Yangchen He
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View article: Electrical Step‐Edge Contact to a Topological Superconductor Candidate 2M‐WS <sub>2</sub>
Electrical Step‐Edge Contact to a Topological Superconductor Candidate 2M‐WS <sub>2</sub> Open
A topological superconductor (TSC), characterized by a topologically nontrivial bulk state and protected gapless boundary states, is a promising platform for hosting Majorana bound states. However, many TSCs are environmentally sensitive, …
View article: Sliding multiferroicity in hexagonal stacked CrI3
Sliding multiferroicity in hexagonal stacked CrI3 Open
Developing new multiferroics at the two-dimensional (2D) limit with energy-efficient magnetoelectric coupling can inform the interplay physics of novel orders and advance on-chip high-performance computing applications. Here we apply stack…
View article: Probing interplay of topological properties and electron correlation in TaIrTe4 via nonlinear Hall effect
Probing interplay of topological properties and electron correlation in TaIrTe4 via nonlinear Hall effect Open
Studying the interplay of electron correlation and topology is crucial for discovering new quantum states, such as the fractional quantum spin Hall effect and topological superconductors. Unlike linear transport, nonlinear electrical respo…
View article: Twist-engineered phonon polaritons in α − V<sub>2</sub>O<sub>5</sub>
Twist-engineered phonon polaritons in α − V<sub>2</sub>O<sub>5</sub> Open
The advent of layered materials has unveiled new opportunities for tailoring electromagnetic waves at the subwavelength scale, particularly through the study of polaritons, a hybrid light–matter excitation. In this context, twist-optics, w…
View article: Evidence for Topological States and a Lifshitz Transition in Metastable 2<i>M</i>‐WSe<sub>2</sub>
Evidence for Topological States and a Lifshitz Transition in Metastable 2<i>M</i>‐WSe<sub>2</sub> Open
In recent years, T d transition metal dichalcogenides have been heavily explored for their type‐II Weyl topology, gate‐tunable superconductivity, and nontrivial edge states in the monolayer limit. Here, the Fermi surface characteristics an…
View article: Valley charge-transfer insulator in twisted double bilayer WSe2
Valley charge-transfer insulator in twisted double bilayer WSe2 Open
In flat-band systems, emergent physics can be substantially modified by the presence of another nearby electronic band. For example, a Mott˘Hubbard insulator can turn into a charge transfer insulator if other electronic states enter betwee…
View article: Two-Fold Anisotropic Superconductivity in Bilayer T$_d$-MoTe$_2$
Two-Fold Anisotropic Superconductivity in Bilayer T$_d$-MoTe$_2$ Open
Noncentrosymmetric 2D superconductors with large spin-orbit coupling offer an opportunity to explore superconducting behaviors far beyond the Pauli limit. One such superconductor, few-layer T$_d$-MoTe$_2$, has large upper critical fields t…
View article: Linear resistivity at van Hove singularities in twisted bilayer WSe <sub>2</sub>
Linear resistivity at van Hove singularities in twisted bilayer WSe <sub>2</sub> Open
Different mechanisms driving a linear temperature dependence of the resistivity ρ ∼ T at van Hove singularities (VHSs) or metal-insulator transitions when doping a Mott insulator are being debated intensively with competing theoretical pro…
View article: Observation of Multi-Phonon Emission in Monolayer WS2 on Various Substrates
Observation of Multi-Phonon Emission in Monolayer WS2 on Various Substrates Open
Transition metal dichalcogenides (TMDs) have unique absorption and emission properties that stem from their large excitonic binding energies, reduced-dielectric screening, and strong spin–orbit coupling. However, the role of substrates, ph…