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Interaction effects and superconductivity signatures in twisted double-bilayer WSe
Liheng An, Xiangbin Cai, Meizhen Huang +6
Twisted bilayer graphene provides a new two-dimensional platform for studying electron interaction phenomena and flat band properties such as correlated insulator transition, super…
Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
Niels B. M. Schröter, Ding Pei, Maia G. Vergniory +14
Topological semimetals in crystals with a chiral structure (which possess a handedness due to a lack of mirror and inversion symmetries) are expected to display numerous exotic phy…
Nontrivial Berry phase and type II Dirac transport in layered material PdTe2
Fucong Fei, Xiangyan Bo, Rui Wang +11
Here we report the evidence of the type II Dirac Fermion in the layered crystal PdTe2. The de Haas-van Alphen oscillations find a small Fermi pocket with a cross section of 0.077nm…
Weak Localization Effects as Evidence for Bulk Quantization in Thin Films Bi2Se3
Li Zhang, Merav Dolev, Qi I. Yang +5
Strong spin-orbit coupling in topological insulators results in the ubiquitously observed weak antilocalization feature in their magnetoresistance. Here we present magnetoresistanc…
Topological Insulator Nanowires and Nanoribbons
Desheng Kong, Jason C. Randel, Hailin Peng +7
Recent theoretical calculations and photoemission spectroscopy measurements on the bulk Bi2Se3 material show that it is a three-dimensional topological insulator possessing conduct…
Quantum Imaging of Topologically Unpaired Spin-Polarized Dirac Fermions
Kenjiro K. Gomes, Wonhee Ko, Warren Mar +3
The motion of a relativistic particle is linked to its spin by the Dirac equation. Remarkably, electrons in two-dimensional materials can mimic such Dirac particles but must always…