Observation of new plasmons in the fractional quantum Hall effect: Interplay of topological and nematic orders
- Columbia Univ., New York, NY (United States
- Technische Univ. Munech, Garching (Germany); Univ. of Munster (Germany)
- Princeton Univ., NJ (United States)
- Purdue Univ., West Lafayette, IN (United States)
- Purdue Univ., West Lafayette, IN (United States); School of Materials Engineering and School of Electrical and Computer Engineering, IN (United States)
Collective modes of exotic quantum fluids reveal underlying physical mechanisms responsible for emergent quantum states. We observe unexpected new collective modes in the fractional quantum Hall (FQH) regime: intra–Landau-level plasmons measured by resonant inelastic light scattering. The plasmons herald rotational-symmetry-breaking (nematic) phases in the second Landau level and uncover the nature of long-range translational invariance in these phases. The intricate dependence of plasmon features on filling factor provides insights on interplays between topological quantum Hall order and nematic electronic liquid crystal phases. A marked intensity minimum in the plasmon spectrum at Landau level filling factorv= 5/2 strongly suggests that this paired state, which may support non-Abelian excitations, overwhelms competing nematic phases, unveiling the robustness of the 5/2 superfluid state for small tilt angles. Atv= 7/3, a sharp and strong plasmon peak that links to emerging macroscopic coherence supports the proposed model of a FQH nematic state.
- Research Organization:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); Gordon and Betty Moore Foundation
- Grant/Contract Number:
- SC0006671; DMR-1306976; GBMF4420; DMR 1420541
- OSTI ID:
- 1610885
- Journal Information:
- Science Advances, Vol. 5, Issue 3; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Interaction-dependent anisotropy of fractional quantum Hall states
|
journal | August 2019 |
Density matrix renormalization group study of nematicity in two dimensions: Application to a spin-1 bilinear-biquadratic model on the square lattice
|
journal | January 2020 |
Interaction-dependent anisotropy of fractional quantum Hall states | text | January 2019 |
Density Matrix Renormalization Group Study of Nematicity in Two Dimensions: Application to a Spin-$1$ Bilinear-Biquadratic Model on the Square Lattice | text | January 2020 |
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