scholarly journals Two-dimensional electronic transport on the surface of three-dimensional topological insulators

2012 ◽  
Vol 86 (23) ◽  
Author(s):  
Qiuzi Li ◽  
E. Rossi ◽  
S. Das Sarma
Keyword(s):  
Electronic Transport ◽  
Topological Insulators ◽  
Three Dimensional ◽  
Two Dimensional

scholarly journals Oscillatory crossover from two-dimensional to three-dimensional topological insulators

2010 ◽  
Vol 81 (4) ◽  
Author(s):  
Chao-Xing Liu ◽  
HaiJun Zhang ◽  
Binghai Yan ◽  
Xiao-Liang Qi ◽  
Thomas Frauenheim ◽  
...  
Keyword(s):  
Topological Insulators ◽  
Three Dimensional ◽  
Two Dimensional

scholarly journals A three-dimensional photonic topological insulator using a two-dimensional ring resonator lattice with a synthetic frequency dimension

2018 ◽  
Vol 4 (10) ◽  
pp. eaat2774 ◽  
Author(s):  
Qian Lin ◽  
Xiao-Qi Sun ◽  
Meng Xiao ◽  
Shou-Cheng Zhang ◽  
Shanhui Fan
Keyword(s):  
Screw Dislocation ◽  
Topological Insulator ◽  
Topological Insulators ◽  
Three Dimensional ◽  
Photonic Devices ◽  
Three Dimensions ◽  
Ring Resonators ◽  
Two Dimensional ◽  
Topological System ◽  
Frequency Axis

In the development of topological photonics, achieving three-dimensional topological insulators is of notable interest since it enables the exploration of new topological physics with photons and promises novel photonic devices that are robust against disorders in three dimensions. Previous theoretical proposals toward three-dimensional topological insulators use complex geometries that are challenging to implement. On the basis of the concept of synthetic dimension, we show that a two-dimensional array of ring resonators, which was previously demonstrated to exhibit a two-dimensional topological insulator phase, automatically becomes a three-dimensional topological insulator when the frequency dimension is taken into account. Moreover, by modulating a few of the resonators, a screw dislocation along the frequency axis can be created, which provides robust one-way transport of photons along the frequency axis. Demonstrating the physics of screw dislocation in a topological system has been a substantial challenge in solid-state systems. Our work indicates that the physics of three-dimensional topological insulators can be explored in standard integrated photonic platforms, leading to opportunities for novel devices that control the frequency of light.

High Resolution Microscopy of Multi-Layered Biological Crystals

1982 ◽  
Vol 40 ◽  
pp. 80-83
Author(s):  
H.A. Cohen ◽  
T.W. Jeng ◽  
W. Chiu
Keyword(s):  
High Resolution ◽  
Low Dose ◽  
Three Dimensional ◽  
Data Interpretation ◽  
Two Dimensional ◽  
Biological Objects ◽  
Density Maps ◽  
Density Map ◽  
Complex Crystal ◽  
High Resolution Microscopy

This tutorial will discuss the methodology of low dose electron diffraction and imaging of crystalline biological objects, the problems of data interpretation for two-dimensional projected density maps of glucose embedded protein crystals, the factors to be considered in combining tilt data from three-dimensional crystals, and finally, the prospects of achieving a high resolution three-dimensional density map of a biological crystal. This methodology will be illustrated using two proteins under investigation in our laboratory, the T4 DNA helix destabilizing protein gp32*I and the crotoxin complex crystal.

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