A weak topological insulator state in quasi-one-dimensional bismuth iodide

One-dimensional edge state transport in a topological Kondo insulator

Topological insulators,withmetallic boundarystatesprotected against time-reversal-invariant perturbations1, are apromising avenue for realizing exotic quantum states of matter, including various excitations of collective modes predicted in particle physics, such as Majorana fermions2 and axions3. According to theoretical predictions4, a topological insulating state can emerge from not only a we...

One-dimensional helical transport in topological insulator nanowire interferometers.

The discovery of three-dimensional (3D) topological insulators opens a gateway to generate unusual phases and particles made of the helical surface electrons, proposing new applications using unusual spin nature. Demonstration of the helical electron transport is a crucial step to both physics and device applications of topological insulators. Topological insulator nanowires, of which spin-text...

Quasi-One-Dimensional Metal-Insulator Transitions in Compound Semiconductor Surfaces.

Existing examples of Peierls-type 1D systems on surfaces involve depositing metallic overlayers on semiconducting substrates, in particular, at step edges. Here we propose a new class of Peierls system on the (101[over ¯]0) surface of metal-anion wurtzite semiconductors. When the anions are bonded to hydrogen or lithium atoms, we obtain rows of threefold coordinated metal atoms that act as one-...

Magnetic-field-induced Luttinger insulator state in quasi-one-dimensional conductors

We present a heuristic, semiphenomenological model of the anomalous temperature (T ) dependence of resistivity ρxx recently observed experimentally in the quasi-one-dimensional (Q1D) organic conductors of the (TMTSF)2X family in moderately strong magnetic fields. We suggest that a Q1D conductor behaves like an insulator (dρxx/dT < 0), when its effective dimensionality is one, and like a metal (...

Electronic structures of quasi-one-dimensional ferrimagnetic insulator Ca3Co2O6