Temperature-driven reorganization of electronic order in CsV3Sb5

Stahl Q, Chen D, Ritschel T, Shekhar C, Sadrollahi E, Rahn MC, Ivashko O, V. Zimmermann M, Felser C, Geck J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review B American Physical Society

Book Volume: 105

Article Number: 195136

Journal Issue: 19

DOI: 10.1103/PhysRevB.105.195136

Abstract

We report x-ray diffraction studies of the electronic ordering instabilities in the kagome material CsV3Sb5 as a function of temperature and applied magnetic field. Our zero-field measurements between 10 and 120 K reveal an unexpected reorganization of the three-dimensional electronic order in the bulk of CsV3Sb5: At low temperatures, a 2×2×2 superstructure modulation due to electronic order is observed, which upon warming changes to a 2×2×4 superstructure at 60 K. The electronic order-order transition discovered here involves a change in the stacking of electronically ordered V3Sb5 layers, which coincides with anomalies previously observed in magnetotransport measurements. This implies that the temperature-dependent three-dimensional electronic order plays a decisive role for transport properties, which are related to the Berry curvature of the V bands. We also show that the bulk electronic order in CsV3Sb5 breaks the sixfold rotational symmetry of the underlying P6/mmm lattice and perform a crystallographic analysis of the 2×2×2 phase. The latter yields two possible superlattices, namely a staggered star-of-David and a staggered inverse star-of-David structure. Applied magnetic fields up to 10 T have no effect on the x-ray diffraction signal. This, however, does not rule out time-reversal symmetry breaking in CsV3Sb5.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Deutsches Elektronen-Synchrotron DESY DE Germany (DE)

How to cite

APA:

Stahl, Q., Chen, D., Ritschel, T., Shekhar, C., Sadrollahi, E., Rahn, M.C.,... Geck, J. (2022). Temperature-driven reorganization of electronic order in CsV3Sb5. Physical Review B, 105(19). https://doi.org/10.1103/PhysRevB.105.195136

MLA:

Stahl, Q., et al. "Temperature-driven reorganization of electronic order in CsV3Sb5." Physical Review B 105.19 (2022).

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