Pristine graphene has been considered one of the most promising materials because of its
excellent physical and chemical properties. However, various defects in graphene produced …

After the first unequivocal demonstration of spin transport in graphene [Tombros et al.,
Nature (London) 448, 571–574 (2007)], surprisingly at room temperature, it was quickly …

The photocurrent generation in photovoltaics relies essentially on the interface of pn junction
or Schottky barrier with the photoelectric efficiency constrained by the Shockley-Queisser …

The first-principles band theory paradigm has been a key player not only in the process of
discovering new classes of topologically interesting materials, but also for identifying salient …

Topological phases with insulating bulk and gapless surface or edge modes have attracted
intensive attention because of their fundamental physics implications and potential …

Topological insulators represent a new quantum state of matter which is characterized by
peculiar edge or surface states that show up due to a topological character of the bulk wave …

Two-dimensional topological insulators (2D TIs) are a remarkable class of atomically thin
layered materials that exhibit unique symmetry-protected helical metallic edge states with an …

Graphene exhibits superior mechanical strength, high thermal conductivity, strong light–
matter interactions, and, in particular, exceptional electronic properties. These merits make …

Graphene has attracted great interest because of its remarkable properties and numerous
potential applications. A comprehensive understanding of its structural and dynamic …

We propose two-dimensional (2D) topological insulators (TIs) in functionalized germanenes
(Ge X, X= H, F, Cl, Br, or I) using first-principles calculations. We find GeI is a 2D TI with a …