2.8k citations · 2.9k across the 8 of their papers we have counts for
9 papers
Influence of local symmetry on lattice dynamics coupled to topological surface states
Jonathan A. Sobota, Samuel W. Teitelbaum, Yijing Huang +18
We investigate coupled electron-lattice dynamics in the topological insulator Bi2Te3 with time-resolved photoemission and time-resolved x-ray diffraction. It is well established th…
Structural and thermal transport properties of ferroelectric domain walls in GeTe from first principles
Đorđe Dangić, Éamonn D. Murray, Stephen Fahy +1
Ferroelectric domain walls are boundaries between regions with different polarization orientations in a ferroelectric material. Using first principles calculations, we characterize…
Evolution of non-thermal phonon and electron populations in photo-excited germanium on picosecond timescales
F. Murphy-Armando, É. D. Murray, I. Savić +3
We investigate from first-principles theory and experiment the generation of phonons on picosecond timescales and the relaxation of carriers in multiple conduction band valleys of…
Measurements of Nonequilibrium Interatomic Forces in Photoexcited Bismuth
Samuel W. Teitelbaum, Thomas C. Henighan, Hanzhe Liu +11
We determine experimentally the excited-state interatomic forces in photoexcited bismuth. The forces are obtained by a constrained least-squares fit of the excited-state dispersion…
Ultrafast relaxation of symmetry-breaking photo-induced atomic forces
Shane M. O'Mahony, Felipe Murphy-Armando, Éamonn D. Murray +3
We present a first-principles method for the calculation of the temperature-dependent relaxation of symmetry-breaking atomic driving forces in photoexcited systems. We calculate th…
Acoustic-Soft Optical Mode Coupling Leads to Negative Thermal Expansion of GeTe near the Ferroelectric Phase Transition
Đorđe Dangić, Aoife R. Murphy, Éamonn D. Murray +2
GeTe is a well-known ferroelectric and thermoelectric material that undergoes a structural phase transition from a rhombohedral to the rocksalt structure at K. We pr…