Olivier Delaire, Associate Professor of Mechanical Engineering and Materials Science and Physics and Faculty Network Member of The Energy Initiative  

Olivier Delaire

Office Location: Physics
Office Phone: (919) 660-5310
Email Address:

Education:
Ph.D., California Institute of Technology, 2006
M.Sc., Pennsylvania State University, 2000
Diplôme d’Ingénieur, Ecole Centrale Lyon, France, 1999

Research Description: Olivier Delaire is an expert in the field of atomic dynamics in materials, with 15-plus years of experience in both experimental and computational studies of lattice dynamics (phonons).

Recent Publications   (More Publications)

  1. Bansal, D; Niedziela, JL; Sinclair, R; Garlea, VO; Abernathy, DL; Chi, S; Ren, Y; Zhou, H; Delaire, O, Momentum-resolved observations of the phonon instability driving geometric improper ferroelectricity in yttrium manganite, Nature Communications, vol. 9 no. 1 (December, 2018) [doi]  [abs].
  2. Jain, P; Bansal, D; Sharma, G; Bhattacharya, A; Ingale, B; Delaire, O; Chatterjee, R, Observation of low temperature metastable states in complex CaMn7O12., Journal of Physics: Condensed Matter (January, 2018) [doi]  [abs].
  3. Luo, C; Bansal, D; Li, J; Viehland, D; Winn, B; Ren, Y; Li, X; Luo, H; Delaire, O, Neutron and x-ray scattering study of phonon dispersion and diffuse scattering in (Na,Bi)Ti O3-xBaTi O3 single crystals near the morphotropic phase boundary, Physical Review B, vol. 96 no. 17 (November, 2017) [doi]  [abs].
  4. Mukhopadhyay, S; Bansal, D; Delaire, O; Perrodin, D; Bourret-Courchesne, E; Singh, DJ; Lindsay, L, The curious case of cuprous chloride: Giant thermal resistance and anharmonic quasiparticle spectra driven by dispersion nesting, Physical Review B, vol. 96 no. 10 (September, 2017) [doi] .
  5. Berlijn, T; Snijders, PC; Delaire, O; Zhou, H-D; Maier, TA; Cao, H-B; Chi, S-X; Matsuda, M; Wang, Y; Koehler, MR; Kent, PRC; Weitering, HH, Itinerant Antiferromagnetism in RuO_{2}., Physical Review Letters, vol. 118 no. 7 (February, 2017), pp. 077201 [doi]  [abs].

Highlight:

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.