199 citations · 648 across the 17 of their papers we have counts for
9 papers · 1 filter
Energy-gap Opening and Quenching in Graphene under Periodic External Potentials
Aihua Zhang, Zhenxiang Dai, Lei Shi +2
In this paper, we investigated the effects of periodic external potentials on properties of charge carriers in graphene using both the first-principles method based on density func…
Massless Dirac Fermions in Graphene under an External Periodic Magnetic Field
Shuanglong Liu, Argo Nurbawono, Na Guo +1
By solving two-component spinor equation for massless Dirac Fermions, we show that graphene under a periodic external magnetic field exhibits a unique energy spectrum: At low energ…
Reversible magnetism switching in graphene-based systems via the decoration of photochromic molecules
Argo Nurbawono, Chun Zhang
By first principles calculations, we demonstrate that when decorated with photochromic molecules, it is possible to use light to reversibly control the magnetic properties of a nan…
Electronic and Transport Properties of Molecular Junctions under a Finite Bias: A Dual Mean Field Approach
Shuanglong Liu, Yuan Ping Feng, Chun Zhang
We show that when a molecular junction is under an external bias, its properties can not be uniquely determined by the total electron density in the same manner as the density func…
Electrical transport across metal/two-dimensional carbon junctions: Edge versus side contacts
Yihong Wu, Ying Wang, Jiayi Wang +6
Metal/two-dimensional carbon junctions are characterized by using a nanoprobe in an ultrahigh vacuum environment. Significant differences were found in bias voltage (V) dependence…
Switching and Rectification of a Single Light-sensitive Diarylethene Molecule Sandwiched between Graphene Nanoribbons
Yongqing Cai, Aihua Zhang, Yuan Ping Feng +1
The 'open' and 'closed' isomers of the diarylethene molecule that can be converted between each other upon photo-excitation are found to have drastically different current-voltage…
Adsorbate and defect effects on electronic and transport properties of gold nanotubes
Yongqing Cai, Miao Zhou, Minggang Zeng +2
First-principles calculations have been performed to study the effects of adsorbates (CO molecules and O atoms) and defects on electronic structures and transport properties of Au…
Bandgap engineering of zigzag graphene nanoribbons by manipulating edge states via defective boundaries
Aihua Zhang, Yihong Wu, San-Huang Ke +2
One of severe limits of graphene nanoribbons (GNRs) in future applications is that zigzag GNRs (ZGNRs) are gapless, so cannot be used in field effect transistors (FETs). In this pa…
Two-dimensional Graphene Superlattice Made with Partial Hydrogenation
Ming Yang, Argo Nurbawono, Chun Zhang +2
Electronic properties of two-dimensional graphene superlattice made with partial hydrogenation were thoroughly studied via Density Functional Tight Binding approach (DFTB) which in…