194 citations · 945 across the 28 of their papers we have counts for
28 papers
Ruddlesden-Popper chalcogenides push the limit of mechanical stiffness and glass-like thermal conductivity in single crystals
Md Shafkat Bin Hoque, Eric R. Hoglund, Boyang Zhao +20
Insulating materials featuring ultralow thermal conductivity for diverse applications also require robust mechanical properties. Conventional thinking, however, which correlates st…
Photoconductive Effects in Single Crystals of BaZrS
Boyang Zhao, Huandong Chen, Ragib Ahsan +11
Chalcogenide perovskites, such as BaZrS, are emerging semiconductors with potential for high photovoltaic power conversion efficiency. The role of defects in the efficiency of…
Validation of the Wiedemann-Franz Law in solid and molten tungsten above 2000 K through thermal conductivity measurements via steady state temperature differential radiometry
Milena Milich, Hunter B. Schonfeld, Konstantinos Boboridis +8
We measure the thermal conductivity of solid and molten tungsten using Steady State Temperature Differential Radiometry. We demonstrate that the thermal conductivity can be well de…
Predictions and Measurements of Thermal Conductivity of Ceramic Materials at High Temperature
Zherui Han, Zixin Xiong, William T. Riffe +8
The lattice thermal conductivity () of two ceramic materials, cerium dioxide (CeO) and magnesium oxide (MgO), is computed up to 1500 K using first principles and the phonon…
Design rules for the thermal and elastic properties of rare-earth disilicates
Cormac Toher, Mackenzie J. Ridley, Kathleen Q. Tomko +4
Rare-earth silicates are the current standard material for use as environmental barrier coatings for SiC-based ceramic matrix composites as hot-section components in gas-turbine en…
Ablation threshold and temperature dependent thermal conductivity of high entropy carbide thin films
Milena Milich, Kathleen Quiambao-Tomko, John Tomko +2
High entropy carbides (HECs) are a promising new class of ultra-high temperature ceramics that could provide novel material solutions for leading edges of hypersonic vehicles, whic…
On the thermal and mechanical properties of MgCoNiCuZnO across the high-entropy to entropy-stabilized transition
Christina M. Rost, Daniel L. Schmuckler, Clifton Bumgardner +7
As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek further understanding of property changes across the phase boundary between…
Direct Visualization of Localized Vibrations at Complex Grain Boundaries
Eric R. Hoglund, De-Liang Bao, Andrew O'Hara +7
Grain boundaries (GBs) are a prolific microstructural feature that dominates the functionality of a wide class of materials. The change in functionality at a GB is a direct result…
Orientation Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS3
Boyang Zhao, Md Shafkat Bin Hoque, Gwan Yeong Jung +17
Low-dimensional materials with chain-like (one-dimensional) or layered (twodimensional) structures are of significant interest due to their anisotropic electrical, optical, thermal…
Plasma-induced surface cooling
John A. Tomko, Michael J. Johnson, David R. Boris +3
Here we show that, despite a massive incident flux of energetic species, plasmas can induce transient cooling of a material surface. Using time-resolved optical thermometry in-situ…
Nanoscale Phonon Spectroscopy Reveals Emergent Interface Vibrational Structure of Superlattices
Eric R. Hoglund, De-Liang Bao, Andrew O'Hara +16
As the length-scales of materials decrease, heterogeneities associated with interfaces approach the importance of the surrounding materials. Emergent electronic and magnetic interf…
Interface controlled thermal properties of ultra-thin chalcogenide-based phase change memory devices
Kiumars Aryana, John T. Gaskins, Joyeeta Nag +10
Phase change memory (PCM) is a rapidly growing technology that not only offers advancements in storage-class memories but also enables in-memory data storage and processing towards…
Long-lived modulation of plasmonic absorption by ballistic thermal injection
John A. Tomko, Evan L. Runnerstrom, Yi-Siang Wang +9
Energy and charge transfer across metal-semiconductor interfaces are the fundamental driving forces for a broad range of applications, such as computing, energy harvesting, and pho…
Monolayer Vanadium-doped Tungsten Disulfide: A Room-Temperature Dilute Magnetic Semiconductor
Fu Zhang, Boyang Zheng, Amritanand Sebastian +18
Dilute magnetic semiconductors, achieved through substitutional doping of spin-polarized transition metals into semiconducting systems, enable experimental modulation of spin dynam…
Heat Diffusion Imaging: In-Plane Thermal Conductivity Measurement of Thin Films in a Broad Temperature Range
T. Zhu, D. H. Olson, P. E. Hopkins +1
This work combines the principles of the heat spreader method and imaging capability of the thermoreflectance measurements to measure the in-plane thermal conductivity of thin-film…
The physical and mechanical properties of hafnium orthosilicate: experiments and first-principles calculations
Zhidong Ding, Mackenzie Ridley, Jeroen Deijkers +8
Hafnium orthosilicate (HfSiO4: hafnon) has been proposed as an environmental barrier coating (EBC) material to protect silicon coated, silicon-based ceramic materials at high tempe…
Dual-Phase High-Entropy Ultra-High Temperature Ceramics
Mingde Qin, Joshua Gild, Chongze Hu +7
A series of dual-phase high-entropy ultrahigh temperature ceramics (DPHE-UHTCs) are fabricated starting from N binary borides and (5-N) binary carbides powders. >~99% relative dens…
Experimental Observation of High Intrinsic Thermal Conductivity of AlN
Zhe Cheng, Yee Rui Koh, Abdullah Mamun +17
AlN is an ultra-wide bandgap semiconductor which has been developed for applications including power electronics and optoelectronics. Thermal management of these applications is th…
Enhanced Figure of Merit in Bismuth-Antimony Fine-Grained Alloys at Cryogenic Temperatures
Sheng Gao, John Gaskins, Xixiao Hu +3
Thermoelectric (TE) materials research plays a vital role in heat-to-electrical energy conversion and refrigeration applications. Bismuth-antimony (Bi-Sb) alloy is a promising mate…
Titanium Contacts to MoS2 with Interfacial Oxide: Interface Chemistry and Thermal Transport
Keren M. Freedy, David H. Olson, Patrick E. Hopkins +1
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 photoel…
Thermal Conductance Across Harmonic-matched Epitaxial Al-sapphire Heterointerfaces
Zhe Cheng, Yee Rui Koh, Habib Ahmad +17
A unified understanding of interfacial thermal transport is missing due to the complicated nature of interfaces which involves complex factors such as interfacial bonding, interfac…
A High-Entropy Silicide: (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2
Joshua Gild, Jeffrey Braun, Kevin Kaufmann +5
A high-entropy metal disilicide, (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2, has been successfully synthesized. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and electron…
Titanium Contacts to Graphene: Process-Induced Variability in Electronic and Thermal Transport
Keren M. Freedy, Ashutosh Giri, Brian M. Foley +3
Contact Resistance (RC) is a major limiting factor in the performance of graphene devices. RC is sensitive to the quality of the interface and the composition of the contact, which…
Small-mass atomic defects enhance vibrational thermal transport at disordered interfaces with ultrahigh thermal boundary conductance
Ashutosh Giri, Sean W. King, William A. Lanford +11
The role of interfacial nonidealities and disorder on thermal transport across interfaces is traditionally assumed to add resistance to heat transfer, decreasing the thermal bounda…