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cond-mat.mtrl-sci2023★ 4 cited
Ultrafast polarization switching in BaTiO by photoactivation of its ferroelectric and central modes
Fangyuan Gu, Paul Tangney
We use molecular dynamics simulations with machine-learned atomistic force fields to simulate photoexcitation of BaTiO3 by a femtosecond laser pulse whose photon energy exceeds the…
cond-mat.stat-mech2023
Derivation of Bose-Einstein statistics from the uncertainty principle
Paul Tangney
The microstate of any degree of freedom of any classical dynamical system can be represented by a point in its two dimensional phase space. Since infinitely precise measurements ar…
cond-mat.mtrl-sci2023
Breakdown of phonon band theory in MgO
Gabriele Coiana, Johannes Lischner, Paul Tangney
We present a series of detailed images of the distribution of kinetic energy among frequencies and wavevectors in the bulk of an MgO crystal as it is heated slowly until it melts.…