[PDF] Top 20 Scanning Tunnelling Spectroscopic Studies of Dirac Fermions in Graphene and Topological Insulators

... where Dirac fermions become completely delocalized over the sample and yet remain alternately localized and anti-localized in the pseudo-spin projection in the real space ...a graphene nano- bubbles ... See full document

... a spectroscopic statement that HOPG has a high-mobility quasi-2DEG, which is eligible to show the quantum Hall ...of Dirac fermion’s Landau level was realized by Andrei’s group of Rutgers University ... See full document

... the graphene sample resembled the spectra found in mechanically exfoliated graphene and are Dirac-like (V-shaped) except a substantially larger zero bias conductance and an addition of several weak ... See full document

... This thesis would not have been possible without the help of many people. First and foremost, I would like to thank my adviser Xie Chen, for her guidance and support over the past 5 years, and for her patience and ... See full document

... universe. Topological insulators (TIs) are a recent example of such systems exhibiting exotic physical phenomenon in condensed ...The topological surface states (TSS) are guaranteed by the materials ... See full document

... soon as one moves away from normal incidence, the transmission is no longer integer-valued. In j)articular it dips below T — 2. indicating sul^stantial scat­ tering. Note that the drop in transmission at kj. = 0 at E ~ E ... See full document

... Disorder effects in non-chiral 1d systems, e.g., localization phenomena due to the in- troduction of random potential, were also studied theoretically and computationally for many years (for a review see, e.g. [120]). ... See full document

... To keep the present paper self-contained, this section briefly reviews the results in Refs. [3, 11] regarding the geometric construction of the Feynman propagator [2] using the bi-spinor of parallel transport (8) and its ... See full document

... ν the electron-electron interactions are studied by using the Jordan Wigner phase for composite fermions which give rise to a Luttinger liquid. When the metallic disk is in the proximity with a superconductor, a ... See full document

... should be a significant amount of out-of-plane spin moments (up to 60%) to maintain a Berry phase change of π in one circuit, as required by topological invariance. Such behavior can lead to interesting features, ... See full document

... like graphene, as well as ensuring surface detection sensitivity and compositional contrast from the outermost layers of the ...monolayer graphene [157], the probability of generated signal electrons that ... See full document

... resonant tunnelling, same device as in Figure ...quasiparticles tunnelling from top (left) to bottom (right) graphene layers in zero (black arrow) and finite (purple arrow) magnetic field (depicted ... See full document

... to graphene which is cheap and flexible. Graphene which has two dimensional honeycomb-like carbon structures is expected to act as an excellent conducting transparent electrode material [47,48] because of ... See full document

... press technique. The addition of filler in fractional amount to the solid polymer matrix at room temperature further enhances the ionic conductivity. The membranes were subjected to cycling, FT-IR and Raman ... See full document

... 3 structure was found, caused by a perturbation of the charge density in the vicinity of these defects (Friedel oscillations) 2{4]. There is another study of superstructures near grain boundaries which are caused by ... See full document

... In this section we review the theory that will form the basis of our discussion of topological insulators. We begin by briefly discussing lattices and crystal structures. We then discuss two versions of an ... See full document

... computed for di ff erent isomers at the unrestricted DFT level to determine the most stable one. We used the B3LYP func- tional 29 with the 6-31+G(d) basis set for the carbon atoms and the 6-311+g(2df ) basis set for the ... See full document

... dle” type. Fermi curves passing through or near these hyperbolic points are local maxima and minima. Since in these points “trajectories” of quasi-particle motion (i.e., the configuration space of the system) are ... See full document

... (i.e., topological trivial and topological nontrivial), one can create edge states that are spatially confined around the interface between two plasmonic ...additional topological edge states as ... See full document

... a graphene monolayer are two- dimensional (2D) Dirac fermions [1], where a gap Δ can be opened, ...[1]. Graphene, thus, provides experimental access to relativistic quantum effects such as ... See full document