Garnett W. Bryant
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View article: Magnon-induced electric polarization and magnon Nernst effects
Magnon-induced electric polarization and magnon Nernst effects Open
Magnons offer a promising path toward energy-efficient information transmission and the development of next-generation classical and quantum computing technologies. However, efficiently exciting, manipulating, and detecting magnons remains…
View article: Quantum geometric origins of the orbital degrees of freedom of hybrid bosonic quasiparticles in magnetic systems
Quantum geometric origins of the orbital degrees of freedom of hybrid bosonic quasiparticles in magnetic systems Open
The orbital degree of freedom has recently attracted significant attention due to the novel phenomena it enables in condensed matter systems. However, the interpretation of the orbital degree of freedom in bosonic quasiparticles remains co…
View article: GRANAD - Simulating GRAphene nanoflakes with ADatoms
GRANAD - Simulating GRAphene nanoflakes with ADatoms Open
View article: Probing Magnetic Properties of RuO$_{2}$ Heterostructures Through the Ferromagnetic Layer
Probing Magnetic Properties of RuO$_{2}$ Heterostructures Through the Ferromagnetic Layer Open
RuO$_{2}$ has been proposed as the prototypical altermagnetic material. However, several reports have recently questioned its intrinsic magnetic ordering, leading to conflicting findings, especially in thin film heterostructures pointing t…
View article: Tunable magnon band topology and magnon orbital Nernst effect in noncollinear antiferromagnets
Tunable magnon band topology and magnon orbital Nernst effect in noncollinear antiferromagnets Open
We theoretically investigate the intrinsic magnon orbital Nernst effect (ONE) in noncollinear antiferromagnets with Kagomé spin systems. Our analysis reveals that an externally applied magnetic field induces topological phase transitions i…
View article: Atomistic tight-binding Hartree-Fock calculations of multielectron configurations in P-doped silicon devices: wavefunction reshaping
Atomistic tight-binding Hartree-Fock calculations of multielectron configurations in P-doped silicon devices: wavefunction reshaping Open
Donor-based quantum devices in silicon are attractive platforms for universal quantum computing and analog quantum simulations. The nearly-atomic precision in dopant placement promises great control over the quantum properties of these dev…
View article: Symmetry-breaking induced surface magnetization in non-magnetic RuO$_2$
Symmetry-breaking induced surface magnetization in non-magnetic RuO$_2$ Open
Altermagnetism is a newly identified phase of magnetism distinct from ferromagnetism and antiferromagnetism. RuO$_2$ has been considered a prototypical metallic altermagnet with a critical temperature higher than room temperature. Previous…
View article: Data needs and challenges for quantum dot devices automation
Data needs and challenges for quantum dot devices automation Open
Gate-defined quantum dots are a promising candidate system for realizing scalable, coupled qubit systems and serving as a fundamental building block for quantum computers. However, present-day quantum dot devices suffer from imperfections …
View article: Challenges to extracting spatial information about double P dopants in Si from STM images
Challenges to extracting spatial information about double P dopants in Si from STM images Open
View article: Electric polarization induced by magnons and magnon Nernst effects
Electric polarization induced by magnons and magnon Nernst effects Open
Magnons offer a promising path toward energy-efficient information transmission and the development of next-generation classical and quantum computing technologies. However, methods to efficiently excite, manipulate, and detect magnons rem…
View article: Disorder-resilient transport through dopant arrays in silicon
Disorder-resilient transport through dopant arrays in silicon Open
Chains and arrays of phosphorus donors in silicon have recently been used to demonstrate dopant-based quantum simulators. The dopant disorder present in fabricated devices must be accounted for. Here, we theoretically study transport throu…
View article: Single-electron states of phosphorus-atom arrays in silicon
Single-electron states of phosphorus-atom arrays in silicon Open
We characterize the single-electron energies and the wavefunction structure of arrays with two, three, and four phosphorus atoms in silicon by implementing atomistic tight-binding calculations and analyzing wavefunction overlaps to identif…
View article: Nagaoka Ferromagnetism in $3 \times 3$ Arrays and Beyond
Nagaoka Ferromagnetism in $3 \times 3$ Arrays and Beyond Open
Nagaoka ferromagnetism (NF) is a long-predicted example of itinerant ferromagnetism (IF) in the Hubbard model that has been studied theoretically for many years. The condition for NF, an infinite on-site Coulomb repulsion and a single hole…
View article: Data needs and challenges for quantum dot devices automation
Data needs and challenges for quantum dot devices automation Open
Gate-defined quantum dots are a promising candidate system for realizing scalable, coupled qubit systems and serving as a fundamental building block for quantum computers. However, present-day quantum dot devices suffer from imperfections …
View article: Fermi-level pinning in ErAs nanoparticles embedded in III-V semiconductors
Fermi-level pinning in ErAs nanoparticles embedded in III-V semiconductors Open
Embedding rare-earth pnictide (RE-V) nanoparticles into III-V semiconductors enables unique optical, electrical, and thermal properties, with applications in THz photoconductive switches, tunnel junctions, and thermoelectric devices. Despi…
View article: Incorporation of random alloy GaBi$_{x}$As$_{1-x}$ barriers in InAs quantum dot molecules: alloy strain and orbital effects towards enhanced tunneling
Incorporation of random alloy GaBi$_{x}$As$_{1-x}$ barriers in InAs quantum dot molecules: alloy strain and orbital effects towards enhanced tunneling Open
