JNCASR Scientists Discover Rare Wave-Like Heat Transport in Solids

JNCASR Scientists Discover Rare Wave-Like Heat Transport in Solids

Daily Current Affairs   /   JNCASR Scientists Discover Rare Wave-Like Heat Transport in Solids

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Category : Science and Tech Published on: February 17 2026

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  • Researchers at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru, have uncovered a novel mechanism of heat transport in the crystalline material Tl₂AgI₃, challenging conventional phonon gas theory. Unlike typical particle-like phonon scattering, the study shows a particle-to-wave crossover where heat propagates through wave-like coherence above 175 K. Local structural distortions and extreme lattice anharmonicity, guided by Pauling’s third rule, shorten phonon mean free paths, enabling this unusual behaviour.
  • Using synchrotron X-rays, Raman spectroscopy, thermal measurements, and first-principles calculations, the team confirmed a coherence-driven transport regime. This finding has implications for thermoelectrics and next-generation thermal management technologies.
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