5 papers
Interlayer exciton condensates between second Landau level orbitals in double bilayer graphene
Zeyu Hao, A. M. Zimmerman, Kenji Watanabe +2
We present Coulomb-drag measurements on a heterostructure comprising two Bernal-stacked bilayer graphene (BLG) sheets separated by a 2.5 nm hexagonal boron nitride (hBN) spacer in…
Forbidden second harmonics in centrosymmetric bilayer crystals
Haoning Tang, Zhitong Ding, Tianyi Ruan +7
Optical spectroscopy based on second-order nonlinearity is a critical technique for characterizing two-dimensional (2D) crystals as well as bioimaging and quantum optics. It is gen…
Modulation of superconductivity across a Lifshitz transition in alternating-angle twisted quadrilayer graphene
Isabelle Y. Phinney, Andrew Zimmerman, Zeyu Hao +5
We report electric field-controlled modulation of the Fermi surface topology and explore its effects on the superconducting state in alternating-angle twisted quadrilayer graphene…
Superfluid stiffness of twisted multilayer graphene superconductors
Abhishek Banerjee, Zeyu Hao, Mary Kreidel +12
The robustness of the macroscopic quantum nature of a superconductor can be characterized by the superfluid stiffness, , a quantity that describes the energy required to vary…
Intrinsic high-fidelity spin polarization of charged vacancies in hexagonal boron nitride
Wonjae Lee, Vincent S. Liu, Zhelun Zhang +11
The negatively charged boron vacancy () in hexagonal boron nitride (hBN) has garnered significant attention among defects in two-dimensional materials. T…