Self-assembled InAs quantum dots (QDs), which have long hole-spin coherence times and are amenable to optical control schemes, have long been explored as building blocks for qubit architectures. One such design consists of vertically stack…
View article: Non-trivial topology in rare-earth monopnictides from dimensionality reduction
Non-trivial topology in rare-earth monopnictides from dimensionality reduction Open
Thin films of rare-earth monopnictide semimetals are expected to turn into semiconductors due to quantum confinement effect, which lifts the overlap between electron pockets at Brillouin zone edges and hole pockets at the zone center. Inst…
View article: Evaluating Alternative Glyph Design for Showing Large-Magnitude-Range Quantum Spins
Evaluating Alternative Glyph Design for Showing Large-Magnitude-Range Quantum Spins Open
We present experimental results to explore a form of bivariate glyphs for representing large-magnitude-range vectors. The glyphs meet two conditions: (1) two visual dimensions are separable; and (2) one of the two visual dimensions uses a …
View article: Experimental realization of an extended Fermi-Hubbard model using a 2D lattice of dopant-based quantum dots
Experimental realization of an extended Fermi-Hubbard model using a 2D lattice of dopant-based quantum dots Open
The Hubbard model is an essential tool for understanding many-body physics in condensed matter systems. Artificial lattices of dopants in silicon are a promising method for the analog quantum simulation of extended Fermi-Hubbard Hamiltonia…
View article: Scanning tunneling microscopy of buried dopants in silicon: images and their uncertainties
Scanning tunneling microscopy of buried dopants in silicon: images and their uncertainties Open
View article: Revising quantum optical phenomena in adatoms coupled to graphene nanoantennas
Revising quantum optical phenomena in adatoms coupled to graphene nanoantennas Open
Graphene flakes acting as photonic nanoantennas may sustain strong electromagnetic field localization and enhancement. To exploit the field enhancement, quantum emitters such as atoms or molecules should be positioned in such close proximi…
View article: Strong coupling between a topological insulator and a III-V heterostructure at terahertz frequency
Strong coupling between a topological insulator and a III-V heterostructure at terahertz frequency Open
We probe theoretically the emergence of strong coupling in a system consisting of a topological insulator (TI) and a III-V heterostructure using a numerical approach based on the scattering matrix formalism. Specifically, we investigate th…
View article: Bi2Se3 Growth on (001) GaAs Substrates for Terahertz Integrated Systems
Bi2Se3 Growth on (001) GaAs Substrates for Terahertz Integrated Systems Open
Terahertz (THz) technologies have been of interest for many years due to the variety of applications including gas sensing, nonionizing imaging of biological systems, security and defense, etc. To date, scientists have used different class…
View article: Atomically Precise Manufacturing for 2D-Designed Materials
Atomically Precise Manufacturing for 2D-Designed Materials Open
The primary purpose of this program was to develop atomically precise fabrication techniques for semiconductor systems that places dopant atoms in a single buried (100) atomic plane in silicon with near atomic precision to create unprecede…
View article: Light and microwave driven spin pumping across FeGaB–BiSb interface
Light and microwave driven spin pumping across FeGaB–BiSb interface Open
3-D topological insulators (TI) with large spin Hall conductivity have emerged as potential candidates for spintronic applications. Here, we report spin to charge conversion in bilayers of amorphous ferromagnet (FM) Fe_{78}Ga_{13}B_{9} (Fe…
View article: Modification of the optical properties of molecular chains upon coupling to adatoms
Modification of the optical properties of molecular chains upon coupling to adatoms Open
Adsorbed atoms (adatoms) coupled to the matrix of solid state host materials as impurities can significantly modify their properties. Especially in low-dimensional materials, such as one-dimensional organic polymer chains or quasi-one-dime…
View article: Quantum Simulation of an Extended Fermi-Hubbard Model Using a 2D Lattice of Dopant-based Quantum Dots
Quantum Simulation of an Extended Fermi-Hubbard Model Using a 2D Lattice of Dopant-based Quantum Dots Open
The Hubbard model is one of the primary models for understanding the essential many-body physics in condensed matter systems such as Mott insulators and cuprate high-Tc superconductors. Recent advances in atomically precise fabrication in …
View article: Single-Molecule Measurements Spatially Probe States Involved in Electron Transfer from CdSe/CdS Core/Shell Nanorods
Single-Molecule Measurements Spatially Probe States Involved in Electron Transfer from CdSe/CdS Core/Shell Nanorods Open
Semiconductor nanorods with charge-accepting molecules adsorbed on their surfaces serve as model systems for solar energy conversion. An electron photoexcited from the valence band of the nanorod to a high-energy state in the conduction ba…
View article: Tailorable Acceptor C 60 − n B n and Donor C 60 − m N m Pairs for Molecular Electronics
Tailorable Acceptor C 60 − n B n and Donor C 60 − m N m Pairs for Molecular Electronics Open
Our first-principles calculations demonstrate that C 60-n B n /C 60-m Nm molecules could be engineered acceptor/donor pair needed for molecular electronics by properly controlling the number n and m of the substitutional dopants in C 60 . …
View article: Many-body physics in small systems: Observing the onset and saturation of correlation in linear atomic chains
Many-body physics in small systems: Observing the onset and saturation of correlation in linear atomic chains Open
The exact study of small systems can guide us toward relevant measures for extracting information about many-body physics as we move to larger and more complex systems capable of quantum information processing or quantum analog simulation.…