Matthew Yankowitz
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View article: Pervasive spin-triplet superconductivity in rhombohedral graphene
Pervasive spin-triplet superconductivity in rhombohedral graphene Open
Magnetic fields typically suppress superconductivity once the Zeeman energy exceeds the pairing gap, unless mechanisms such as unconventional pairing, strong spin-orbit coupling, or intrinsic magnetism intervene. Several graphene platforms…
View article: Sliding Disassembly of van der Waals Heterostructures
Sliding Disassembly of van der Waals Heterostructures Open
Many recent advances in our understanding of two-dimensional (2D) electron systems stem from van der Waals (vdW) heterostructures. The assembly process relies on the weak bonding across interfaces between layered vdW compounds, making it p…
View article: Observation of momentum dependent charge density wave gap in EuTe4
Observation of momentum dependent charge density wave gap in EuTe4 Open
The occurrence of charge density wave (CDW) phenomena, particularly in low dimensional rare-earth chalcogenides, has attracted substantial research interest. Among these materials, EuTe4, which features multiple Te layers and a single Eu-T…
View article: Superconductivity from dual-surface carriers in rhombohedral graphene
Superconductivity from dual-surface carriers in rhombohedral graphene Open
Intrinsic rhombohedral graphene hosts an unusual low-energy electronic wavefunction, predominantly localized at its outer crystal faces with negligible presence in the bulk. Increasing the number of graphene layers amplifies the density of…
View article: Observing the Birth of Rydberg Exciton Fermi Polarons on a Moire Fermi Sea
Observing the Birth of Rydberg Exciton Fermi Polarons on a Moire Fermi Sea Open
The optical spectra of two-dimensional (2D) semiconductors are dominated by tightly bound excitons and trions. In the low doping limit, trions are often described as three-body quasiparticles consisting of two electrons and one hole or vic…
View article: Giant elastoresistance in magic-angle twisted bilayer graphene
Giant elastoresistance in magic-angle twisted bilayer graphene Open
Strongly correlated and topological phases in moiré materials are exquisitely sensitive to lattice geometry at both atomic and superlattice length scales. Twist angle, pressure, and strain directly modify the lattice, and thus act as highl…
View article: The 2D Materials Roadmap
The 2D Materials Roadmap Open
Over the past two decades, 2D materials have rapidly evolved into a diverse and expanding family of material platforms. Many members of this materials class have demonstrated their potential to deliver transformative impact on fundamental …
View article: Low-lying Electronic Structure of Rare-Earth Based Topological Nodal Line Semimetal Candidate DySbTe
Low-lying Electronic Structure of Rare-Earth Based Topological Nodal Line Semimetal Candidate DySbTe Open
Lanthanide (Ln) based LnSbTe materials have garnered significant attention due to rich interplay of long range magnetic ordering and topological properties, driven by unique crystalline symmetry, 4f electron interactions, and pronounced sp…
View article: Chern Insulators at Integer and Fractional Filling in Moiré Pentalayer Graphene
Chern Insulators at Integer and Fractional Filling in Moiré Pentalayer Graphene Open
The advent of moiré platforms for engineered quantum matter has led to discoveries of integer and fractional quantum anomalous Hall effects, with predictions for correlation-driven topological states based on electron crystallization. Here…
View article: Topological flat bands in a family of multilayer graphene moiré lattices
Topological flat bands in a family of multilayer graphene moiré lattices Open
View article: Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles
Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles Open
Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid of interacting electrons and holes. Interactions profoundly affect the charge dynamics of graphene, which is encoded in the properties of its electron-photon col…
View article: On the origin of anomalous hysteresis in graphite/boron nitride transistors
On the origin of anomalous hysteresis in graphite/boron nitride transistors Open
Field-effect devices constructed by stacking flakes of van der Waals (vdW) materials, with hexagonal boron nitride (hBN) playing the role of gate dielectric, often exhibit virtually no hysteresis in their characteristics. This permits exqu…
View article: Interplay of electronic crystals with integer and fractional Chern insulators in moiré pentalayer graphene
Interplay of electronic crystals with integer and fractional Chern insulators in moiré pentalayer graphene Open
The rapid development of moiré quantum matter has recently led to the remarkable discovery of the fractional quantum anomalous Hall effect, and sparked predictions of other novel correlation-driven topological states. Here, we investigate …
View article: Strongly interacting Hofstadter states in magic-angle twisted bilayer graphene
Strongly interacting Hofstadter states in magic-angle twisted bilayer graphene Open
Magic-angle twisted bilayer graphene (MATBG) hosts a multitude of strongly correlated states at partial fillings of its flat bands. In a magnetic field, these flat bands further evolve into a unique Hofstadter spectrum renormalized by stro…
View article: Topological electronic crystals in twisted bilayer-trilayer graphene
Topological electronic crystals in twisted bilayer-trilayer graphene Open
