A5032827836- Graphene research and applications
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Advancements in Semiconductor Devices and Circuit Design
- Crystal Structures and Properties
- Nuclear Physics and Applications
- Thermography and Photoacoustic Techniques
- Advanced X-ray and CT Imaging
- Ultrasonics and Acoustic Wave Propagation
- Semiconductor materials and devices
- Physics of Superconductivity and Magnetism
- Supercapacitor Materials and Fabrication
- Iron-based superconductors research
- 2D Materials and Applications
- Advanced Memory and Neural Computing
- Advanced Physical and Chemical Molecular Interactions
- Chalcogenide Semiconductor Thin Films
- Boron and Carbon Nanomaterials Research
- Calibration and Measurement Techniques
- Optical and Acousto-Optic Technologies
University of California, Santa Barbara
2022-2025
Donostia International Physics Center
2021
In conventional superconductors, Cooper pairing occurs between electrons of opposite spin. We observe spin-polarized superconductivity in Bernal bilayer graphene when doped to a saddle-point van Hove singularity generated by large applied perpendicular electric field. cascade electrostatic gate-tuned transitions electronic phases distinguished their polarization within the isospin space defined combination spin and momentum-space valley degrees freedom. Although all these are metallic at...
Bernal bilayer graphene hosts even-denominator fractional quantum Hall states thought to be described by a Pfaffian wave function with non-Abelian quasiparticle excitations. Here, we report the quantitative determination of energy gaps in using both thermally activated transport and direct measurement chemical potential. We find activation gap 5.1 K at B=12 T for half filled N=1 Landau level, consistent density matrix renormalization group calculations state. However, measured thermodynamic...
One-dimensional conductors are described by Luttinger liquid theory, which predicts a power-law suppression of the single-electron tunneling density states at low voltages. The scaling exponent is predicted to be quantized when into single isolated chiral edge state fractional quantum Hall effect. We report conductance measurements across point contact linking integer and (at fillings 1 [Formula: see text], respectively). At weak coupling, we observe universal quadratic with temperature...
Quantum point contacts (QPCs) are an essential component in mesoscopic devices. Here, we study the transmission of quantum Hall edge modes through a gate-defined QPC monolayer graphene. We observe resonant tunneling peaks and nonlinear conductance pattern characteristic Coulomb-blockaded localized states. The in-plane electric polarizability reveals states at classically unstable electrostatic saddle point. explain this unexpected finding within self-consistent Thomas-Fermi model, that...
1. Isospin magnetism and spin-triplet superconductivity in Bernal bilayer graphene Authors: Haoxin Zhou, Yu Saito, Liam Cohen, William Huynh, Caitlin L. Patterson, Fangyuan Yang, Takashi Taniguchi, Kenji Watanabe, Andrea F. Young arXiv:2110.11317 2. Superconductivity rhombohedral trilayer Tian Xie, Nature 598, 434–438 […]
The subject of the propagation electrical waves along con- ductors is becoming great practical importance, problems this nature presenting themselves in nearly all branches elec- trical engineering.A discussion, therefore, any phase many wave which may arise practice will, I trust, be some interest.The discussion as they are usually treated text-books assumes a uniform conductor; this, however, rarely case.In we always have to deal with complex net-
Bernal bilayer graphene hosts even denominator fractional quantum Hall states thought to be described by a Pfaffian wave function with nonabelian quasiparticle excitations. Here we report the quantitative determination of energy gaps in using both thermally activated transport and direct measurement chemical potential. We find activation gap 5.1K at B = 12T for half-filled N=1 Landau level, consistent density matrix renormalization group calculations state. However, measured thermodynamic...