Nicole A. Benedek

Synthesis of epitaxial TaO2 thin films on Al2O3 by suboxide molecular-beam epitaxy and thermal laser epitaxy

Yorick A. Birkhölzer, Anna S. Park, Noah Schnitzer, Jeffrey Z. Kaaret et autres

Tantalum dioxide (TaO2) is a metastable tantalum compound. Here, we report the epitaxial stabilization of TaO2 on Al2O3 (11̄02) (r-plane sapphire) substrates using suboxide molecular-beam epitaxy and thermal laser epitaxy, demonstrating single-oriented, monodomain growth of anisotropically strained thin films. Microstructural investigation is …

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Unexpected Structural Complexity in Pseudo-Ruddlesden–Popper Phases

Tucker Jennings Swenson, Rachel K. Conway, Subhadip Mallick, Michael A. Hayward et autres

Layered perovskite oxides continue to be the subject of intense research efforts due to their highly tunable crystal structures, which often arise from the competition between various lattice, spin, charge and orbital degrees of freedom. In particular, a number of recent works …

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Reversible Superdense Ordering of Tetragonal Lithium in a Layered Material

Natalie Williams, Stephen D. Funni, Sihun Lee, Drake Niedzielski et autres

Understanding lithium (Li) ordering and dynamics is foundational in energy storage. X-ray based experimental methods do not simultaneously provide atomic structure information together with chemical composition and local bonding information for lithium in solids. Here we employ scanning transmission electron microscopy (STEM) …

Direct Mode‐Resolved Measurement of Interfacial Phonon Transport by Acoustic Phonon Reflectometry

C Hennighausen, Gustavo A. Alvarez, Jeffrey Z. Kaaret, Patrick Soucy et autres

ABSTRACT As nanoscale devices continue to shrink in size and increase in complexity, their thermal performance becomes increasingly governed by interfacial phenomena. In particular, thermal boundary resistance (TBR) plays a critical role in controlling heat dissipation. In the conventional phonon Landauer formalism, …

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Unexpected Structural Complexity in Pseudo-Ruddlesden-Popper Phases

Tucker Jennings Swenson, Rachel K. Conway, Subhadip Mallick, Michael A. Hayward et autres

Layered perovskite oxides continue to be the subject of intense research efforts due to their highly tunable crystal structures, which often arise from the competition between various lattice, spin, charge and orbital degrees of freedom. In particular, a number of recent works …

us, gb (code pays fourni par la source)

Synthesis of epitaxial TaO$_2$ thin films on Al$_2$O$_3$ by suboxide molecular-beam epitaxy and thermal laser epitaxy

Yorick A. Birkhölzer, Anna S. Park, Noah Schnitzer, Jeffrey Z. Kaaret et autres

Tantalum dioxide (TaO2) is a metastable tantalum compound. Here, we report the epitaxial stabilization of TaO2 on Al2O3 (1-102) (r-plane sapphire) substrates using suboxide molecular-beam epitaxy (MBE) and thermal laser epitaxy (TLE), demonstrating single-oriented, monodomain growth of anisotropically strained thin films. Microstructural …

Synthesis of epitaxial TaO$_2$ thin films on Al$_2$O$_3$ by suboxide molecular-beam epitaxy and thermal laser epitaxy

Yorick A. Birkhölzer, Anna S. Park, Noah Schnitzer, Jeffrey Z. Kaaret et autres

Tantalum dioxide (TaO2) is a metastable tantalum compound. Here, we report the epitaxial stabilization of TaO2 on Al2O3 (11 ̄02) (r-plane sapphire) substrates using suboxide molecular-beam epitaxy and thermal laser epitaxy, demonstrating single-oriented, monodomain growth of anisotropically strained thin films. Microstructural investigation …

Dataset: Synthesis of epitaxial TaO₂ thin films on Al₂O₃ by suboxide molecular-beam epitaxy and thermal laser epitaxy

Yorick A. Birkhölzer, Anna S. Park, Noah Schnitzer, Jeffrey Z. Kaaret et autres

Dataset contains, comprehensive Molecular-beam epitaxy (MBE) growth parameters i.e. substrate and source temperature of all the sources present in the chamber during growth as well as background pressure and rotation speed. Reflective High-energy electron diffraction (RHEED) videos and Images were recored before, …

Understanding long-lived metastable phases in ultrafast optical experiments

Sabrina J. Li, Guru Khalsa, Jeffrey Z. Kaaret, Nicole A. Benedek

Abstract Experiments involving resonant optical excitation of infrared-active phonons in crystals have emerged as a powerful new way to tune materials properties. A puzzling and so far unexplained aspect of some so-called nonlinear phononics experiments is that the observed lifetimes of the …

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Orbitally-Resolved Mechanical Properties of Solids from Maximally Localized Wannier Functions

Ethan T. Ritz, Guru Khalsa, Hsin-Yu Ko, Ju-an Zhang et autres

We present a technique for partitioning the total energy from a semi-local density functional theory calculation into contributions from individual electronic states in a localized Wannier basis. We use our technique to reveal the key role played by the $s$ and $p$ …

Picosecond Expansion in LaAlO 3 Resonantly Driven by Infrared-Active Phonons

Jakob Gollwitzer, Jeffrey Z. Kaaret, Y. Eren Suyolcu, Guru Khalsa et autres

We investigate the ultrafast structural dynamics of LaAlO_{3} thin films driven by short mid-infrared laser pulses at 20 THz. Time-resolved x-ray diffraction reveals an immediate lattice expansion and an acoustic breathing mode of the film. First-principles theory and a spring-mass model identify …

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Editorial: Symmetry-guided rational design and control of quantum matter with new functionality

Nicole A. Benedek, Milan Radovic, Berit Hansen Goodge, A. de la Torre

Quantum materials provide a vibrant playground to challenge our comprehension of complex emergent phenomena and a vital foundation for disruptive nextgeneration technologies. Ongoing advances in rational material design, synthesis approaches, ultrafast optical control, and experimental and theoretical characterization tools can be deployed …

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