Showing 5 results for Researcher: Songxue Chi
July 1, 2024
5 MIN READ
A research team led by ORNL has bridged a knowledge gap in atomic-scale heat motion. This new understanding holds promise for enhancing materials to advance an emerging technology called solid-state cooling.
June 25, 2024
1 MIN READ
Scientific Achievement: Neutron scattering uncovered local magnon-phonon hybrid modes that triple cooling capacity of a magnetic shape memory alloy. Significance and Impact: This research reveals a path to develop better materials for solid-state cooling applications, which supports the societal need for cleaner, more efficient technologies.DOI: 10.1126/sciadv.adn2840
October 5, 2020
7 MIN READ
Led by ORNL and the University of Tennessee, Knoxville, a study of a solar-energy material with a bright future revealed a way to slow phonons, the waves that transport heat.
July 31, 2020
1 MIN READ
Scientific Achievement: Neutron scattering from photovoltaic methylammonium lead iodide reveals a giant effect of isotopic substitution on phonons due to coupling with molecule dynamics that results in enhanced thermal resistivity and increased hot-carrier cooling times.Significance and Impact: This route for keeping charge carriers hot longer bares new strategies for achieving record solar-to-electric conversion efficiency in novel hot carrier solar cells.DOI: 10.1126/sciadv.aaz1842
May 17, 2018
5 MIN READ
Researchers at the Department of Energy’s Oak Ridge National Laboratory made the first observations of waves of atomic rearrangements, known as phasons, propagating supersonically through a vibrating crystal lattice—a discovery that may dramatically improve heat transp...