58 citations · 77 across the 5 of their papers we have counts for
10 papers · 1 filter
Hybrid ab initio method for examining thermal properties in magnetic materials
Matthew Heine, Olle Hellman, David Broido
A hybrid ab initio theoretical approach for examining thermal properties in magnetic systems of unknown entropy is presented. Commonly used theoretical approaches interrogate therm…
Unraveling heat transport and dissipation in suspended MoSe crystals from bulk to monolayer
D. Saleta Reig, S. Varghese, R. Farris +14
Understanding thermal transport in layered transition metal dichalcogenide (TMD) crystals is crucial for a myriad of applications exploiting these materials. Despite significant ef…
Direct Observation of Chiral Phonons by Inelastic X-ray Scattering
Qingan Cai, Olle Hellman, Bin Wei +5
Phonon chirality has attracted intensive attention since it breaks the traditional cognition that phonons are linear propagating bosons. This new quasiparticle property has been ex…
The origin of the lattice thermal conductivity enhancement at the ferroelectric phase transition in GeTe
Đorđe Dangić, Olle Hellman, Stephen Fahy +1
The proximity to structural phase transitions in IV-VI thermoelectric materials is one of the main reasons for their large phonon anharmonicity and intrinsically low lattice therma…
Anharmonicity and Ultra-Low Thermal Conductivity in Lead-Free Halide Double Perovskites
Johan Klarbring, Olle Hellman, Igor A. Abrikosov +1
The lead-free halide double perovskite class of materials offers a promising venue for resolving issues related to toxicity of Pb and long-term stability of the lead-containing hal…
Impact of anharmonicity on sound wave velocities at extreme conditions
Olle Hellman, S. I. Simak
Theoretical calculations of sound-wave velocities of materials at extreme conditions are of great importance to various fields, in particular geophysics. For example, the seismic d…