Jump to main content
Jump to site search

Charge governed phase manipulation of tellurium few-layers


Few-layer Tellurium is an emerging quasi-one-dimensional layered material. It is a striking feature that Te has various few-layer allotropes (α – δ). Although these allotropes offer substantially different physical properties, only the α phase has been synthesized in neutral few-layers as it is, so far, the most stable few-layer form. Here, we show the use of hole- or electron-doping could maintain a certain Te phase. The β, α, γ and δ phases appear as the most stable form of a Te bilayer in sequence, respectively, with bandgap variations over 1 eV. In Te tri-layers, a novel metallic chiral α+δ phase emerges, leading to the appearance of chirality. Transitions among these phases, understood at the wavefunction level, are accompanied by the emergence or elimination of inversion centers (α-β, α-γ, α-α+δ), structural anisotropy (α-γ, γ-δ) and chirality (α-α+δ), which could result in substantial changes in optical and other properties. In light of this, this work opens a new avenue for stabilizing different allotropes of layered materials; this is crucial for using their striking properties. It also suggests the possibility toward building mono-elemental electronic and optoelectronic heterostructures or devices, which sounds attractive for future electronics.

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Sep 2018, accepted on 05 Nov 2018 and first published on 06 Nov 2018

Article type: Paper
DOI: 10.1039/C8NR07501H
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Charge governed phase manipulation of tellurium few-layers

    C. Wang, X. Zhou, J. Qiao, L. Zhou, X. KONG, Y. Pan, Z. Cheng, Y. Chai and W. Ji, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR07501H

Search articles by author