137 citations · 1.7k across the 42 of their papers we have counts for
38 papers · 1 filter
Non-Reciprocal Supercurrents in a Field-Free Graphene Josephson Triode
John Chiles, Ethan G. Arnault, Chun-Chia Chen +6
Superconducting diodes are proposed non-reciprocal circuit elements that should exhibit non-dissipative transport in one direction while being resistive in the opposite direction.…
Loss and decoherence at the quantum Hall - superconductor interface
Lingfei Zhao, Zubair Iftikhar, Trevyn F. Q. Larson +5
We perform a systematic study of Andreev conversion at the interface between a superconductor and graphene in the quantum Hall (QH) regime. We find that the probability of Andreev…
Graphene-based quantum Hall interferometer with self-aligned side gates
Lingfei Zhao, Ethan G. Arnault, Trevyn F. Q. Larson +7
The vanishing band gap of graphene has long presented challenges for making high-quality quantum point contacts (QPCs) -- the partially transparent p-n interfaces introduced by con…
Dynamical Stabilization of Multiplet Supercurrents in Multi-terminal Josephson Junctions
Ethan G. Arnault, Sara Idris, Aeron McConnell +6
The dynamical properties of multi-terminal Josephson junctions have recently attracted interest, driven by the promise of new insights into synthetic topological phases of matter a…
One-Dimensional Edge Contact to Encapsulated MoS2 with a Superconductor
A. Seredinski, E. G. Arnault, V. Z. Costa +7
Establishing ohmic contact to van der Waals semiconductors such as MoS2 is crucial to unlocking their full potential in next-generation electronic devices. Encapsulation of few lay…
The Multi-terminal Inverse AC Josephson Effect
Ethan G. Arnault, Trevyn Larson, Andrew Seredinski +8
When a Josephson junction is exposed to microwave radiation, it undergoes the inverse AC Josephson effect - the phase of the junction locks to the drive frequency. As a result, the…
Zero-bias crossings and peculiar Shapiro maps in graphene Josephson junctions
T. F. Q. Larson, L. Zhao, E. G. Arnault +7
The AC Josephson effect manifests itself in the form of "Shapiro steps" of quantized voltage in Josephson junctions subject to RF radiation. This effect presents an early example o…
Interference of chiral Andreev edge states
Lingfei Zhao, Ethan G. Arnault, Alexey Bondarev +9
The search for topological excitations such as Majorana fermions has spurred interest in the boundaries between distinct quantum states. Here, we explore an interface between two p…
2-periodic magnetic interference in ballistic graphene Josephson junctions
C. T. Ke, A. W. Draelos, A. Seredinski +11
We investigate supercurrent interference patterns measured as a function of magnetic field in ballistic graphene Josephson junctions. At high doping, the expected -periodic…
Chiral Quasiparticle Tunneling Between Quantum Hall Edges in Proximity with a Superconductor
M. T. Wei, A. W. Draelos, A. Seredinski +10
We study a two-terminal graphene Josephson junction with contacts shaped to form a narrow constriction, less than 100nm in length. The contacts are made from type II superconductin…
Full control of quantum Hall supercurrent in a side gated graphene Josephson junction
Andrew Seredinski, Anne W. Draelos, Ethan G. Arnault +6
We present a study of a graphene-based Josephson junction with dedicated side gates carved from the same sheet of graphene as the junction itself. These side gates are highly effic…
Sub-Kelvin Lateral Thermal Transport in Diffusive Graphene
A. W. Draelos, A. Silverman, B. Eniwaye +7
In this work, we report on hot carrier diffusion in graphene across large enough length scales that the carriers are not thermalized across the crystal. The carriers are injected i…
Supercurrent Flow in Multi-Terminal Graphene Josephson Junctions
Anne W. Draelos, Ming-Tso Wei, Andrew Seredinski +7
We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in…
Supercurrent in Graphene Josephson Junctions with Narrow Trenches in the Quantum Hall Regime
Andrew Seredinski, Anne Draelos, Ming-Tso Wei +12
Coupling superconductors to quantum Hall edge states is the subject of intense investigation as part of the ongoing search for non-abelian excitations. Our group has previously obs…
Investigation of Supercurrent in the Quantum Hall Regime in Graphene Josephson Junctions
Anne W. Draelos, Ming Tso Wei, Andrew Seredinski +10
In this study, we examine multiple encapsulated graphene Josephson junctions to determine which mechanisms may be responsible for the supercurrent observed in the quantum Hall (QH)…
Ballistic graphene Josephson junctions from the short to the long regime
I. V. Borzenets, F. Amet, C. T. Ke +9
We investigate the critical current, , of ballistic Josephson junctions made of encapsulated graphene/boron-nitride heterostructures. We observe a crossover from the short to…
Critical current scaling in long diffusive graphene-based Josephson junctions
Chung-Ting Ke, Ivan V. Borzenets, Anne W. Draelos +8
We present transport measurements on long diffusive graphene-based Josephson junctions. Several junctions are made on a single-domain crystal of CVD graphene and feature the same c…
Rhodium Nanoparticles for Ultraviolet Plasmonics
Anne Watson, Xiao Zhang, Rodrigo Alcaraz de la Osa +6
The non-oxidizing catalytic noble metal rhodium is introduced for ultraviolet plasmonics. Planar tripods of 8 nm Rh nanoparticles, synthesized by a modified polyol reduction method…
Tunable Quantum Phase Transitions in a Resonant Level Coupled to Two Dissipative Baths
Dong E. Liu, Huaixiu Zheng, Gleb Finkelstein +1
We study tunneling through a resonant level connected to two dissipative bosonic baths: one is the resistive environment of the source and drain leads, while the second comes from…
Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures
I. V. Borzenets, U. C. Coskun, H. T. Mebrahtu +3
We examine the nature of the transitions between the normal and the superconducting branches of superconductor-graphene-superconductor Josephson junctions. We attribute the hystere…
Observation of Majorana Quantum Critical Behavior in a Resonant Level Coupled to a Dissipative Environment
H. T. Mebrahtu, I. V. Borzenets, H. Zheng +5
We investigate experimentally an exotic state of electronic matter obtained by fine-tuning to a quantum critical point (QCP), realized in a spin-polarized resonant level coupled to…
Non-equilibrium quantum transport through a dissipative resonant level
Chung-Hou Chung, Karyn Le Hur, Gleb Finkelstein +2
The resonant-level model represents a paradigmatic quantum system which serves as a basis for many other quantum impurity models. We provide a comprehensive analysis of the non-equ…
Quantum Phase Transition in a Resonant Level Coupled to Interacting Leads
Henok T. Mebrahtu, Ivan V. Borzenets, Dong E. Liu +5
An interacting one-dimensional electron system, the Luttinger liquid, is distinct from the "conventional" Fermi liquids formed by interacting electrons in two and three dimensions.…
Pb-graphene-Pb Josephson junctions: characterization in B field
I. V. Borzenets, U. C. Coskun, H. Mebrahtu +1
We fabricate superconductor-graphene-superconductor Josephson junctions with superconducting regions made of lead (Pb). The critical current through grapehene may be modulated by e…