vol 2, edited by J. M. Howe et al., MINERALS, METALS & MATERIALS SOC, 2005, pp. 75–80.
Manley, M. E., et al. “The importance of high temperature electron-phonon coupling to the thermodynamic properties of Ce0.9Th0.1 and other f-electron bonded metals.” Actinides Basic Science, Applications and Technology, edited by L. Soderholm et al., vol. 802, MATERIALS RESEARCH SOCIETY, 2004, pp. 47–52.
Motta, A. T., et al. “Synchrotron radiation study of secondphase particles and alloying elements in zirconium alloys.” Astm Special Technical Publication, no. 1423, 2002, pp. 59–77.
Delaire, Olivier. Final Technical Report - DOE Early Career award DE-SC0016166, "Quasiparticle Couplings in Transport of Heat, Charge, and Spin for Novel Energy Materials". Office of Scientific and Technical Information (OSTI). Crossref, doi:10.2172/1594952. Full Text