Aharonov-Bohm interference of fractional quantum Hall edge modes
| Autor: | Saeed Fallahi, Michael J. Manfra, James Nakamura, Harshad Sahasrabudhe, Geoffrey C. Gardner, Rajib Rahman, Shuang Liang |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Phase (waves) General Physics and Astronomy FOS: Physical sciences Landau quantization Quantum Hall effect Interference (wave propagation) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Topological quantum computer 010305 fluids & plasmas Interferometry Quantum mechanics 0103 physical sciences Fractional quantum Hall effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Coulomb 010306 general physics |
| DOI: | 10.48550/arxiv.1901.08452 |
| Popis: | We demonstrate operation of a small Fabry-Perot interferometer in which highly coherent Aharonov-Bohm oscillations are observed in the integer and fractional quantum Hall regimes. Using a novel heterostructure design, Coulomb effects are drastically suppressed. Coherency of edge mode interference is characterized by the energy scale for thermal damping, ${T_0=206}mK$ at $\nu=1$. Selective backscattering of edge modes originating in the ${N=0,1,2}$ Landau levels allows for independent determination of inner and outer edge mode velocities. Clear Aharonov-Bohm oscillations are observed at fractional filling factors $\nu=2/3$ and $\nu=1/3$. Our device architecture provides a platform for measurement of anyonic braiding statistics. Comment: 18 pages, 11 figures. A revised version of this manuscript and supplementary material will appear in Nature Physics |
| Databáze: | OpenAIRE |
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