Associate Professor of Mechanical Engineering and Materials Science
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.
Delaire, O., and B. Fultz. “Charge redistribution and phonon entropy of vanadium alloys..” Physical Review Letters, vol. 97, no. 24, Dec. 2006. Epmc, doi:10.1103/physrevlett.97.245701. Full Text
Delaire, O., et al. “Vibrational entropy of the γ- Martensitic transformation in Fe 71Ni29.” Philosophical Magazine, vol. 85, no. 30, Oct. 2005, pp. 3567–83. Scopus, doi:10.1080/14786430500228606. Full Text
Delaire, O., et al. “Vibrational entropy of the gamma-alpha martensitic transformation in Fe71Ni29.” Philosophical Magazine, vol. 85, no. 30, TAYLOR & FRANCIS LTD, Oct. 2005, pp. 3567–83. Wos, doi:10.1080/14786430500228606. Full Text
Swan-Wood, T. L., et al. “Vibrational entropy of spinodal decomposition in FeCr.” Physical Review B Condensed Matter and Materials Physics, vol. 72, no. 2, July 2005. Scopus, doi:10.1103/PhysRevB.72.024305. Full Text
Yue, A. F., et al. “Vibrations of micro-eV energies in nanocrystalline microstructures..” Physical Review Letters, vol. 93, no. 20, Nov. 2004. Epmc, doi:10.1103/physrevlett.93.205501. Full Text
Delaire, O., et al. “Negative entropy of mixing for vanadium-platinum solutions..” Physical Review Letters, vol. 93, no. 18, Oct. 2004. Epmc, doi:10.1103/physrevlett.93.185704. Full Text
Yilmazbayhan, A., et al. “Determination of the alloying content in the matrix of Zr alloys using synchrotron radiation microprobe X-ray fluorescence.” Journal of Nuclear Materials, vol. 321, no. 2–3, Sept. 2003, pp. 221–32. Scopus, doi:10.1016/S0022-3115(03)00267-8. Full Text
Manley, M. E., et al. “No role for phonon entropy in the fcc-fcc volume collapse transition in Ce0.9Th0.1 at ambient pressure.” Physical Review B, vol. 67, no. 1, Jan. 2003. Manual, doi:10.1103/PhysRevB.67.014103. Full Text
Erwin, K. T., et al. “Observation of second-phase particles in bulk zirconium alloys using synchrotron radiation.” Journal of Nuclear Materials, vol. 294, no. 3, Apr. 2001, pp. 299–304. Scopus, doi:10.1016/S0022-3115(01)00436-6. Full Text
Jiang, M. P., et al. Photoinduced suppression of the ferroelectric instability in PbTe.