Scientists / Open questions

Pablo Jarillo-Herrero

Two-dimensional materials; moiré quantum matter

20 questions

Quantitative isolation of the Dirac-cone photogalvanic response in Bi2Se3-family topological insulators and its use as a probe of the surface Berry phase
Microscopic origin of spin-dependent and magnon-assisted tunneling in graphite/CrI3 van der Waals tunnel junctions, including the anomalously large field dispersion of the inelastic magnon peaks
Twist-angle disorder and the correlated phases of magic-angle twisted bilayer graphene: intrinsic tolerance versus percolation, the many-body consequences of gradient-induced internal in-plane electric fields, and interacting theory on the measured twist-angle landscape
Microscopic mechanism of electrostatic gate control of the metamagnetic transition and linear magnetoelectric response in bilayer CrI $_3$
Microscopic mechanism of valley-conserving tunnelling at metal contacts underlying the orbital and SU(4) Kondo effect in carbon nanotube quantum dots
Hot-carrier cooling length and cooling time in graphene: direct determination beyond the 2-micron lower bound and their dependence on carrier density, temperature, and excitation power
Microscopic nature of the half-filling correlated insulator in magic-angle twisted bilayer graphene
Microscopic origin of ultrastrong-coupled superconductivity in magic-angle twisted trilayer graphene: pairing mechanism, order-parameter symmetry, crystalline-symmetry role, and the displacement-field phase-boundary phenomenology left open by Park et al. (2021)
Microscopic mechanism, moiré-geometry control, and quantitative reconciliation of unconventional electronic ferroelectricity in BN-aligned bilayer graphene moiré heterostructures
Realizing deep-subwavelength ( $\sim\lambda/10^{2}$ ) polariton focusing and integrated mid-infrared nanopolaritonic circuits in hexagonal boron nitride
Microscopic origin of the anomalously large superlattice band-edge gaps and valley-protected Fermi-contour crossings in small-angle twisted bilayer graphene
Origin of the moiré-dependent electron–hole asymmetry of the Fermi velocity in graphene on hexagonal boron nitride
Practical transition-metal-dichalcogenide light sources and photodetectors for silicon photonic integrated circuits: waveguide coupling, speed, efficiency, electrically pumped lasing, and CMOS-compatible scaling
Moiré superlattice band-structure engineering of graphene on hexagonal boron nitride beyond the long-wavelength scalar-potential model: gaps versus Dirac replicas, higher-order superlattice vectors, and the short-wavelength ( $\lambda < 2$ nm) regime
Performance-limiting recombination and disorder mechanisms in electrically tunable p-n diodes based on monolayer WSe2
Microscopic theory of the cascade of flavour-symmetry-breaking transitions and Dirac revivals in magic-angle twisted bilayer graphene
Microscopic origin and quantitative characterization of the magnetic proximity effect at the Bi2Se3/EuS topological-insulator/ferromagnetic-insulator interface
Microscopic characterization of fractional Chern insulators in magic-angle twisted bilayer graphene: quasiparticle charge and statistics, exotic coprime states, isospin structure, zero-field limit, and competition with charge density wave phases
Realizing and topologically verifying the light-induced Floquet phase on the surface of a topological insulator: quantized Hall response, chiral edge states, and the route to Floquet Majorana modes
Quantitative design criteria and damping-channel decomposition for gate-tunable hyperbolic plasmon–phonon polaritons in graphene/hexagonal boron nitride van der Waals heterostructures

Back to open problems

Quantitative isolation of the Dirac-cone photogalvanic response in Bi2Se3-family topological insulators and its use as a probe of the surface Berry phase

Microscopic origin of spin-dependent and magnon-assisted tunneling in graphite/CrI3 van der Waals tunnel junctions, including the anomalously large field dispersion of the inelastic magnon peaks

Twist-angle disorder and the correlated phases of magic-angle twisted bilayer graphene: intrinsic tolerance versus percolation, the many-body consequences of gradient-induced internal in-plane electric fields, and interacting theory on the measured twist-angle landscape

Microscopic mechanism of electrostatic gate control of the metamagnetic transition and linear magnetoelectric response in bilayer CrI3_33​

Microscopic mechanism of valley-conserving tunnelling at metal contacts underlying the orbital and SU(4) Kondo effect in carbon nanotube quantum dots

Hot-carrier cooling length and cooling time in graphene: direct determination beyond the 2-micron lower bound and their dependence on carrier density, temperature, and excitation power

Microscopic nature of the half-filling correlated insulator in magic-angle twisted bilayer graphene

Microscopic origin of ultrastrong-coupled superconductivity in magic-angle twisted trilayer graphene: pairing mechanism, order-parameter symmetry, crystalline-symmetry role, and the displacement-field phase-boundary phenomenology left open by Park et al. (2021)

Microscopic mechanism, moiré-geometry control, and quantitative reconciliation of unconventional electronic ferroelectricity in BN-aligned bilayer graphene moiré heterostructures

Realizing deep-subwavelength (∼λ/102\sim\lambda/10^{2}∼λ/102) polariton focusing and integrated mid-infrared nanopolaritonic circuits in hexagonal boron nitride

Microscopic origin of the anomalously large superlattice band-edge gaps and valley-protected Fermi-contour crossings in small-angle twisted bilayer graphene

Origin of the moiré-dependent electron–hole asymmetry of the Fermi velocity in graphene on hexagonal boron nitride

Practical transition-metal-dichalcogenide light sources and photodetectors for silicon photonic integrated circuits: waveguide coupling, speed, efficiency, electrically pumped lasing, and CMOS-compatible scaling

Moiré superlattice band-structure engineering of graphene on hexagonal boron nitride beyond the long-wavelength scalar-potential model: gaps versus Dirac replicas, higher-order superlattice vectors, and the short-wavelength (λ<2\lambda < 2λ<2 nm) regime

Performance-limiting recombination and disorder mechanisms in electrically tunable p-n diodes based on monolayer WSe2

Microscopic theory of the cascade of flavour-symmetry-breaking transitions and Dirac revivals in magic-angle twisted bilayer graphene

Microscopic origin and quantitative characterization of the magnetic proximity effect at the Bi2Se3/EuS topological-insulator/ferromagnetic-insulator interface

Microscopic characterization of fractional Chern insulators in magic-angle twisted bilayer graphene: quasiparticle charge and statistics, exotic coprime states, isospin structure, zero-field limit, and competition with charge density wave phases

Realizing and topologically verifying the light-induced Floquet phase on the surface of a topological insulator: quantized Hall response, chiral edge states, and the route to Floquet Majorana modes

Quantitative design criteria and damping-channel decomposition for gate-tunable hyperbolic plasmon–phonon polaritons in graphene/hexagonal boron nitride van der Waals heterostructures

Microscopic mechanism of electrostatic gate control of the metamagnetic transition and linear magnetoelectric response in bilayer CrI $_3$

Realizing deep-subwavelength ( $\sim\lambda/10^{2}$ ) polariton focusing and integrated mid-infrared nanopolaritonic circuits in hexagonal boron nitride

Moiré superlattice band-structure engineering of graphene on hexagonal boron nitride beyond the long-wavelength scalar-potential model: gaps versus Dirac replicas, higher-order superlattice vectors, and the short-wavelength ( $\lambda < 2$ nm) regime