Uniaxial pressure control of competing order in the kagome ScV6Sn6

In quantum materials, correlated phases with comparable energy scales often give rise to competing orders. In the recently discovered correlated kagome metal ScV6Sn6, we have recently reported two competing charge density waves (CDW), driven by the momentum dependent electron phonon interaction. In this proposal, we want to measure the temperature dependence of the long range CDW with propagation vector 1/3 1/3 1/3 and the fluctuating charge precursor at L=1/2 under different values of uniaxial pressure. By breaking the in-plane rotational symmetry of the kagome net, we aim at tuning and controlling the competition between the different charge orders, the electron-phonon interaction and the phonon fluctuations derived from the flat-ish character of the phonon bands.