Preprint
Metastable short-range charge order in superconducting CuxTiSe2
04 Apr 2025
Abstract
In a vast array of materials, including cuprates, transition metal
dichalcogenides (TMDs) and rare earth tritellurides, superconductivity is found
in the vicinity of short-range charge density wave (CDW) order. The crossover
from long-range to short-range charge order often occurs as quenched disorder
is introduced, yet it is unclear how this disorder disrupts the CDW. Here,
using x-ray photon correlation spectroscopy (XPCS), we investigate the
prototypical TMD superconductor CuxTiSe2 and show that disorder induces
substantial CDW dynamics. We observed the CDW phase fluctuation on a timescale
of minutes to hours above the nominal transition temperature while the order
parameter amplitude remains finite. These long timescale fluctuations prevent
the system from finding the global free energy minimum upon cooling and
ultimately traps it in a short-range ordered metastable state. Our findings
demonstrate how correlated disorder can give rise to a distinct mechanism of
domain formation that may be advantageous to the emergence of
superconductivity.
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Details
- Title
- Metastable short-range charge order in superconducting CuxTiSe2
- Creators
- Thomas SutterColleen LindenauShivani SharmaAndrei FluerasuLutz WiegartGoran KarapetrovAnshul KogarXiaoqian M Chen
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991022047277204721