Showing 2021 · cond-mat.mtrl-sciShow all

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cond-mat.mtrl-sci2021★ 60 cited

Excited-state spin-resonance spectroscopy of V defect centers in hexagonal boron nitride

Nikhil Mathur, Arunabh Mukherjee, Xingyu Gao +5

The recently discovered spin-active boron vacancy (V) defect center in hexagonal boron nitride (hBN) has high contrast optically-detected magnetic resonance (ODMR) at…

cond-mat.mtrl-sci2021★ 12 cited

Disorder Dynamics in Battery Nanoparticles During Phase Transitions Revealed by Operando Single-Particle Diffraction

Jason Huang, Daniel Weinstock, Hayley Hirsh +9

Structural and ion-ordering phase transitions limit the viability of sodium-ion intercalation materials in grid scale battery storage by reducing their lifetime. However, the combi…

cond-mat.mtrl-sci2021★ 3 cited

Microscopic piezoelectric behavior of clamped and membrane (001) PMN-30PT thin films

A. Brewer, S. Lindemann, B. Wang +13

Bulk single-crystal relaxor-ferroelectrics, like Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT), are widely known for their large piezoelectricity. This is attributed to polarization rotation wh…

cond-mat.mtrl-sci2021★ 94 cited

Density of States Prediction for Materials Discovery via Contrastive Learning from Probabilistic Embeddings

Shufeng Kong, Francesco Ricci, Dan Guevarra +3

Machine learning for materials discovery has largely focused on predicting an individual scalar rather than multiple related properties, where spectral properties are an important…

cond-mat.mtrl-sci2021★ 10 cited

Separation of Artifacts from Spin-Torque Ferromagnetic Resonance Measurements of Spin-Orbit Torque for the Low-Symmetry van der Waals Semi-Metal ZrTe

Thow Min Cham, Saba Karimeddiny, Vishakha Gupta +2

We measure spin-orbit torque generated by exfoliated layers of the low-symmetry semi-metal ZrTe using the spin-torque ferromagnetic resonance (ST-FMR) technique. When the ZrTe$…

cond-mat.mtrl-sci2021★ 6 cited

A Strategy to Identify Materials Exhibiting a Large Nonlinear Phononics Response: Tuning the Ultrafast Structural Response of LaAlO with Pressure

Jeffrey Z. Kaaret, Guru Khalsa, Nicole A. Benedek

We use theory and first-principles calculations to investigate how structural changes induced by ultrafast optical excitation of infrared-active phonons change with hydrostatic pre…

cond-mat.mtrl-sci2021★ 11 cited

Atomic-scale studies of Fe3O4(001) and TiO2(110) surfaces following immersion in CO2-acidified water

Francesca Mirabella, Jan Balajka1, Jiri Pavelec +5

Difficulties associated with the integration of liquids into a UHV environment make surface-science style studies of mineral dissolution particularly challenging. Recently, we deve…

cond-mat.mtrl-sci2021★ 9 cited

Structure-selective operando x-ray spectroscopy

Daniel Weinstock, Hayley S. Hirsh, Oleg Yu. Gorobtsov +6

The relationship between charge and structure dictates the properties of electrochemical systems. For example, reversible Na-ion intercalation - a low-cost alternative to Li-ion te…

cond-mat.mtrl-sci2021★ 56 cited

On-the-fly Autonomous Control of Neutron Diffraction via Physics-Informed Bayesian Active Learning

Austin McDannald, Matthias Frontzek, Andrei T. Savici +8

Neutron scattering is a unique and versatile characterization technique for probing the magnetic structure and dynamics of materials. However, instruments at neutron scattering fac…

cond-mat.mtrl-sci2021★ 73 cited

Perspective: Towards the predictive discovery of ambipolarly dopable ultra-wide-band-gap semiconductors: the case of rutile GeO

S. Chae, K. A. Mengle, K. Bushick +8

Ultrawide-band-gap (UWBG) semiconductors are promising for fast, compact, and energy-efficient power-electronics devices. Their wider band gaps result in higher breakdown electric…

cond-mat.mtrl-sci2021★ 10 cited

Dislocation and Indium Droplet Related Emission Inhomogeneities in InGaN LEDs

Len van Deurzen, Mikel Gómez Ruiz, Kevin Lee +8

This report classifies emission inhomogeneities that manifest in InGaN quantum well blue light-emitting diodes grown by plasma-assisted molecular beam epitaxy on free-standing GaN…

cond-mat.mtrl-sci2021★ 39 cited

Unconventional hysteretic transition in a charge density wave

B. Q. Lv, Alfred Zong, D. Wu +25

Hysteresis underlies a large number of phase transitions in solids, giving rise to exotic metastable states that are otherwise inaccessible. Here, we report an unconventional hyste…

cond-mat.mtrl-sci2021★ 1 cited

Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin Films -- Evidence for Anisotropy in Exchange Stiffness

