Atomically Precise Lateral Modulation of a Two-Dimensional Electron Liquid in Anatase TiO2 Thin Films

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	Atomically Precise Lateral Modulation of a Two-Dimensional Electron Liquid in Anatase TiO2 Thin Films
	Bruno, F. Y.; Wang, Z.; Zhong, Z.; Walker, S. McKeown; Ristic, Z.; Ma, J. -Z.; Shi, M.; Mesot, J.; Baumberger, F.; Radovic, M.
刊名	NANO LETTERS
	2017
卷号	17 期号:4 页码:2561-2567
ISSN号	1530-6984
英文摘要	Engineering the electronic band structure of two-dimensional electron liquids (2DELs) confined at the surface or interface of transition metal oxides is key to unlocking their full potential. Here we describe a new approach to tailoring the electronic structure of an oxide surface 2DEL demonstrating the lateral modulation of electronic states with atomic scale precision on an unprecedented length scale comparable to the Fermi wavelength. To this end, we use pulsed laser deposition to grow anatase TiO2 films terminated by a (1 x 4) in-plane surface reconstruction. Employing photostimulated chemical surface doping we induce 2DELs with tunable carrier densities that are confined within a few TiO2 layers below the surface. Subsequent in situ angle-resolved photoemission experiments demonstrate that the (1 x 4) surface reconstruction provides a periodic lateral perturbation of the electron liquid. This causes strong backfolding of the electronic bands, opening of unidirectional gaps and a saddle point singularity in the density of states near the chemical potential.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13918]
专题	2017专题
推荐引用方式 GB/T 7714	Bruno, F. Y.,Wang, Z.,Zhong, Z.,et al. Atomically Precise Lateral Modulation of a Two-Dimensional Electron Liquid in Anatase TiO2 Thin Films[J]. NANO LETTERS,2017,17(4):2561-2567.
APA	Bruno, F. Y..,Wang, Z..,Zhong, Z..,Walker, S. McKeown.,Ristic, Z..,...&Patthey, L..(2017).Atomically Precise Lateral Modulation of a Two-Dimensional Electron Liquid in Anatase TiO2 Thin Films.NANO LETTERS,17(4),2561-2567.
MLA	Bruno, F. Y.,et al."Atomically Precise Lateral Modulation of a Two-Dimensional Electron Liquid in Anatase TiO2 Thin Films".NANO LETTERS 17.4(2017):2561-2567.