Unusual wave-like heat transport in crystalline solid signals breakthrough converting waste heat in industries
Researchers at JNCASR have discovered an unusual wave-like heat transport regime in a copper chalcogenide material called thallium copper selenide (TlCu5Se3). This phenomenon results from confined ion diffusion and strong lattice anharmonicity, leading to ultralow lattice thermal conductivity and high thermoelectric performance. The findings could help convert industrial waste heat into electricity.
Why It Matters
This is relevant for competitive exam candidates tracking recent developments in science and technology, autonomous research institutions under the Department of Science and Technology, and new material breakthroughs from Indian research bodies like JNCASR.
In Simple Words
Scientists have found an unusual way heat moves in a copper chalcogenide material called thallium copper selenide (TlCu5Se3). Instead of traditional heat movement, thermal energy travels via wave-like coherence between different vibrational modes, creating ultralow lattice thermal conductivity.
This behavior is caused by confined ion dynamics and strong anharmonicity within a complex crystal structure. Led by researchers at JNCASR in Bengaluru, this breakthrough achieves high thermoelectric performance, opening doors to efficiently convert waste heat from industries into electricity.
Key Points
- Material studied: Thallium copper selenide (TlCu5Se3)
- Research institution: Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru
- Lead researcher: Prof. Kanishka Biswas
- Journal of publication: Science Advances
- Thermoelectric figure of merit (zT): 1.7
- Crystal structure: Tetragonal structure with a three-dimensional cloverleaf knot-like framework
- Key phenomenon: Wave-like coherence between vibrational modes and confined dynamic disorder of the Cu sublattice
- Potential application: Conversion of waste heat to electricity in power plants, cement industries, steel plants, automobiles, data centres, and battery heat management systems
Exam Angle
A. Thallium copper selenide (TlCu5Se3)
Source: Press Information Bureau