We investigate the effect of topological disorder on a system of forced threshold elements, where each element is arranged on top of complex heterogeneous networks. Numerical results indicate that the response of the system to a weak signal can be amplified at an intermediate level of topological disorder, thus indicating the occurrence of topological-disorder-induced resonance. Using mean fiel...

Topological insulators host spin-polarized surface states born out of the energetic inversion of bulk bands driven by the spin-orbit interaction. Here we discover previously unidentified consequences of band-inversion on the surface electronic structure of the topological insulator Bi2Se3. By performing simultaneous spin, time, and angle-resolved photoemission spectroscopy, we map the spin-pola...

This paper presents a new atlas-based segmentation framework for the delineation of major regions in magnetic resonance brain images employing an atlas of the global topological structure as well as a statistical atlas of the regions of interest. A segmentation technique using fast marching methods and tissue classification is proposed that guarantees strict topological equivalence between the ...

Thermoelectric coefficients of an ultra-thin topological insulator are presented here. The hybridization between top and bottom surface states of a topological insulator plays a significant role. In the absence of a magnetic field, the thermopower increases and thermal conductivity decreases with an increase in the hybridization energy. In the presence of a magnetic field perpendicular to the u...

We study quasi-bound states of two electrons that arise in two-dimensional materials with a Mexican-hat dispersion (MHD) at an energy above its central maximum. The width the resonance local density created by pairs is determined hybridization atomic orbitals, due to which MHD formed. mechanism state formation fact effective reduced mass near top negative. An unusual feature can vanish and then...

Weyl fermions (WFs) in the type-II semimetal (WSM) ${\mathrm{WTe}}_{2}$ are difficult to resolve experimentally because bands disperse an extremely narrow region of ($E\text{\ensuremath{-}}k$) space. Here, by using DFT-assisted high-resolution $^{125}\mathrm{Te}$ solid-state nuclear magnetic resonance (ssNMR) temperature range 50--700 K, we succeeded detecting low energy WF excitations and moni...

We report the surface phonon dispersion of topological insulator Sb2Te3 together with a number additional inelastic events, including resonance enhancement, kinematical focusing and surfing.

The idea of the effective topological theory for high-energy scattering proposed by H. and E. Verlinde is applied to the (2 + 1) dimensional gravity with Einstein action plus Chern-Simons terms. The calculational steps in the topological description are compared with the eikonal approximation. It is shown that the Lagrangian of the effective topological theory turns out to vanish except for bou...

Recent experiments show the thermal growth of dislocation lines in unltapure bcc He. The activation energy for the growth of the dislocation lines is found to agree with the activation energy of mass diffusion. We propose that these dislocations are topological defects in the phase of the complex order-parameter which describes the dynamic zero-point atomic correlations, unique to the bcc phase...

Submitted for the MAR13 Meeting of The American Physical Society Topological phase transition in hexagonal boron-nitride bilayers modulated by gate voltage1 GUOJUN JIN, XUECHAO ZHAI, Nanjing University — We study the gate-voltage modulated electronic properties of hexagonal boron-nitride bilayers with two different stacking structures in the presence of intrinsic and Rashba spin-orbit interacti...