Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session F53: Transport Properties of 2D Materials
8:00 AM–11:00 AM,
Tuesday, March 3, 2020
Room: Mile High Ballroom 1F
Sponsoring
Unit:
DCMP
Chair: Alexey Lipatov
Abstract: F53.00004 : Preferential out-of-plane conduction and quasi-one-dimensional electronic states in layered van der Waals material 1T-TaS2
Presenter:
Edoardo Martino
(Ecole Polytechnique Federale de Lausanne)
Authors:
Edoardo Martino
(Ecole Polytechnique Federale de Lausanne)
Konstantin Semeniuk
(Ecole Polytechnique Federale de Lausanne)
Alla Arakcheeva
(Ecole Polytechnique Federale de Lausanne)
Carsten Putzke
(Ecole Polytechnique Federale de Lausanne)
Philip Moll
(Ecole Polytechnique Federale de Lausanne)
helmuth berger
(Ecole Polytechnique Federale de Lausanne)
Ivo Batistic
(University of Zagreb)
Eduard Tutiš
(Institute of Physics - Zagreb)
Ana Akrap
(University of Fribourg)
Laszlo Forro
(Ecole Polytechnique Federale de Lausanne)
Here, we reveal c-axis-oriented quasi-one-dimensional electronic states in 1T-TaS2, a layered system hosting a plethora of diverse phases, by probing its out-of-plane electrical resistivity using focused-ion-beam-tailored crystals. The in-plane conduction appears non-metallic due to presence of a unique nanoarray of charge density wave (CDW) domains. All the while, the interlayer resistivity has a metallic temperature dependence with the anisotropy close to one, as a result of intertwining of the orbital and CDW orders. The compound is known for what was believed to be a Mott-type localisation below 150 K. Yet with our data, supplemented by ab-initio calculations, we interpret the transition as a Peierls-like instability of the quasi-one-dimensional electronic structure. Our findings present a very unintuitive behaviour in a van der Waals crystal.
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