Doping Nature of Native Defects in 1<em>T</em>-TiSe<sub>2</sub>

Hildebrand, B.; Didiot, C.; Novello, Anna Maria; Monney, G.; Scarfato, Alessandro; Ubaldini, Alberto; Berger, H.; Bowler, D. R.; Renner, Christoph; Aebi, P.

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Title		Doping Nature of Native Defects in 1T-TiSe₂
Authors		Hildebrand, B. Didiot, C. Novello, Anna Maria Monney, G. Scarfato, Alessandro Ubaldini, Alberto Berger, H. Bowler, D. R. Renner, Christoph Aebi, P. show all authors [1 - 10]
Published in		Physical Review Letters. 2014, vol. 112, no. 19, p. 197001
Abstract		The transition-metal dichalcogenide 1T-TiSe2 is a quasi-two-dimensional layered material with a charge density wave (CDW) transition temperature of TCDW ≈ 200 K. Self-doping effects for crystals grown at different temperatures introduce structural defects, modify the temperature-dependent resistivity, and strongly perturbate the CDW phase. Here, we study the structural and doping nature of such native defects combining scanning tunneling microscopy or spectroscopy and ab initio calculations. The dominant native single atom dopants we identify in our single crystals are intercalated Ti atoms, Se vacancies, and Se substitutions by residual iodine and oxygen.
Keywords		STM/STS — Dichalcogenide — Doping atoms
Identifiers		DOI: 10.1103/PhysRevLett.112.197001
Full text		Article (Published version) (1.1 MB) - Free access Other version: http://link.aps.org/doi/10.1103/PhysRevLett.112.197001
Structures		Faculté des sciences / Section de physique / Département de physique de la matière quantique
Citation (ISO format)		HILDEBRAND, B. et al. Doping Nature of Native Defects in 1T-TiSe₂. In: Physical Review Letters, 2014, vol. 112, n° 19, p. 197001. https://archive-ouverte.unige.ch/unige:37831