Dresden 2020 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 47: 2D Materials IV: Interfacial Interactions (joint session O/CPP/HL)
HL 47.10: Talk
Wednesday, March 18, 2020, 12:45–13:00, WIL B321
Long-range charge order induced by strain in layered IrTe2 revealed by ARPES — •Chris W. Nicholson1, Maxime Rumo1, Geoffroy Kremer1, Thomas Jaouen1, Baptiste Hildebrand1, Marie-Laure Mottas1, Björn Salzmann1, Aki Pulkinnen2, Bernardo Barbiellini2, Timur Kim3, Saumya Mukherjee3, Cephise Cacho3, Matthias Muntwiler4, Fabian von Rohr5, Philipp Aebi1, and Claude Monney1 — 1University of Fribourg, Switzerland — 2LUT University, Finland — 3Diamond Light Source, UK — 4Swiss Light Source, Switzerland — 5University of Zurich, Switzerland
Uniaxial strain combined with ARPES offers a relatively new route to studying the interplay between the lattice and electronic structure. The wide range of properties displayed by layered transition metal dichalcogenides makes them intriguing candidates for exploring this.
Here we present ARPES data revealing the influence of tensile strain on the electronic structure of IrTe2, which exhibits a complicated mixture of one dimensional charge ordered phases at low temperatures but very broad electronic bands [1]. The application of strain induces a single, long-range ordered phase, with clear quasi-1D features at the Fermi level and sharp bands over a wide binding energy range. By comparison with electronic structure calculations, we will discuss the mechanism of this strain-induced stabilization with reference to the redistribution of charge between Ir and Te bonds [2].
[1] Ko et al, Nat. Comm 6, 7342 (2015)
[2] Nicholson et al, in preparation