Michael E. Flatté
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View article: A General and Modular Approach to Solid-State Integration of Zero-Dimensional Quantum Systems
A General and Modular Approach to Solid-State Integration of Zero-Dimensional Quantum Systems Open
Here, we present an all-electrical readout mechanism for quasi-0D quantum states (0D-QS), such as point defects, adatoms, and molecules, that is modular and general, providing an approach that is amenable to scaling and integration with ot…
View article: Calculations of current in the cotunneling regime using Lindblad equations
Calculations of current in the cotunneling regime using Lindblad equations Open
Transport through zero-dimensional states in a tunneling barrier can occur via co-tunneling, wherein a carrier occupying a state outside the range of energies between the chemical potentials of the two leads hops to a lead, and within the …
View article: Imaging the Acceptor Wave Function Anisotropy in Silicon
Imaging the Acceptor Wave Function Anisotropy in Silicon Open
We present the first scanning tunneling microscopy (STM) image of hydrogenic acceptor wave functions in silicon. These acceptor states appear as square-ring-like features in STM images and originate from near-surface defects introduced by …
View article: Spin-State-Selective Excitation in Spin Defects of Hexagonal Boron Nitride
Spin-State-Selective Excitation in Spin Defects of Hexagonal Boron Nitride Open
Hexagonal boron nitride (hBN) has emerged as a promising two-dimensional platform for quantum sensing due to its optically addressable spin defects, such as the negatively charged boron vacancy (VB-). Spectral overlap of spin transitions d…
View article: Suppression of charge-density wave and superconductivity in a lithiated NbSe$_2$ monolayer
Suppression of charge-density wave and superconductivity in a lithiated NbSe$_2$ monolayer Open
We present an \textit{ab initio} investigation of the long-range charge density wave (CDW) order and superconducting properties of the pristine and lithiated NbSe$_2$ monolayer. Stable CDW structures are obtained through atomic reconstruct…
View article: Microscopic Scattering Approach to In-Gap States: Cr Adatoms on Superconducting β-Bi2Pd
Microscopic Scattering Approach to In-Gap States: Cr Adatoms on Superconducting β-Bi2Pd Open
We develop a microscopic scattering formalism to describe Yu-Shiba-Rusinov (YSR) states due to a single Cr adatom on the Bi-terminated surface of $β-Bi_2Pd$, by combining ab initio Wannier functions with a real-space Green's function appro…
View article: Roadmap on atomically-engineered quantum platforms
Roadmap on atomically-engineered quantum platforms Open
Matter at the atomic-scale is inherently governed by the laws of quantum mechanics. This makes charges and spins confined to individual atoms—and interactions among them—an invaluable resource for fundamental research and quantum technolog…
View article: Enhancement of microwave to optical spin-based quantum transduction via a magnon mode
Enhancement of microwave to optical spin-based quantum transduction via a magnon mode Open
We propose a method for converting single microwave photons to single optical sideband photons based on spinful impurities in magnetic materials. This hybrid system is advantageous over previous proposals because (i) the implementation all…
View article: Engineering spin coherence in core-shell diamond nanocrystals
Engineering spin coherence in core-shell diamond nanocrystals Open
Fluorescent diamond nanocrystals can host spin qubit sensors capable of probing the physical properties of biological systems with nanoscale spatial resolution. Sub-100 nm diamond nanosensors can readily be delivered into intact cells and …
View article: Imaging the Acceptor Wave Function Anisotropy in Silicon
Imaging the Acceptor Wave Function Anisotropy in Silicon Open
We present the first scanning tunneling microscopy (STM) images of hydrogenic acceptor wave functions in silicon. These acceptor states appear as square ring-like features in STM images and originate from near-surface defects introduced by…
View article: Engineering diamond interfaces free of dark spins
Engineering diamond interfaces free of dark spins Open
Nitrogen-vacancy (NV) centers in diamond are extensively utilized as quantum sensors for imaging fields at the nanoscale. The ultra-high sensitivity of NV magnetometers has enabled the detection and spectroscopy of individual electron spin…
View article: Functionalized Cr$_2$C MXenes: Novel Magnetic Semiconductors
Functionalized Cr$_2$C MXenes: Novel Magnetic Semiconductors Open
We report an \textit{ab initio} investigation of functionalized and 3$d$-electrons doped Cr$_2$C MXenes. Upon functionalization, the Cr$_2$C becomes chemically, dynamically, and mechanically stable, and it exhibits magnetic semiconducting …
View article: Ab initio calculations of erbium crystal field splittings in oxide hosts: role of the 4f radial wave function
Ab initio calculations of erbium crystal field splittings in oxide hosts: role of the 4f radial wave function Open
We expand here our description of a newly developed simple and effective ab initio method of calculating crystal field coefficients (CFCs) of rare-earth atoms in insulating hosts, focusing on Er in wide band gap oxide hosts MgO, ZnO, TiO$_…
View article: Ab initio calculations of erbium crystal field splittings in oxide hosts
Ab initio calculations of erbium crystal field splittings in oxide hosts Open
We present an effective ab initio method to calculate the crystal field coefficients of an erbium (Er3+) ion experiencing different local site symmetries in several wide-band-gap oxides, and then evaluate crystal field splittings of these …
View article: Robust Edge States from Band Topology in a Damped One-dimensional Magnonic Crystal
Robust Edge States from Band Topology in a Damped One-dimensional Magnonic Crystal Open
The presence or absence of topologically-produced edge states of a crystal are robust to disorder; their stability in the presence of decay is less clear. For topologically nontrivial bosonic systems with finite particle lifetimes, such as…
