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Article Dans Une Revue Nature Communications Année : 2024

Charge density waves tuned by biaxial tensile stress

V. Jacques
D. Ghoneim
L. Ortega
José-Emilio Lorenzo
E. Bellec
D. Le Bolloc’h

Résumé

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 TbTe$_3$ 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 T$_c$ displays a linear dependence with $\left\vert a/c-1\right\vert$ 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 T$_c$ in RTe$_3$ systems. This method opens a new route towards the study of coexisting or competing electronic orders in condensed matter.
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Dates et versions

hal-04569145 , version 1 (20-10-2023)
hal-04569145 , version 2 (06-05-2024)

Identifiants

Citer

Antoine Gallo--Frantz, V. Jacques, A. Sinchenko, D. Ghoneim, L. Ortega, et al.. Charge density waves tuned by biaxial tensile stress. Nature Communications, 2024, 15, pp.3667. ⟨10.1038/s41467-024-47626-5⟩. ⟨hal-04569145v2⟩
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