Progress in thermal rectification due to heat conduction in micro/nano solids

Zhao, Haibo; Yang, Xiaona; Wang, Chunyang; Lu, Rui; Zhang, Ting; Chen, Haisheng; Zheng, Xinghua

doi:10.1016/j.mtphys.2022.100941

Cited by 13 publications

(10 citation statements)

References 110 publications

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“…It is worth noting that electron heat rectification exists even at very small temperature bias (∆T → 0), indicating that electron thermal conductances exhibit temperature bias direction-dependent behavior. This behavior has also been observed in phonon thermal conductances [6]. In previous figures (Fig.…”

Section: E Electron Heat Current Of Sctsssupporting

confidence: 80%

“…where we have ò L = ε − E e,L + iΓ e,L and ò R = ε − E e,R + iΓ e,R in equation (6). The intra-TS and inter-TS two-particle correlation functions are denoted by 〈n ℓ, −σ n ℓ, σ 〉 and 〈n ℓ, σ n j, σ 〉 (〈n ℓ, −σ n j, σ 〉), respectively.…”

Section: Electron Heat Current Of Sctssmentioning

confidence: 99%

“…These two factors contribute to the direction-dependent character of the transmission coefficient with temperature bias ΔT. The asymmetrical electron heat rectification behavior (Q F > |Q B |) displayed in figure 10(b) can be understood by considering the P 1 channel of equation (6). Notably, the probability weight of P 1 in  e RL ( ) under reversed temperature bias can be obtained by exchanging the indices of L and R in  e LR ( ).…”

Section: Electron Heat Current Of Sctssmentioning

confidence: 99%

“…Thermal rectification, a widely studied phenomenon in condensed matter physics, refers to the asymmetric heat flow within a material or system, where heat preferentially conducts in one direction over the other [1][2][3][4][5][6]. This property holds significant implications for various fields, including thermal management, energy conversion, and nanoscale heat transfer [1][2][3][4][5][6]. Consequently, considerable efforts have been devoted to developing heat diodes (HDs) capable of rectifying heat flow .…”

Section: Introductionmentioning

confidence: 99%

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Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

Kuo

2023

Nanotechnology

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We present a theoretical investigation of electron heat current in asymmetrical length armchair graphene nanoribbon (AGNR) heterostructures with vacancies, focusing on the topological states (TSs). In particular, we examine the 9-7-9 AGNR heterostructures where the TSs are well-isolated from the conduction and valence subbands. This isolation effectively mitigates thermal noise of subbands arising from temperature fluctuations during charge transport. Moreover, when the TSs exhibit an orbital off-set, intriguing electron heat rectification phenomena are observed, primarily attributed to inter-TS electron Coulomb interactions. To enhance the heat rectification ratio (η Q ), we manipulate the coupling strengths between the heat sources and the TSs by introducing asymmetrical lengths in the 9-AGNRs. This approach offers control over the rectification properties, enabling significant enhancements. Additionally, we introduce vacancies strategically positioned between the heat sources and the TSs to suppress phonon heat current. This arrangement effectively reduces the overall phonon heat current, while leaving the TSs unaffected. Our findings provide valuable insights into the behavior of electron heat current in AGNR heterostructures, highlighting the role of topological states, inter-TS electron Coulomb interactions, and the impact of structural modifications such as asymmetrical lengths and vacancy positioning. These results pave the way for the design and optimization of graphene-based devices with improved thermal management and efficient control of electron heat transport.

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Section: E Electron Heat Current Of Sctsssupporting

confidence: 80%

Section: Electron Heat Current Of Sctssmentioning

confidence: 99%

Section: Electron Heat Current Of Sctssmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

Kuo

2023

Nanotechnology

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“…Doping and defects are suggested to be concentrated in a certain area of the material with ordered or asymmetric distributions. However, under the existing experimental conditions, it is difficult to achieve patterned and refined distributions [99], so further development of related technologies is necessary to support the implementation of this manipulation strategy.…”

Section: Asymmetric Doping and Defects Structuresmentioning

confidence: 99%

A brief review on the recent development of phonon engineering and manipulation at nanoscales

Xie,

Zhu,

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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Phonons are the quantum mechanical descriptions of vibrational modes that manifest themselves in many physical properties of condensed matter systems. As the size of electronic devices continues to decrease below mean free paths of acoustic phonons, the engineering of phonon spectra at the nanoscale becomes an important topic. Phonon manipulation allows for active control and management of heat flow, enabling functions such as regulated heat transport. At the same time, phonon transmission, as a novel signal transmission method, holds great potential to revolutionize modern industry like microelectronics technology, and boasts wide-ranging applications. Unlike fermions such as electrons, polarity regulation is difficult to act on phonons as bosons, making the development of effective phonon modulation methods a daunting task. This work reviews the development of phonon engineering and strategies of phonon manipulation at different scales, reports the latest research progress of nanophononic devices such as thermal rectifiers, thermal transistors, thermal memories, and thermoelectric devices, and analyzes the phonon transport mechanisms involved. Lastly, we survey feasible perspectives and research directions of phonon engineering. Thermoelectric analogies, external field regulation, and acousto-optic co-optimization are expected to become future research hotspots.

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Unconventional Thermal Rectification in Assemblies of Supertetrahedral T₃-Type Sn₄In₆Se₂₀ Clusters

Du,

Kawazoe,

Sun

2024

Nano Lett.

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Going beyond the conventional design paradigm with atoms as building blocks, we propose the concept of clusterassembled thermal rectifiers comprising metal chalcogenide supertetrahedral clusters. Different from the experimentally reported T 4,∞ and T 5,∞ , for the first time we assemble T 3 -Sn 4 In 6 Se 20 clusters into a stable T 3,∞ framework without needing extra ions, based on which the thermal rectification (TR) effect is explored using machine-learning molecular dynamics and the mode-resolved phonon Boltzmann transport equation. The tetrahedron-shaped cluster assembly serves as a novel TR switch, where the open state shows an outstanding TR efficiency (∼40%) arising from the asymmetric lateral confinement due to not only the phonon particle behavior but also the phonon wave nature. The prism-shaped assembly has a symmetric skeleton but with asymmetric surface roughness induced by clusters, thus exhibiting an unusual TR effect, distinguished from atom-based symmetric systems with atomically flat surfaces. Our findings demonstrate the unique potential of cluster assemblies for unconventional thermal rectification.

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Progress in thermal rectification due to heat conduction in micro/nano solids

Cited by 13 publications

References 110 publications

Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

A brief review on the recent development of phonon engineering and manipulation at nanoscales

Unconventional Thermal Rectification in Assemblies of Supertetrahedral T₃-Type Sn₄In₆Se₂₀ Clusters

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Progress in thermal rectification due to heat conduction in micro/nano solids

Cited by 13 publications

References 110 publications

Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

Thermal rectification through the topological states of asymmetrical length armchair graphene nanoribbons heterostructures with vacancies

A brief review on the recent development of phonon engineering and manipulation at nanoscales

Unconventional Thermal Rectification in Assemblies of Supertetrahedral T3-Type Sn4In6Se20 Clusters

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Product

Resources

About

Unconventional Thermal Rectification in Assemblies of Supertetrahedral T₃-Type Sn₄In₆Se₂₀ Clusters