489 citations · 3k across the 48 of their papers we have counts for
48 papers
Gate-tunable negative differential resistance in multifunctional van der Waals heterostructure
Richa Mitra, Konstantina Iordanidou, Naveen Shetty +7
Two-dimensional (2D) semiconductors have emerged as exciting candidates for the development of low-power and multifunctional computing applications, thanks to their qualities such…
Scaling of self-stimulated spin echoes
Sebastian de Graaf, Aditya Jayaraman, Sergey Kubatkin +2
Self-stimulated echoes have recently been reported in the high cooperativity and inhomogeneous coupling regime of spin ensembles with superconducting resonators. In this work, we s…
Bottom-up growth of monolayer honeycomb SiC
C. M. Polley, H. Fedderwitz, T. Balasubramanian +7
The long theorized two-dimensional allotrope of SiC has remained elusive amid the exploration of graphenelike honeycomb structured monolayers. It is anticipated to possess a large…
Quantum bath suppression in a superconducting circuit by immersion cooling
M. Lucas, A. V. Danilov, L. V. Levitin +7
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Yet, multiple experiments to-date have shown that most properties of supercondu…
Scalable fabrication of edge contacts to 2D materials
Naveen Shetty, Hans He, Richa Mitra +9
We present a fabrication method for reliably and reproducibly forming electrical contacts to 2D materials, based on the tri-layer resist system. We demonstrate the applicability of…
Highly efficient UV detection in a metal-semiconductor-metal detector with epigraphene
Hans He, Naveen Shetty, Sergey Kubatkin +7
We show that epitaxial graphene on silicon carbide (epigraphene) grown at high temperatures (T > 1850 °C) readily acts as material for implementing solar-blind ultraviolet (UV) det…
Reflection-enhanced gain in traveling-wave parametric amplifiers
S. Kern, P. Neilinger, E. Iľichev +12
The operating principle of traveling-wave parametric amplifiers is typically understood in terms of the standard coupled mode theory, which describes the evolution of forward propa…
Exceptionally accurate large graphene quantum Hall arrays for the new SI
Hans He, Karin Cedergren, Naveen Shetty +4
The quantum Hall effect (QHE) is a cornerstone in the new International System of Units (SI), wherein the base units are derived from seven fundamental constants such as Planck's c…
Pulsed Electron Spin Resonance of an Organic Microcrystal by Dispersive Readout
Ailsa Keyser, Jonathan Burnett, Sergey Kubatkin +4
We establish a testbed system for the development of high-sensitivity Electron Spin Resonance (ESR) techniques for small samples at cryogenic temperatures. Our system consists of a…
Electron-phonon coupling of epigraphene at millikelvin temperatures
Bayan Karimi, Hans He, Yu-Cheng Chang +7
We investigate the basic charge and heat transport properties of charge neutral epigraphene at sub-kelvin temperatures, demonstrating nearly logarithmic dependence of electrical co…
Fast tunable high Q-factor superconducting microwave resonators
S. Mahashabde, E. Otto, D. Montemurro +3
We present fast tunable superconducting microwave resonators fabricated from planar NbN on a sapphire substrate. The wavelength resonators are tuning fork shaped and tuned b…
Two-level systems in superconducting quantum devices due to trapped quasiparticles
S. E. de Graaf, L. Faoro, L. B. Ioffe +6
A major issue for the implementation of large scale superconducting quantum circuits is the interaction with interfacial two-level system defects (TLS) that leads to qubit relaxati…
Ambipolar charge transport in quasi-free-standing monolayer graphene on SiC obtained by gold intercalation
Kyung Ho Kim, Hans He, Claudia Struzzi +6
We present a study of quasi-free-standing monolayer graphene obtained by intercalation of Au atoms at the interface between the carbon buffer layer (Bu-L) and the silicon-terminate…
The performance limits of epigraphene Hall sensors
Hans He, Naveen Shetty, Thilo Bauch +5
Epitaxial graphene on silicon carbide, or epigraphene, provides an excellent platform for Hall sensing devices in terms of both high electrical quality and scalability. However, th…
Chemical sensing with atomically-thin metals templated by a two-dimensional insulator
Kyung Ho Kim, Hans He, Marius Rodner +8
Boosting the sensitivity of solid-state gas sensors by incorporating nanostructured materials as the active sensing element can be complicated by interfacial effects. Interfaces at…
Towards quantum-limited coherent detection of terahertz waves in charge-neutral graphene
S. Lara-Avila, A. Danilov, D. Golubev +7
Spectacular advances in heterodyne astronomy with both the Herschel Space Observatory and Stratospheric Observatory for Far Infrared Astronomy (SOFIA) have been largely due to brea…
Near-Field Scanning Microwave Microscopy in the Single Photon Regime
S. Geaney, D. Cox, T. Hönigl-Decrinis +5
The microwave properties of nano-scale structures are important in a wide variety of applications in quantum technology. Here we describe a low-power cryogenic near-field scanning…
Uniform doping of graphene close to the charge neutrality point by polymer-assisted spontaneous assembly of molecular dopants
Hans He, Kyung Ho Kim, Andrey Danilov +12
Tuning the charge carrier density of two-dimensional (2D) materials by incorporating dopants into the crystal lattice is a challenging task. An attractive alternative is the surfac…
Observation of Coulomb blockade in nanostructured epitaxial bilayer graphene on SiC
Cassandra Chua, Arseniy Lartsev, Jinggao Sui +9
We study electron transport in nanostructures patterned in bilayer graphene patches grown epitaxially on SiC as a function of doping, magnetic field, and temperature. Away from cha…
Direct identification of dilute surface spins on AlO: Origin of flux noise in quantum circuits
S. E. de Graaf, A. A. Adamyan, T. Lindström +4
It is universally accepted that noise and decoherence affecting the performance of superconducting quantum circuits are consistent with the presence of spurious two-level systems (…
Operation of graphene quantum Hall resistance standard in a cryogen-free table-top system
T. J. B. M. Janssen, S. Rozhko, I. Antonov +7
We demonstrate quantum Hall resistance measurements with metrological accuracy in a small cryogen-free system operating at a temperature of around 3.8K and magnetic fields below 5T…
Influence of impurity spin dynamics on quantum transport in epitaxial graphene
Samuel Lara-Avila, Sergey Kubatkin, Oleksiy Kashuba +6
Experimental evidence from both spin-valve and quantum transport measurements points towards unexpectedly fast spin relaxation in graphene. We report magnetotransport studies of ep…
Disorder induced Dirac-point physics in epitaxial graphene from temperature-dependent magneto-transport measurements
J. Huang, J. A. Alexander-Webber, A. M. R. Baker +8
We report a study of disorder effects on epitaxial graphene in the vicinity of the Dirac point by magneto-transport. Hall effect measurements show that the carrier density increase…
The effect of bilayer domains on electronic transport properties of epitaxial graphene on SiC
Tom Yager, Arseniy Lartsev, Rositza Yakimova +2
Magnetotransport measurements on Hall bar devices fabricated on purely monolayer epitaxial graphene on Silicon Carbide (SiC/G) show a very tight spread in carrier concentration and…