Observation of a Fractional Quantum Hall State at $\nu=1/4$ in a Wide GaAs Quantum Well
| Autor: | Luhman, D. R., Pan, W., Tsui, D. C., Pfeiffer, L. N., Baldwin, K. W., West, K. W. |
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| Rok vydání: | 2008 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.101.266804 |
| Popis: | We report the observation of an even-denominator fractional quantum Hall (FQH) state at $\nu=1/4$ in a high quality, wide GaAs quantum well. The sample has a quantum well width of 50 nm and an electron density of $n_e=2.55\times10^{11}$ cm$^{-2}$. We have performed transport measurements at $T\sim35$ mK in magnetic fields up to 45 T. When the sample is perpendicular to the applied magnetic field, the diagonal resistance displays a kink at $\nu=1/4$. Upon tilting the sample to an angle of $\theta=20.3^o$ a clear FQH state at emerges at $\nu=1/4$ with a plateau in the Hall resistance and a strong minimum in the diagonal resistance. Comment: Accepted for publication in Phys. Rev. Lett |
| Databáze: | arXiv |
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