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Physics > Computational Physics
Title: Strain-driven phonon topological phase transition impedes thermal transport in titanium monoxide
(Submitted on 24 Feb 2023 (v1), last revised 14 Mar 2024 (this version, v2))
Abstract: Topological phonon states in crystalline materials have attracted significant research interests due to their importance for fundamental physical phenomena, yet their implication on phonon thermal transport remains largely unexplored. Here, we use density functional theory calculations and symmetry analyses to explore topological phonon phase transitions under uniaxial strains and their tuning effects on thermal transport in titanium monoxide (TiO). Our calculation shows that application of 10% tension significantly diminishes lattice thermal conductivity of TiO by 77% and 66% along the a and c axes, respectively, at room temperature. This suppression is found to result largely from the breaking of symmetry protected degeneracy of acoustic branches, which induces a substantial enhancement of phonon scattering phase space due to the easier fulfillment of scattering selection rules. Our study provides evidence for the importance of phononic band topology in modulating thermal conductivity and offers a promising route towards controlling solid-state heat transport.
Submission history
From: Xin Jin [view email][v1] Fri, 24 Feb 2023 06:51:34 GMT (3809kb,D)
[v2] Thu, 14 Mar 2024 14:45:19 GMT (6615kb,D)
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