Ruofan Li, Peng Li, Di Yi +5

We report measurements of magnon spin transport in a spinel ferrite, magnesium aluminum ferrite (MAFO), which has a substantial in-plane four-fold…

cond-mat.mtrl-sci2021★ 4 cited

Ferroelectricity in Polar ScAlN/GaN Epitaxial Semiconductor Heterostructures

Joseph Casamento, Ved Gund, Hyunjea Lee +11

Room temperature ferroelectricity is observed in lattice-matched ~18% ScAlN/GaN heterostructures grown by molecular beam epitaxy on single-crystal GaN substrates. The epitaxial fil…

cond-mat.mtrl-sci2021

Deconvolution of phonon scattering by ferroelectric domain walls and point defects in a PbTiO3 thin film deposited in a composition-spread geometry

David Bugallo, Eric Langenberg, Elias Ferreiro-Vila +7

We present a detailed analysis of the temperature dependence of the thermal conductivity of a ferroelectric PbTiO3 thin film deposited in a composition-spread geometry enabling a c…

cond-mat.mtrl-sci2021★ 1 cited

Lack of Fusion in Additive Manufacturing: Defect or Asset?

Jenniffer Bustillos, Jinyeon Kim, Atieh Moridi

Rapid cooling rates and stochastic interactions between the heat source and feedstock in additive manufacturing (AM) result in strong anisotropy and process-induced defects deterio…

cond-mat.mtrl-sci2021★ 275 cited

Strongly correlated excitonic insulator in atomic double layers

Liguo Ma, Phuong X. Nguyen, Zefang Wang +6

Excitonic insulators (EI) arise from the formation of bound electron-hole pairs (excitons) in semiconductors and provide a solid-state platform for quantum many-boson physics. Stro…

cond-mat.mtrl-sci2021★ 3 cited

Understanding mechanisms of thermal expansion in PbTiO thin-films from first principles: role of high-order phonon-strain anharmonicity

Ethan T. Ritz, Nicole A. Benedek

The thermal properties of materials are critically important to various technologies and are increasingly the target of materials design efforts. However, it is only relatively rec…

cond-mat.mtrl-sci2021★ 18 cited

Momentum-resolved electronic band structure and offsets in an epitaxial NbN/GaN superconductor/semiconductor heterojunction

Tianlun Yu, John Wright, Guru Khalsa +9

The electronic structure of heterointerfaces play a pivotal role in their device functionality. Recently, highly crystalline ultrathin films of superconducting NbN have been integr…

cond-mat.mtrl-sci2021★ 21 cited

The Mesoscale Crystallinity of Nacreous Pearls

Jiseok Gim, Alden Koch, Laura M. Otter +5

A pearl's distinguished beauty and toughness are attributable to the periodic stacking of aragonite tablets known as nacre. Nacre has naturally occurring mesoscale periodicity that…

cond-mat.mtrl-sci2021★ 14 cited

Control of the metal-insulator transition in NdNiO thin films through the interplay between structural and electronic properties

Y. E. Suyolcu, K. Fürsich, M. Hepting +10

Heteroepitaxy offers a new type of control mechanism for the crystal structure, the electronic correlations, and thus the functional properties of transition-metal oxides. Here, we…

cond-mat.mtrl-sci2021★ 15 cited

Thermal conductivity of CaF at high pressure

Somayeh Faraji, S. Mehdi Vaez Allaei, Maximilian Amsler

We study the thermal transport properties of three CaF polymorphs up to a pressure of 30 GPa using first-principle calculations and an interatomic potential based on machine…

cond-mat.mtrl-sci2021★ 12 cited

Ultrafast Dynamics of Gallium Vacancy Charge States in -GaO

Arjan Singh, Okan Koksal, Nicholas Tanen +6

Point defects in crystalline materials often occur in multiple charge states. Although many experimental methods to study and explore point defects are available, techniques to exp…

cond-mat.mtrl-sci2021★ 22 cited

Interfacial Electron-Phonon Coupling Constants Extracted from Intrinsic Replica Bands in Monolayer FeSe/SrTiO

Brendan D. Faeth, Saien Xie, Shuolong Yang +10

The observation of replica bands by angle-resolved photoemission spectroscopy has ignited interest in the study of electron-phonon coupling at low carrier densities, particularly i…