115 citations · 447 across the 9 of their papers we have counts for
9 papers
Electrostatically induced quantum point contact in bilayer graphene
Hiske Overweg, Hannah Eggimann, Xi Chen +10
We report the fabrication of electrostatically defined nanostructures in encapsulated bilayer graphene, with leakage resistances below depletion gates as high as G.…
Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN
Xi Chen, J. R. Wallbank, M. Mucha-Kruczynski +2
We investigate the magnetic minibands of a heterostructure consisting of bilayer graphene (BLG) and hexagonal boron nitride (hBN) by numerically diagonalizing a two-band Hamiltonia…
Hierarchy of gaps and magnetic minibands in graphene in the presence of the Abrikosov vortex lattice
Xi Chen, Vladimir I. Fal'ko
We determine the structure of band and gaps in graphene encapsulated in hexagonal boron nitride and subjected to magnetic field of Abrikosov lattice of vortices in the underlying s…
Moire superlattice effects in graphene/boron-nitride van der Waals heterostructures
J. R. Wallbank, M. Mucha-Kruczynski, Xi Chen +1
Van der Waals heterostructures of graphene and hexagonal boron nitride feature a moiré superlattice for graphene's Dirac electrons. Here, we review the effects generated by this su…
Topological p+ip superconductivity in doped graphene-like single-sheet materials BC
Xi Chen, Yugui Yao, Hong Yao +2
We theoretically study exotic superconducting phases in graphenelike single-sheet material BC doped to its type-II Van Hove singularity whose saddle point momenta are {\it not}…
Dirac edges of fractal magnetic minibands in graphene with hexagonal moire superlattices
Xi Chen, J. R. Wallbank, A. A. Patel +3
We find a systematic reappearance of massive Dirac features at the edges of consecutive minibands formed at magnetic fields B_{p/q}= pϕ_0/(qS) providing rational magnetic flux thro…
Double-periodic quasi-periodic graphene superlattice: non-Bragg band gap and electronic transport
Xi Chen, Pei-Liang Zhao, Qi-Biao Zhu
Electronic band gap and transport in quasi-periodic graphene superlattice of double-periodic sequence have been investigated. It is found that such quasi-periodic structure can pos…
Electronic band gap and transport in Fibonacci quasi-periodic graphene superlattice
Pei-Liang Zhao, Xi Chen
We investigate electronic band gap and transport in Fibonacci quasi-periodic graphene superlattice. It is found that such structure can possess a zero- gap which exists in…
Robust zero-averaged wave-number gap inside gapped graphene superlattices
Li-Gang Wang, Xi Chen
In this paper, the electronic band structures and its transport properties in the gapped graphene superlattices, with one-dimensional (1D) periodic potentials of square barriers, a…