Open AccessPosted Content
Thermal Conductance Across Harmonic-matched Epitaxial Al-sapphire Heterointerfaces: A Benchmark for Metal-nonmetal Interfaces
Zhe Cheng,Yee Rui Koh,Habib Ahmad,Renjiu Hu,Jingjing Shi,Michael E. Liao,Yekan Wang,Tingyu Bai,Ruiyang Li,Eungkyu Lee,Luke Yates,Tengfei Luo,Mark S. Goorsky,William A. Doolittle,Zhiting Tian,Patrick E. Hopkins,Samuel Graham +16 more
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The article was published on 2019-06-13 and is currently open access. It has received 14 citations till now. The article focuses on the topics: Sapphire.read more
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Applications and Impacts of Nanoscale Thermal Transport in Electronics Packaging
Ronald J. Warzoha,Adam A. Wilson,Brian F. Donovan,Nazli Donmezer,Ashutosh Giri,Patrick E. Hopkins,Sukwon Choi,Darshan G. Pahinkar,Jingjing Shi,Samuel Graham,Zhiting Tian,Laura B. Ruppalt +11 more
TL;DR: In this paper, the authors highlight the importance of nanoscale thermal transport mechanisms at each layer in material hierarchies that make up modern electronic devices, including those mechanisms that impact thermal transport through: substrates, interfaces and two-dimensional materials, and heat spreading materials.
Journal ArticleDOI
Thermal transport in defective and disordered materials
Riley Hanus,Ramya Gurunathan,Lucas Lindsay,Matthias T. Agne,Jingjing Shi,Samuel Graham,G. Jeffrey Snyder +6 more
TL;DR: This review attempts to build a holistic understanding of thermal transport by focusing on the often unaddressed relationships between subfields, which can be critical for multi-scale modeling approaches.
Journal ArticleDOI
Experimental Observation of High Intrinsic Thermal Conductivity of AlN
Zhe Cheng,Yee Rui Koh,Abdullah Mamun,Jingjing Shi,Tingyu Bai,Kenny Huynh,Luke Yates,Zeyu Liu,Ruiyang Li,Eungkyu Lee,Michael E. Liao,Yekan Wang,Hsuan Ming Yu,Maki Kushimoto,Tengfei Luo,Mark S. Goorsky,Patrick E. Hopkins,Hiroshi Amano,Asif Khan,Samuel Graham +19 more
TL;DR: In this paper, the authors reported the growth of AlN layers by MOCVD with an air pocketed AlN layer and the first experimental observation of intrinsic thermal conductivity from 130 K to 480 K that matches density function-theory calculations for single crystal AlN, producing some of the highest values ever measured.
Journal ArticleDOI
Thermal boundary conductance across epitaxial metal/sapphire interfaces
Yee Rui Koh,Jingjing Shi,Baiwei Wang,Renjiu Hu,Habib Ahmad,Sit Kerdsongpanya,Erik Milosevic,W. Alan Doolittle,Daniel Gall,Zhiting Tian,Samuel Graham,Patrick E. Hopkins +11 more
TL;DR: In this paper, the authors report on the thermal conductance across interfaces between various epitaxially grown metal films (Co, Ru, and Al) and $c$-plane sapphire substrates via time-domain thermoreflectance over the temperature range of 80 to 500 K.
Journal ArticleDOI
Bulk-like Intrinsic Phonon Thermal Conductivity of Micrometer-Thick AlN Films.
Yee Rui Koh,Zhe Cheng,Abdullah Mamun,Shafkat Bin Hoque,Zeyu Liu,Tingyu Bai,Kamal Hussain,Michael E. Liao,Ruiyang Li,John T. Gaskins,Ashutosh Giri,John A. Tomko,Jeffrey L. Braun,Mikhail Gaevski,Eungkyu Lee,Luke Yates,Mark S. Goorsky,Tengfei Luo,Asif Khan,Samuel Graham,Patrick E. Hopkins +20 more
TL;DR: The measured thermal conductivities in high-quality AlN thin films are found to be constant, and similar to bulk AlN, regardless of heat penetration depth, film thickness or laser spot size, even when these characteristic length scales are less than the mean free paths of a considerable portion of thermal phonons.
References
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Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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TL;DR: VESTA has been upgraded to the latest version, VESTA 3, implementing new features including drawing the external morphology of crystals, and an extended bond-search algorithm to enable more sophisticated searches in complex molecules and cage-like structures.
Posted Content
First principles phonon calculations in materials science
Atsushi Togo,Isao Tanaka +1 more
TL;DR: In this article, the authors demonstrate phonon properties with fundamental equations and show examples how the phonon calculations are applied in materials science, and demonstrate the importance of first principles phonon calculation in dynamical behaviors and thermal properties.
Journal ArticleDOI
Nanoscale thermal transport
David G. Cahill,Wayne K. Ford,Kenneth E. Goodson,Gerald D. Mahan,Arun Majumdar,Humphrey J. Maris,Roberto Merlin,Simon R. Phillpot +7 more
TL;DR: A review of the literature on thermal transport in nanoscale devices can be found in this article, where the authors highlight the recent developments in experiment, theory and computation that have occurred in the past ten years and summarizes the present status of the field.