Visualizing atomic-scale negative differential resistance in bilayer graphene.

  title={Visualizing atomic-scale negative differential resistance in bilayer graphene.},
  author={Keun Su Kim and Tae-Hwan Kim and Andrew Leigh Walter and Thomas Seyller and Han Woong Yeom and Eli Rotenberg and Aaron Bostwick},
  journal={Physical review letters},
  volume={110 3},
We investigate the atomic-scale tunneling characteristics of bilayer graphene on silicon carbide using the scanning tunneling microscopy. The high-resolution tunneling spectroscopy reveals an unexpected negative differential resistance (NDR) at the Dirac energy, which spatially varies within the single unit cell of bilayer graphene. The origin of NDR is explained by two near-gap van Hove singularities emerging in the electronic spectrum of bilayer graphene under a transverse electric field… 
Magnetic-field-controlled negative differential conductance in scanning tunneling spectroscopy of graphene npn junction resonators
Negative differential conductance (NDC), characterized by the decreasing current with increasing voltage, has attracted continuous attention for its various novel applications. The NDC typically
Suppression of Quasiparticle Scattering Signals in Bilayer Graphene Due to Layer Polarization and Destructive Interference.
This work studies chemically gated bilayer graphene using scanning tunneling microscopy and spectroscopy complemented by tight-binding calculations and presents a theory to describe the interference signal for a general n-band material.
Negative Differential Resistance and Spin-Filtering Effects in Zigzag Graphene Nanoribbons with Nitrogen-Vacancy Defects
We explore the electronic and transport properties of zigzag graphene nanoribbons (GNRs) with nitrogen-vacancy defects by performing fully self-consistent spin-polarized density functional theory
Visualization and Manipulation of Bilayer Graphene Quantum Dots with Broken Rotational Symmetry and Nontrivial Topology.
This study distinguishes BLG QDs from prior QD platforms with trivial band topology by using a numerical tight-binding model and determining that the observed broken rotational symmetry can be attributed to low energy anisotropic bands.
Negative differential resistance devices by using N-doped graphene nanoribbons.
This work investigates the transport properties of three molecules from conjugated molecule, one-dimension alkane chain, and single molecule magnet, which are sandwiched between two N-doped zigzag and armchair graphene nanoribbons (GNRs), and finds that the narrow density of states of N- doped GNRs and the bias-dependent effective coupling between the discrete frontier molecular orbitals and the subbands of Nollywood GNRs are responsible for the observed NDR phenomenon.
Negative differential resistance observed on the charge density wave of a transition metal dichalcogenide.
It is demonstrated that lattice defects can locally affect the coupling between the layers and are therefore a mechanism to realize NDR in these materials.
Spectroscopic characterization of Landau-level splitting and the intermediate v=0 phase in bilayer graphene
Despite various novel broken symmetry states have been revealed in bilayer graphene (BLG) experimentally, the atomic-scale spectroscopic investigation has been greatly limited. Here, we study
Nanoscale probing of broken-symmetry states in graphene induced by individual atomic impurities
Inherent symmetries of a system lead to multiple degeneracies of its energy spectra. Introducing individual atomic impurities can locally break these symmetries, which is expected to lift the
SymFET: A Proposed Symmetric Graphene Tunneling Field-Effect Transistor
In this paper, an analytical model for calculating the channel potential and current-voltage characteristics in a symmetric tunneling field-effect transistor (SymFET) is presented. The current in a
Photonic crystals for nano-light in moiré graphene superlattices
It is discovered that the atomic reconstruction occurring at small twist angles transforms the TBG into a natural plasmon photonic crystal for propagating nano-light, pointing to a pathway for controlling nano- light by exploiting quantum properties of graphene and other atomically layered van der Waals materials, eliminating the need for arduous top-down nanofabrication.


  • R. Rosenfeld
  • Medicine
    Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
  • 2009
I am writing with a simple plea to balance the voluminous articles about treatment in your journal with a modicum of information about nature and caring effects to rekindle the perception of physicians as healers, not only treaters, who relish the gifts of nature, and foster the humanistic aspect of medicine that has thrived for millennia.
疟原虫var基因转换速率变化导致抗原变异[英]/Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
Statistical packages have been used for decades to analyze large datasets or to perform mathematically intractable statistical methods. These packages are not capable of working with random variables
Science 313
  • 951–954
  • 2006
  • PRL
  • 2013
ACS Nano
  • ACS Nano
  • 2012
Nano Lett
  • Nano Lett
  • 2012
Nat. Nanotechnol
  • Nat. Nanotechnol
  • 2012
  • 2011
  • 2011