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Coulomb Drag between a Carbon Nanotube and Monolayer Graphene
Laurel E. Anderson, Austin Cheng, Takashi Taniguchi +2
We have measured Coulomb drag between an individual single-walled carbon nanotube (SWNT) as a one-dimensional (1D) conductor and the two-dimensional (2D) conductor monolayer graphe…
Electronic Thermal Transport Measurement in Low-Dimensional Materials with Graphene Nonlocal Noise Thermometry
Jonah Waissman, Laurel E. Anderson, Artem V. Talanov +11
In low-dimensional systems, the combination of reduced dimensionality, strong interactions, and topology has led to a growing number of many-body quantum phenomena. Thermal transpo…
Van der Waals Heterostructure Magnetic Josephson Junction
H. Idzuchi, F. Pientka, K. -F. Huang +9
When two superconductors are connected across a ferromagnet, the spin configuration of the transferred Cooper pairs can be modulated due to magnetic exchange interaction. The resul…
Crossover between Strongly-coupled and Weakly-coupled Exciton Superfluids
Xiaomeng Liu, J. I. A. Li, Kenji Watanabe +5
In fermionic systems, superconductivity and superfluidity are enabled through the condensation of fermion pairs. The nature of this condensate can be tuned by varying the pairing s…
Electrically controlled emission from singlet and triplet exciton species in atomically thin light emitting diodes
Andrew Y. Joe, Luis A. Jauregui, Kateryna Pistunova +15
Excitons are composite bosons that can feature spin singlet and triplet states. In usual semiconductors, without an additional spin-flip mechanism, triplet excitons are extremely i…
Dual-gated graphene devices for near-field nano-imaging
Sai S. Sunku, Dorri Halbertal, Rebecca Engelke +11
Graphene-based heterostructures display a variety of phenomena that are strongly tunable by electrostatic local gates. Monolayer graphene (MLG) exhibits tunable surface plasmon pol…
Signatures of bilayer Wigner crystals in a transition metal dichalcogenide heterostructure
You Zhou, Jiho Sung, Elise Brutschea +12
A Wigner crystal, a regular electron lattice arising from strong correlation effects, is one of the earliest predicted collective electronic states. This many-body state exhibits q…
Andreev reflection in the fractional quantum Hall state
Önder Gül, Yuval Ronen, Si Young Lee +8
We construct high-quality graphene-based van der Waals devices with narrow superconducting niobium nitride (NbN) electrodes, in which superconductivity and robust fqH coexist. We f…
Aharonov Bohm Effect in Graphene Fabry Pérot Quantum Hall Interferometers
Yuval Ronen, Thomas Werkmeister, Danial Najafabadi +10
Quantum interferometers are powerful tools for probing the wave-nature and exchange statistics of indistinguishable particles. Of particular interest are interferometers formed by…
Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
Ko-Fan Huang, Yuval Ronen, Régis Mélin +4
In a Josephson junction (JJ), Cooper pairs are transported via Andreev bound states (ABSs) between superconductors. The ABSs in the weak link of multi-terminal (MT) JJs can coheren…
Nano-photocurrent mapping of local electronic structure in twisted bilayer graphene
Sai S. Sunku, Alexander S. McLeod, Tobias Stauber +10
We report a combined nano-photocurrent and infrared nanoscopy study of twisted bilayer graphene (TBG) enabling access to the local electronic phenomena at length scales as short as…
Imaging Andreev Reflection in Graphene
S. Bhandari, G. -H. Lee, K. Watanabe +3
Coherent charge transport along ballistic paths can be introduced into graphene by Andreev reflection, for which an electron reflects from a superconducting contact as a hole, whil…
Broken mirror symmetry in excitonic response of reconstructed domains in twisted MoSe/MoSe bilayers
Jiho Sung, You Zhou, Giovanni Scuri +15
Structural engineering of van der Waals heterostructures via stacking and twisting has recently been used to create moiré superlattices, enabling the realization of new optical and…
30-twisted bilayer graphene quasicrystals from chemical vapor deposition
Sergio Pezzini, Vaidotas Miseikis, Giulia Piccinini +8
The artificial stacking of atomically thin crystals suffers from intrinsic limitations in terms of control and reproducibility of the relative orientation of exfoliated flakes. Thi…
Imaging the Flow of Holes from a Collimating Contact in Graphene
Sagar Bhandari, Mary Kreidel, Alexander Kelser +5
A beam of holes formed in graphene by a collimating contact is imaged using a liquid-He cooled scanning probe microscope (SPM). The mean free path of holes is greater than the devi…
Electrically controlled emission from triplet charged excitons in atomically thin heterostructures
Andrew Y. Joe, Luis A. Jauregui, Kateryna Pistunova +15
Excitons are composite bosons that can feature spin singlet and triplet states. In usual semiconductors, without an additional spin-flip mechanism, triplet excitons are extremely i…
High resolution imaging of reconstructed domains and moire patterns in functional van der Waals heterostructure devices
Andrey Sushko, Kristiaan De Greve, Trond I. Andersen +8
The optical and electronic properties of van der Waals (vdW) heterostructures depend strongly on the atomic stacking order of the constituent layers. This is exemplified by periodi…
Moiré Excitons Correlated with Superlattice Structure in Twisted WSe/WSe Homobilayers
Trond I. Andersen, Giovanni Scuri, Andrey Sushko +11
Moiré superlattices in twisted van der Waals materials constitute a promising platform for engineering electronic and optical properties. However, a major obstacle to fully underst…
Guiding Dirac fermions in graphene with a carbon nanotube
Austin Cheng, Takashi Taniguchi, Kenji Watanabe +2
Relativistic massless charged particles in a two-dimensional conductor can be guided by a one-dimensional electrostatic potential, in an analogous manner to light guided by an opti…
Graphene-based Josephson junction microwave bolometer
Gil-Ho Lee, Dmitri K. Efetov, Woochan Jung +8
Sensitive microwave detectors are critical instruments in radioastronomy, dark matter axion searches, and superconducting quantum information science. The conventional strategy tow…
Imaging viscous flow of the Dirac fluid in graphene
Mark J. H. Ku, Tony X. Zhou, Qing Li +15
The electron-hole plasma in charge-neutral graphene is predicted to realize a quantum critical system whose transport features a universal hydrodynamic description, even at room te…
Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
Xiaomeng Liu, Zeyu Hao, Eslam Khalaf +5
Ferromagnetism and superconductivity typically compete with each other since the internal magnetic field generated in a magnet suppresses the formation of spin-singlet Cooper pairs…
Controlling excitons in an atomically thin membrane with a mirror
You Zhou, Giovanni Scuri, Jiho Sung +9
We demonstrate a new approach for dynamically manipulating the optical response of an atomically thin semiconductor, a monolayer of MoSe2, by suspending it over a metallic mirror.…
Electrical control of interlayer exciton dynamics in atomically thin heterostructures
Luis A. Jauregui, Andrew Y. Joe, Kateryna Pistunova +13
Excitons in semiconductors, bound pairs of excited electrons and holes, can form the basis for new classes of quantum optoelectronic devices. A van der Waals heterostructure built…