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Preprint
In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe$_2
17 Jan 2025
Abstract
We report measurements of anisotropic triple-$q$ charge density wave (CDW)
fluctuations in the transition metal dichalcogenide 1$T$-TiSe$_2$ over a large
volume of reciprocal space with X-ray diffuse scattering. Above the transition
temperature, $T_{\text{CDW}}$, the out-of-plane diffuse scattering is
characterized by rod-like structures which indicate that the CDW fluctuations
in neighboring layers are largely decoupled. In addition, the in-plane diffuse
scattering is marked by ellipses which reveal that the in-plane fluctuations
are anisotropic. Our analysis of the diffuse scattering line shapes and
orientations suggests that the three charge density wave components contain
independent phase fluctuations. At $T_{\text{CDW}}$, long range coherence is
established in both the in-plane and out-of-plane directions, consistent with
the large observed value of the CDW gap compared to $T_{\text{CDW}}$, and the
predicted presence of a hierarchy of energy scales.
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Details
- Title
- In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe$_2
- Creators
- Xuefei GuoAnshul KogarJans HenkeFelix FlickerFernando de JuanStella X. -L SunIssam KhayrYingying PengSangjun LeeMatthew J KrogstadStephan RosenkranzRaymond OsbornJacob P. C RuffDavid B LioiGoran KarapetrovDaniel J CampbellJohnpierre PaglioneJasper van WezelTai C ChiangPeter Abbamonte
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991022020437704721