We report measurements of anisotropic triple-q charge density wave (CDW) fluctuations in the transition metal dichalcogenide 1T-TiSe2 over a large volume of reciprocal space with x-ray diffuse scattering. Above the transition temperature, TCDW, the in-plane diffuse scattering is marked by ellipses which reveal that the in-plane fluctuations are anisotropic. In addition, the out-of-plane diffuse scattering is characterized by rodlike structures which indicate that the CDW fluctuations in neighboring layers are largely decoupled. Our analysis of the diffuse scattering line shapes and orientations suggests that the three charge density wave components contain independent phase fluctuations with a hierarchy of length scales, leading to intricate fluctuation patterns that go beyond the conventional 2D-to-3D crossover picture.
Journal article
In-Plane Anisotropy of Charge Density Wave Fluctuations in 1 T − TiSe 2
Physical review letters, v 135(13), 136102
Sep 2025
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- Title
- In-Plane Anisotropy of Charge Density Wave Fluctuations in 1 T − TiSe 2
- Creators
- Xuefei Guo - University of Illinois SystemAnshul Kogar - University of California, Los AngelesJans Henke - University of AmsterdamFelix FlickerFernando de Juan - Donostia International Physics CenterStella X.-L. Sun - University of Illinois SystemIssam Khayr - University of Illinois SystemYingying Peng - Peking UniversitySangjun Lee - University of Illinois SystemMatthew J. Krogstad - Argonne National LaboratoryStephan Rosenkranz - Argonne National LaboratoryRaymond Osborn - Argonne National LaboratoryJacob P. C. Ruff - Cornell UniversityDavid B. Lioi - Drexel UniversityGoran Karapetrov - Drexel UniversityDaniel J. Campbell - University of Maryland, College ParkJohnpierre Paglione - University of Maryland, College ParkJasper van Wezel - University of AmsterdamTai C. ChiangPeter Abbamonte - University of Illinois System
- Publication Details
- Physical review letters, v 135(13), 136102
- Publisher
- American Physical Society; COLLEGE PK
- Number of pages
- 6
- Grant note
- U.S. Department of Energy, Office of Basic Energy Sciences: DE-FG02-06ER46285, DE-SC0023017 Engineering and Physical Sciences Research Council: EP/X012239/1, PID2021-128760NB0-I00, MCIN/AEI/10.13039/501100011033/FEDER European UnionGordon and Betty Moore Foundation EPiQS Initiative: GBMF9452 Gordon and Betty Moore Foundation ' s EPiQS Initiative: GBMF9071 U.S. National Science Foundation (NSF): DMR2303090 Maryland Quantum Materials CenterU.S. Department of Energy (DOE) , Office of ScienceOffice of Basic Energy Sciences, Division of Materials Science and Engineering: DE-FG02-07ER46383 National Science Foundation: ECCS-1711015 U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering DivisionU.S. Department of Energy, Office of Science, Office of Basic Energy Sciences: DE-AC02-06CH11357
We thank Doug Robinson for help with our x-ray diffraction measurements. X-ray experiments were supported by the U.S. Department of Energy, Office of Basic Energy Sciences Grant No. DE-FG02-06ER46285 (P. A.) and Grant No. DE-SC0023017 (A. K.) . F. F. acknowledges support from the Engineering and Physical Sciences Research Council, Grant No. EP/X012239/1. F. J. acknowledges support from Grant No. PID2021-128760NB0-I00 from the Spanish MCIN/AEI/10.13039/501100011033/FEDER, European Union. P. A. acknowl-edges the Gordon and Betty Moore Foundation EPiQS Initiative through Grant No. GBMF9452. Research at the University of Maryland was supported by the Gordon and Betty Moore Foundation ' s EPiQS Initiative through Grant No. GBMF9071, the U.S. National Science Foundation (NSF) Grant No. DMR2303090, and the Maryland Quantum Materials Center. T. C. C. is supported by the U.S. Department of Energy (DOE) , Office of Science (OS) , Office of Basic Energy Sciences, Division of Materials Science and Engineering, under Grant No. DE-FG02-07ER46383. G. K. acknowledges support by the National Science Foundation under Grant No. ECCS-1711015. Work at Argonne (M. J. K., S. R., R. O.: data collection and reduction) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001582043200012
- Other Identifier
- 991022121059804721