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The temperature ($\it T$) dependence of electrical resistivity in graphene has been experimentally investigated between 10 and 400 K for samples prepared on various substrates; HfO$_2$, SiO$_2$ and h-BN. The resistivity of graphene shows a…

介观与纳米尺度物理 · 物理学 2019-07-29 Y. G. You , J. H. Ahn , B. H. Park , Y. Kwon , E. E. B. Campbell , S. H. Jhang

Graphene is a two-dimensional (2D) material with over 100-fold anisotropy of heat flow between the in-plane and out-of-plane directions. High in-plane thermal conductivity is due to covalent sp2 bonding between carbon atoms, whereas…

材料科学 · 物理学 2013-01-29 Eric Pop , Vikas Varshney , Ajit K. Roy

We present an investigation of heat transport in gapless graphene-based Ferromagnetic /singlet Superconductor/Ferromagnetic (FG$\mid$SG$\mid$FG) junctions. We find that unlike uniform increase of thermal conductance vs temperature, the…

超导电性 · 物理学 2011-11-01 Morteza Salehi , Mohammad Alidoust , Yousef Rahnavard , Gholamreza Rashedi

The authors report on synthesis and thermal properties of the electrically-conductive thermal interface materials with the hybrid graphene-metal particle fillers. The thermal conductivity of resulting composites was increased by ~500% in a…

介观与纳米尺度物理 · 物理学 2015-06-04 Vivek Goyal , Alexander A. Balandin

The author reports an experimental study of electrical and thermal transport in reduced graphene oxide (RGO)/polystyrene (PS) composites. The electrical conductivity ($\sigma$) of RGO/PS composites with different RGO concentrations at room…

材料科学 · 物理学 2017-02-28 Wonjun Park , Jiuning Hu , Luis A. Jauregui , Xiulin Ruan , Yong P. Chen

Ultrawide-bandgap rutile GeO2 is emerging as a promising semiconductor for power electronics, where efficient heat dissipation is essential to suppress self-heating and ensure device reliability. However, the temperature dependence and…

Recent studies showed that the in-plane and inter-plane thermal conductivities of two-dimensional (2D) MoS2 are low, posing a significant challenge in heat management in MoS2-based electronic devices. To address this challenge, we design…

材料科学 · 物理学 2017-03-29 Xiangjun Liu , Junfeng Gao , Gang Zhang , Yong-Wei Zhang

Graphene has a high intrinsic thermal conductivity and a high electron mobility. The thermal conductivity of graphene can be significantly reduced when different carbon isotopes are mixed, which can enhance the performance of thermoelectric…

介观与纳米尺度物理 · 物理学 2020-05-20 Eric Whiteway , Michael Hilke

Using calculations from first principles we have investigated the lattice thermal conductivity of ideal mono- and bi-layer graphene sheets. Our results demonstrate that the intrinsic thermal conductivity of both mono- and bi-layer graphene…

材料科学 · 物理学 2009-02-05 B. D. Kong , S. Paul , M. Buongiorno Nardelli , K. W. Kim

The thermal conductivity of monolayer graphene is an outstanding challenge with no consensus reached on its exact value and length convergence so far. We consider four-phonon scattering, phonon renormalization, and an exact solution to…

介观与纳米尺度物理 · 物理学 2023-10-02 Zherui Han , Xiulin Ruan

Allotropes of carbon, such as diamond and graphene, are among the best conductors of heat. We monitored the evolution of thermal conductivity in thin graphite as a function of temperature and thickness and found an intimate link between…

材料科学 · 物理学 2020-03-25 Yo Machida , Nayuta Matsumoto , Takayuki Isono , Kamran Behnia

The deposition of a thin oxide layer at metal/semiconductor interfaces has been previously reported as a means of reducing contact resistance in 2D electronics. Using X-ray photoelectron spectroscopy with in-situ Ti deposition, we fabricate…

材料科学 · 物理学 2019-10-10 Keren M. Freedy , David H. Olson , Patrick E. Hopkins , Stephen J. McDonnell

Transport properties of multigraphene layers on 6H-SiC substrates fabricated by thermal graphitization of SiC were studied. The principal result is that these structures were shown to contain a nearly perfect graphene layer situated between…

Graphene was recently proposed as a material for heat removal owing to its extremely high thermal conductivity. We simulated heat propagation in silicon-on-insulator circuits with and without graphene lateral heat spreaders. Numerical…

材料科学 · 物理学 2010-02-06 Samia Subrina , Dmitri Kotchetkov , Alexander A. Balandin

The temperature dependence of electric transport properties of single-layer and few-layer graphene at large charge doping is of great interest both for the study of the scattering processes dominating the conductivity at different…

介观与纳米尺度物理 · 物理学 2016-09-02 R. S. Gonnelli , F. Paolucci , E. Piatti , Kanudha Sharda , A. Sola , M. Tortello , Jijeesh R. Nair , C. Gerbaldi , M. Bruna , S. Borini

We examine thermal transport in graphene supported on SiO2 using molecular dynamics simulations. Coupling to the substrate reduces the thermal conductivity (TC) of supported graphene by an order of magnitude, due to damping of the flexural…

介观与纳米尺度物理 · 物理学 2015-03-17 Zhun-Yong Ong , Eric Pop

Electrical and thermal transport across material interfaces is key for 2D electronics in semiconductor technology, yet their relationship remains largely unknown. We report a theoretical proposal to separate electronic and phononic…

介观与纳米尺度物理 · 物理学 2024-07-23 Linxin Zhai , Zhiping Xu

Understanding the physical processes involved in interfacial heat transfer is critical for the interpretation of thermometric measurements and the optimization of heat dissipation in nanoelectronic devices that are based on transition metal…

介观与纳米尺度物理 · 物理学 2021-01-12 Zhun-Yong Ong , Yongqing Cai , Gang Zhang , Yong-Wei Zhang

Thermal conduction was explored and discussed through a combined theoretical and simulation approach in this work. The thermal conductivity k of polycrystalline graphene was calculated by molecular dynamics simulations based on a hexagonal…

材料科学 · 物理学 2014-06-05 Yanlei Wang , Zhigong Song , Zhiping Xu

We study the heat transfer between graphene and amorphous SiO2. We include both the heat transfer from the area of real contact, and between the surfaces in the non-contact region. We consider the radiative heat transfer associated with the…

软凝聚态物质 · 物理学 2010-07-23 B. N. J. Persson , H. Ueba