3 papers
cond-mat.mtrl-sci2026
Weyl-Transition-Driven Giant Reversible Orbital Hall Conductivity
Bo Zhao, Hao Wang, Wei Ren +1
Orbital Hall conductivity (OHC) is a central ingredient of orbitronics, yet how to control it microscopically remains largely unexplored. Here we identify a general mechanism in wh…
cond-mat.mes-hall2026
Layer-polarized Transport via Gate-defined 1D and 0D PN Junctions in Double Bilayer Graphene
Wei Ren, Xi Zhang, Shiyu Guo +6
We fabricate twisted double bilayer graphene devices with zero twist angle and a set of local top and bottom gates aligned perpendicularly to each other. A 1D PN junction can be el…
cond-mat.mes-hall2026
Ferroelectric Quantum Point Contact in Twisted Transition Metal Dichalcogenides
Wei Ren, Shiyu Guo, Daochen Long +8
In twisted transition metal dichalcogenides (tTMDs), atomic reconstruction gives rise to moiré domains with alternating ferroelectric polarization, whose domain size and overall e…