Electric-controlled tunable thermal switch based on Janus monolayer MoSSe

Abstract

The high-performance, wide-range tunable thermal switches play a significant role in the thermal management, high-power-density intelligent devices, energy systems, etc. However, traditional thermal switch components, such as thermal diodes, suffer from poor stability, small adjustability, low time efficiency, and difficult implementation. Herein, we propose the superior electric-controlled thermal switch (ECTS) based on Janus monolayer MoSSe. The high-effective and asymmetric regulation of the thermal conductivity driven by electric field demonstrates a wide-range adjustable thermal switch ratio, where the peak value reaches 2.09 under the electric field of 0.04 VÅ−1. The underlying mechanism is revealed by electronic structures that the interactions between electrons and phonons are renormalized due to the electric field driving charge density redistribution, which ultimately modulates the phonon anharmonicity. The high-efficiency adjustable ECTS component is expected to provide new inspiration for next-generation thermal management and information processing.

Effect of van der Waals homogeneous interface on lattice thermal conductivity of Janus WSSe bilayer

“…25) Meanwhile, highly effective and asymmetric regulation of thermal conductivity via an electric field in Janus TMDs has been revealed, implying a prominent electrically controlled thermal switch and thermoelectric applications. 26) Very recently, the vertical stacking of 2D layered materials with interfacial van der Waals interactions has gained widespread attention due to their flexible assembly configurations and interfacial novel emergent phenomena ranging from superconductivity to ferromagnetism. [27][28][29][30] Phonon transport may also be influenced by these artificially constructed van der Waals interfaces.…”

Phonon transport properties of Janus Pb2 XAs (X = P, Sb, and Bi) monolayers: A DFT study

“…Meanwhile, the thermal transport in semiconductors is mainly controlled by phonon transport, which makes the regulation of lattice thermal conductivity crucial. Up to today, applying external fields (force, electric, magnetic), [7][8][9] doping, [10] alloying, [11] and constructing superlattices [12] are popular strategies to reduce the κ L . In addition, finding materials with inherently low κ L will make regulation more efficient and further contribute to its application in fields such as thermoelectrics.…”

First-Principles Study on the Thermal Transport Properties of Monolayer 1T-Ag6X2 (X = S, Se, Te)

“…Thermal management materials are widely applied in the fields of electronic devices, optoelectronic devices, and thermoelectric devices, where they control the dispersion, storage, and conversion of heat within a system, − for example, thermal switches, heat sinks, , and other devices. Exploring the thermal transport properties of thermal management materials is critical for both material application and device design. − In particular, the extremely low lattice thermal conductivity (κ l ) of materials has garnered significant attention in the research community. , After decades of efforts, the κ l of materials are controlled to 0.5–2 W/mK at room temperature, − such as bulk Au 2 S exhibits κ l of 1.99 W/mK, the κ l of penta-Sb 2 C is 0.88 W/mK, the κ l of two-dimensional tellurene is merely 0.61 W/mK .…”