137 citations · 726 across the 24 of their papers we have counts for
25 papers
Low-Loss Superconducting Resonators Fabricated from Tantalum Films Grown at Room Temperature
Guillaume Marcaud, David Perello, Cliff Chen +16
The use of -tantalum in superconducting circuits has enabled a considerable improvement of the coherence time of transmon qubits. The standard approach to grow -tantalum thin…
Preserving phase coherence and linearity in cat qubits with exponential bit-flip suppression
Harald Putterman, Kyungjoo Noh, Rishi N. Patel +17
Cat qubits, a type of bosonic qubit encoded in a harmonic oscillator, can exhibit an exponential noise bias against bit-flip errors with increasing mean photon number. Here, we foc…
Hardware-efficient quantum error correction via concatenated bosonic qubits
Harald Putterman, Kyungjoo Noh, Connor T. Hann +118
In order to solve problems of practical importance, quantum computers will likely need to incorporate quantum error correction, where a logical qubit is redundantly encoded in many…
Low-energy electronic interactions in ferrimagnetic Sr2CrReO6 thin films
Guillaume Marcaud, Alex Taekyung Lee, Adam J. Hauser +14
We reveal in this study the fundamental low-energy landscape in the ferrimagnetic Sr2CrReO6 double perovskite and describe the underlying mechanisms responsible for the three low-e…
Chemical profiles of the oxides on tantalum in state of the art superconducting circuits
Russell A. McLellan, Aveek Dutta, Chenyu Zhou +23
Over the past decades, superconducting qubits have emerged as one of the leading hardware platforms for realizing a quantum processor. Consequently, researchers have made significa…
Role of Oxygen States in the Low Valence Nickelate LaNiO
Y. Shen, J. Sears, G. Fabbris +13
The discovery of superconductivity in square-planar low valence nickelates has ignited a vigorous debate regarding their essential electronic properties: Do these materials have ap…
High energy spin excitations in the quantum spin liquid candidate Zn-barlowite probed by resonant inelastic x-ray scattering
Rebecca W. Smaha, Jonathan Pelliciari, Ignace Jarrige +6
A quantum spin liquid is a novel ground state that can support long-range entanglement between magnetic moments, resulting in exotic spin excitations involving fractionalized $S=\f…
Local electronic structure of rutile RuO
Connor A. Occhialini, Valentina Bisogni, Hoydoo You +5
Recently, rutile RuO has raised interest for its itinerant antiferromagnetism, crystal Hall effect, and strain-induced superconductivity. Understanding and manipulating these p…
Tuning spin excitations in magnetic films by confinement
Jonathan Pelliciari, Sangjae Lee, Keith Gilmore +7
Spin excitations of magnetic thin films are the founding element for novel transport concepts in spintronics, magnonics, and magnetic devices in general. While spin dynamics have b…
Strong Superexchange in a Nickelate Revealed by Resonant Inelastic X-Ray Scattering
J. Q. Lin, P. Villar Arribi, G. Fabbris +20
The discovery of superconductivity in a nickelate has inspired disparate theoretical perspectives regarding the essential physics of this class of materials. A key issue…
Microscopic Relaxation Channels in Materials for Superconducting Qubits
Anjali Premkumar, Conan Weiland, Sooyeon Hwang +15
Despite mounting evidence that materials imperfections are a major obstacle to practical applications of superconducting qubits, connections between microscopic material properties…
Nature of the charge-density wave excitations in cuprates
J. Q. lin, H. Miao, D. G. Mazzone +14
The discovery of charge-density wave (CDW)-related effects in the resonant inelastic x-ray scattering (RIXS) spectra of cuprates holds the tantalizing promise of clarifying the int…
Enhanced electron-phonon coupling for charge-density-wave formation in LaEuSrCuO
Y. Y. Peng, A. A. Husain, M. Mitrano +8
Charge density wave (CDW) correlations are prevalent in all copper-oxide superconductors. While CDWs in conventional metals are driven by coupling between lattice vibrations and el…
Resonant inelastic x-ray scattering study of -RuCl: a progress report
Blair W Lebert, Subin Kim, Valentina Bisogni +3
Ru M-edge resonant inelastic x-ray scattering (RIXS) measurements of RuCl with 27 meV resolution reveals a spin-orbit exciton without noticeable splitting. We extract value…
Exploring itinerant states in divalent hexaborides using rare-earth edge resonant inelastic X-ray scattering
Donal Sheets, Vincent Flynn, Jungho Kim +10
We present a study of resonant inelastic X-ray scattering (RIXS) spectra collected at the rare-earth edges of divalent hexaborides YbB and EuB. In both systems, RIXS-ac…
Kondo-induced giant isotropic negative thermal expansion
D. G. Mazzone, M. Dzero, M. Abeykoon +9
Negative thermal expansion is an unusual phenomenon appearing in only a handful of materials, but pursuit and mastery of the phenomenon holds great promise for applications across…
Intrinsic resolving power of XUV diffraction gratings measured with Fizeau interferometry
Samuel Gleason, Jonathan Manton, Janet Sheung +6
We introduce a method for using Fizeau interferometry to measure the intrinsic resolving power of a diffraction grating. This method is more accurate than traditional techniques ba…
Resonant inelastic x-ray scattering study of entangled spin-orbital excitations in superconducting PrFeAsO0.7
T. Nomura, Y. Harada, H. Niwa +4
Low-energy electron excitation spectra were measured on a single crystal of a typical iron-based superconductor PrFeAsO using resonant inelastic X-ray scattering (RIXS) at…
Resonant inelastic x-ray scattering study of electronic excitations in insulating KFeSe
H. Gretarsson, T. Nomura, I. Jarrige +9
We report an Fe -edge resonant inelastic X-ray scattering (RIXS) study of KFeSe. This material is an insulator, unlike many parent compounds of iron-based…
Unified understanding of the valence transition in the rare-earth monochalcogenides under pressure
Ignace Jarrige, Hitoshi Yamaoka, Jean-Pascal Rueff +10
Valence instability is a key ingredient of the unusual properties of f electron materials, yet a clear understanding is lacking as it involves a complex interplay between f electro…
Disentangling a quantum antiferromagnet with resonant inelastic X-ray scattering
L. Andrew Wray, Ignace Jarrige, Kazuhiko Ikeuchi +11
Low-dimensional copper oxide lattices naturally manifest electronic states with strong short range quantum entanglement, which are known to lead to remarkable emergent material pro…
Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
H. Gretarsson, A. Lupascu, Jungho Kim +18
We report Fe K beta x-ray emission spectroscopy study of local magnetic moments in various iron based superconductors in their paramagnetic phases. Local magnetic moments are found…
Resonant inelastic x-ray scattering in single-crystal superconducting PrFeAsO0.7
I. Jarrige, K. Ishii, M. Yoshida +9
Resonant inelastic x-ray scattering (RIXS) spectra at the Fe K-edge were measured for a single crystal of the iron oxypnictide superconductor PrFeAsO0.7 (Tc=42 K). They disclose a…
Multiple pre-edge structures in Cu K-edge of high Tc cuprates revealed by high resolution x-ray absorption spectroscopy
C. Gougoussis, J. -P. Rueff, M. Calandra +7
Using high resolution x-ray absorption spectroscopy and state-of-the-art electronic structure calculations we demonstrate that the pre-edge region at the Cu K-edge of high T cu…