Physical Review B
Thermal transport properties and some hydrodynamic-like behavior in three-dimensional topological semimetal ZrTe₅
Physical Review B · 105, 085132 (2022)
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Introduction
Thermal and electrical transport in ZrTe₅ are compared between ballistic and diffusive regimes. The evolution of thermal conductivity and a nonmonotonic effective mean free path support a hydrodynamic-like regime.
A closer reading
The qualifier ‘hydrodynamic-like’ is important. Several transport signatures support the interpretation, while phonons and charged quasiparticles can both carry heat; the field dependence helps probe their respective roles.