Charge density waves tuned by biaxial tensile stress

A. Gallo–Frantz, V. L. R. Jacques (), A. A. Sinchenko, D. Ghoneim, L. Ortega, P. Godard, P.-O. Renault, A. Hadj-Azzem, J. E. Lorenzo, P. Monceau, D. Thiaudière, P. D. Grigoriev, E. Bellec and D. Bolloc’h
Additional contact information
A. Gallo–Frantz: Université Paris-Saclay, CNRS
V. L. R. Jacques: Université Paris-Saclay, CNRS
A. A. Sinchenko: Université Paris-Saclay, CNRS
D. Ghoneim: Université Paris-Saclay, CNRS
L. Ortega: Université Paris-Saclay, CNRS
P. Godard: CNRS-Université de Poitiers-ENSMA
P.-O. Renault: CNRS-Université de Poitiers-ENSMA
A. Hadj-Azzem: Institut Néel
J. E. Lorenzo: Institut Néel
P. Monceau: Institut Néel
D. Thiaudière: L’Orme des Merisiers
P. D. Grigoriev: L. D. Landau Institute for Theoretical Physics
E. Bellec: NRS
D. Bolloc’h: Université Paris-Saclay, CNRS

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract The precise arrangement and nature of atoms drive electronic phase transitions in condensed matter. To explore this tenuous link, we developed a true biaxial mechanical deformation device working at cryogenic temperatures, compatible with x-ray diffraction and transport measurements, well adapted to layered samples. Here we show that a slight deformation of TbTe3 can have a dramatic influence on its Charge Density Wave (CDW), with an orientational transition from c to a driven by the a/c parameter, a tiny coexistence region near a = c, and without space group change. The CDW transition temperature Tc displays a linear dependence with $$\left\vert a/c-1\right\vert$$ a / c − 1 while the gap saturates out of the coexistence region. This behaviour is well accounted for within a tight-binding model. Our results question the relationship between gap and Tc in RTe3 systems. This method opens a new route towards the study of coexisting or competing electronic orders in condensed matter.

Date: 2024
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DOI: 10.1038/s41467-024-47626-5

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