181 citations · 250 across the 4 of their papers we have counts for
5 papers
Phonon hydrodynamic regimes in sapphire
Takuya Kawabata, Kosuke Shimura, Yuto Ishii +7
When an ideal insulator is cooled, four regimes of thermal conductivity are expected to emerge one after another. Two of these, the Ziman and the Poiseuille, are hydrodynamic regim…
Phonon hydrodynamics in bulk insulators and semi-metals
Yo Machida, Valentina Martelli, Alexandre Jaoui +2
Decades ago, Gurzhi proposed that if momentum-conserving collisions prevail among heat-carrying phonons in insulators and charge-carrying electrons in metals, hydrodynamic features…
The phonon thermal Hall angle in black phosphorus
Xiaokang Li, Yo Machida, Alaska Subedi +3
The origin of phonon thermal Hall Effect (THE) observed in a variety of insulators is yet to be identified. Here, we report on the observation of a thermal Hall conductivity in a n…
Phonon hydrodynamics and ultrahigh-room-temperature thermal conductivity in thin graphite
Yo Machida, Nayuta Matsumoto, Takayuki Isono +1
Allotropes of carbon, such as diamond and graphene, are among the best conductors of heat. We monitored the evolution of thermal conductivity in thin graphite as a function of temp…
Observation of Poiseuille Flow of Phonons in Black Phosphorus
Yo Machida, Alaska Subedi, Kazuto Akiba +5
The travel of heat in insulators is commonly pictured as a flow of phonons scattered along their individual trajectory. In rare circumstances, momentum-conserving collision events…