A metallic mosaic phase and the origin of Mott-insulating state in 1T-TaS2

• DOI: 10.1038/ncomms10956
• Publication Date: 2016-03-10T10:27:18Z
• Authors: Liguo Ma; Cun Ye; Yijun Yu; Xiu Fang Lu; Xiaohai Niu; Sejoong Kim; Donglai Feng; David Tománek; Young-Woo Son; Xian Hui Chen; Yuanbo Zhang
• Keywords: Mott insulator; Charge Density Wave

Abstract Electron–electron and electron–phonon interactions are two major driving forces that stabilize various charge-ordered phases of matter. In layered compound 1T-TaS 2 , the intricate interplay between generates a Mott-insulating ground state with peculiar charge-density-wave (CDW) order. The delicate balance also makes it possible to use external perturbations create manipulate novel in this material. Here, we study mosaic CDW phase induced by voltage pulses, find new exhibits electronic structures entirely different from original Mott state. consists nanometre-sized domains characterized well-defined shifts order parameter topmost layer, altered stacking relative layers underneath. We discover nature is dictated order, our results shed fresh light on origin .