View article: Theory of spin center sensing of diffusion and other surface electric dynamics
Theory of spin center sensing of diffusion and other surface electric dynamics Open
Surface electric dynamics influences the quantum coherence of near-surface spin centers (i.e., T1 and T2 times) through spatial and temporal fluctuations of the surface charge density and the electrostatic potential at the crystal surface …
View article: Interplay between charge and spin noise in the near-surface theory of decoherence and relaxation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>C</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mi>v</mml:mi></mml:mrow></mml:msub></mml:math> symmetry qutrit spin-1 centers
Interplay between charge and spin noise in the near-surface theory of decoherence and relaxation of symmetry qutrit spin-1 centers Open
Decoherence and relaxation of solid-state defect qutrits near a crystal surface, where they are commonly used as quantum sensors, originate from charge and magnetic field noise. A complete theory requires a formalism for decoherence and re…
View article: A general and modular approach to solid-state integration and readout of zero-dimensional quantum systems
A general and modular approach to solid-state integration and readout of zero-dimensional quantum systems Open
Here, we present an all-electrical readout mechanism for quasi-0D quantum states (0D-QS) such as point defects, adatoms and molecules, that is modular and general, providing an approach that is amenable to scaling and integration with othe…
View article: Room Temperature Dynamics of an Optically Addressable Single Spin in Hexagonal Boron Nitride
Room Temperature Dynamics of an Optically Addressable Single Spin in Hexagonal Boron Nitride Open
Hexagonal boron nitride (h-BN) hosts pure single-photon emitters that have shown evidence of optically detected electronic spin dynamics. However, the electrical and chemical structures of these optically addressable spins are unknown, and…
View article: Fine structure splitting cancellation in highly asymmetric InAs/InP droplet epitaxy quantum dots
Fine structure splitting cancellation in highly asymmetric InAs/InP droplet epitaxy quantum dots Open
We find the fine structure splitting (FSS) of a single exciton, which splits its degenerate ground-state manifold into singlets, nearly vanishes in highly asymmetric quantum dots (QDs) due to the cancellation of splitting effects with mark…
View article: <i>In situ</i> electric-field control of ferromagnetic resonance in the low-loss organic-based ferrimagnet V[TCNE]<i>x</i>∼2
<i>In situ</i> electric-field control of ferromagnetic resonance in the low-loss organic-based ferrimagnet V[TCNE]<i>x</i>∼2 Open
We demonstrate indirect electric-field control of ferromagnetic resonance (FMR) in devices that integrate the low-loss, molecule-based, room-temperature ferrimagnet vanadium tetracyanoethylene (V[TCNE]x∼2) mechanically coupled to PMN-PT pi…
View article: Tunable zero-field magnetoresistance responses in Si transistors: Origins and applications
Tunable zero-field magnetoresistance responses in Si transistors: Origins and applications Open
The near-zero-field magnetoresistance (NZFMR) response has proven to be a useful tool for studying atomic-scale, paramagnetic defects that are relevant to the reliability of semiconductor devices. The measurement is simple to make and, in …
View article: Challenges in advancing our understanding of atomic-like quantum systems: Theory and experiment
Challenges in advancing our understanding of atomic-like quantum systems: Theory and experiment Open
Quantum information processing and quantum sensing is a central topic for researchers who are part of the Materials Research Society and the Quantum Staging Group is providing leadership and guidance in this context. We convened a workshop…
View article: Strong Photon‐Magnon Coupling Using a Lithographically Defined Organic Ferrimagnet
Strong Photon‐Magnon Coupling Using a Lithographically Defined Organic Ferrimagnet Open
A cavity‐magnonic system composed of a superconducting microwave resonator coupled to a magnon mode hosted by the organic‐based ferrimagnet vanadium tetracyanoethylene (V[TCNE] x ) is demonstrated. This work is motivated by the challenge o…
View article: Magnon-mediated qubit coupling determined via dissipation measurements
Magnon-mediated qubit coupling determined via dissipation measurements Open
Controlled interaction between localized and delocalized solid-state spin systems offers a compelling platform for on-chip quantum information processing with quantum spintronics. Hybrid quantum systems (HQSs) of localized nitrogen-vacancy…
View article: Spin-Dependent Capture Mechanism for Magnetic Field Effects on Interface Recombination Current in Semiconductor Devices
Spin-Dependent Capture Mechanism for Magnetic Field Effects on Interface Recombination Current in Semiconductor Devices Open
Electrically detected magnetic resonance (EDMR) and near-zero field magnetoresistance (NZFMR) are techniques that probe defect states at dielectric interfaces critical for metal-oxide-semiconductor (MOS) electronic devices such as the Si/S…
View article: Spin Hall conductivity in Bi$_{1-x}$Sb$_x$ as an experimental test of bulk-boundary correspondence
Spin Hall conductivity in Bi$_{1-x}$Sb$_x$ as an experimental test of bulk-boundary correspondence Open
Bulk-boundary correspondence is a foundational principle underlying the electronic band structure and physical behavior of topological quantum materials. Although it has been rigorously tested in topological systems where the physical prop…
View article: Magnon-mediated qubit coupling determined via dissipation measurements
Magnon-mediated qubit coupling determined via dissipation measurements Open
Accompanying data for the main text and supporting information of Magnon-mediated qubit coupling determined via dissipation measurementsPaper abstract is as follows:Controlled interaction between localized and delocalized solid-state spin …