In a dilute two-dimensional electron gas, Coulomb interactions can stabilize the formation of a Wigner crystal. Although Wigner crystals are topologically trivial, it has been predicted that electrons in a partially-filled band can break c…
View article: Visualizing the microscopic origins of topology in twisted molybdenum ditelluride
Visualizing the microscopic origins of topology in twisted molybdenum ditelluride Open
In moiré materials with flat electronic bands and suitable quantum geometry, strong correlations can give rise to novel topological states of matter. The nontrivial band topology of twisted molybdenum ditelluride (tMoTe$_2$) -- responsible…
View article: Continuously tunable uniaxial strain control of van der Waals heterostructure devices
Continuously tunable uniaxial strain control of van der Waals heterostructure devices Open
Uniaxial strain has been widely used as a powerful tool for investigating and controlling the properties of quantum materials. However, existing strain techniques have so far mostly been limited to use with bulk crystals. Although recent p…
View article: Topological flat bands in a family of multilayer graphene moiré lattices
Topological flat bands in a family of multilayer graphene moiré lattices Open
Moiré materials host a wealth of intertwined correlated and topological states of matter, all arising from flat electronic bands with nontrivial quantum geometry. A prominent example is the family of alternating-twist magic-angle graphene …
View article: Measuring and Manipulating Density of States in Two-Dimensional Materials with Electrochemical Capacitance
Measuring and Manipulating Density of States in Two-Dimensional Materials with Electrochemical Capacitance Open
Measuring and controlling the density of states (DOS) and defect states of two-dimensional van der Waals materials is of profound importance for understanding their unique physical properties, and for advancing their future practical appli…
View article: Dynamically tunable moiré exciton Rydberg states in a monolayer semiconductor on twisted bilayer graphene
Dynamically tunable moiré exciton Rydberg states in a monolayer semiconductor on twisted bilayer graphene Open
View article: Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles
Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles Open
Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid of interacting electrons and holes. Interactions profoundly affect the charge dynamics of graphene, which is encoded in the properties of its electron-photon col…
View article: The Curious Case of the Gate that Doesn’t Work
The Curious Case of the Gate that Doesn’t Work Open
View article: Graphene-based analog of single-slit electron diffraction
Graphene-based analog of single-slit electron diffraction Open
This work reports the experimental demonstration of single-slit diffraction exhibited by electrons propagating in encapsulated graphene with an effective de Broglie wavelength corresponding to their attributes as massless Dirac fermions. N…
View article: Dynamically tunable moiré Rydberg excitons in a monolayer semiconductor on twisted bilayer graphene
Dynamically tunable moiré Rydberg excitons in a monolayer semiconductor on twisted bilayer graphene Open
Moiré excitons are emergent optical excitations in 2D semiconductors with deep moiré superlattice potentials. While these excitations have been realized in several platforms, a system with dynamically tunable moiré potential to tailor the …
View article: High-pressure studies of atomically thin van der Waals materials
High-pressure studies of atomically thin van der Waals materials Open
Two-dimensional (2D) materials and their moiré superlattices represent a new frontier for quantum matter research due to the emergent properties associated with their reduced dimensionality and extreme tunability. The properties of these a…
View article: Mixed-dimensional moiré systems of graphitic thin films with a twisted interface
Mixed-dimensional moiré systems of graphitic thin films with a twisted interface Open
Moiré patterns formed by stacking atomically-thin van der Waals crystals with a relative twist angle can give rise to dramatic new physical properties. The study of moiré materials has so far been limited to structures comprising no more t…
View article: Gate-Tunable Proximity Effects in Graphene on Layered Magnetic Insulators
Gate-Tunable Proximity Effects in Graphene on Layered Magnetic Insulators Open
The extreme versatility of two-dimensional van der Waals (vdW) materials derives from their ability to exhibit new electronic properties when assembled in proximity with dissimilar crystals. For example, although graphene is inherently non…
View article: Moiré coupling and other emergent phenomena in stacked van der Waals materials
Moiré coupling and other emergent phenomena in stacked van der Waals materials Open
First Page
View article: Anomalous Hall effect at half filling in twisted bilayer graphene
Anomalous Hall effect at half filling in twisted bilayer graphene Open
Magic-angle twisted bilayer graphene (tBLG) has been studied extensively owing to its wealth of symmetry-broken phases, correlated Chern insulators, orbital magnetism, and superconductivity. In particular, the anomalous Hall effect (AHE) h…
View article: Unraveling Strain Gradient Induced Electromechanical Coupling in Twisted Double Bilayer Graphene Moiré Superlattices
Unraveling Strain Gradient Induced Electromechanical Coupling in Twisted Double Bilayer Graphene Moiré Superlattices Open
Moiré superlattices of 2D materials with a small twist angle are thought to exhibit appreciable flexoelectric effect, though unambiguous confirmation of their flexoelectricity is challenging due to artifacts associated with commonly used p…