TiTe2

/Tag: TiTe2

Emergence of charge density waves and a pseudogap in single-layer TiTe2. (arXiv:1805.05275v1 [cond-mat.mes-hall])

2018-05-15T19:58:54+00:00May 15th, 2018|Categories: Publications|Tags: |

Two-dimensional materials constitute a promising platform for developing nanoscale devices and systems. Their physical properties can be very different from those of the corresponding three-dimensional materials because of extreme quantum confinement and dimensional reduction. Here we report a study of TiTe$_2$ from the single-layer to the bulk limit. Using angle-resolved photoemission spectroscopy and scanning tunneling microscopy and spectroscopy, we observed the emergence of a (2 x 2) charge density wave order in single-layer TiTe$_2$ with a transition temperature of 92 $pm$ 3 K. Also observed was a pseudogap of about 28 meV at the Fermi level at 4.2 K. Surprisingly, no charge density wave transitions were observed in 2- and multi-layer TiTe$_2$, despite the quasi-two-dimensional nature of the material in the bulk. The unique charge density wave phenomenon in the single layer raises intriguing questions that challenge the prevailing thinking about the mechanisms of charge density wave formation.

Published : "arXiv Mesoscale and Nanoscale Physics".

Emergence of charge density waves and a pseudogap in single-layer TiTe<sub>2</sub>

2017-09-11T10:30:18+00:00September 11th, 2017|Categories: Publications|Tags: |

Emergence of charge density waves and a pseudogap in single-layer TiTe2Nature Communications, Published online: 11 September 2017; doi:10.1038/s41467-017-00641-1Due to reduced dimensionality, the properties of 2D materials are often different from their 3D counterparts. Here, the authors identify the emergence of a unique charge density wave (CDW) order in monolayer TiTe2 that challenges the current understanding of CDW formation.

Published in: "Nature Communications".

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