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  1. Article

    Open Access

    Observing a scale anomaly and a universal quantum phase transition in graphene

    One of the most interesting predictions resulting from quantum physics, is the violation of classical symmetries, collectively referred to as anomalies. A remarkable class of anomalies occurs when the continuo...

    O. Ovdat, **hai Mao, Yuhang Jiang, E. Y. Andrei, E. Akkermans in Nature Communications (2017)

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  2. Article

    Observation of Van Hove singularities in twisted graphene layers

    When a Van Hove singularity exists near the Fermi energy of a solid’s density of states, it can cause a variety of exotic phenomena to emerge. Scanning tunnelling microscope measurements indicate that when gra...

    Guohong Li, A. Luican, J. M. B. Lopes dos Santos, A. H. Castro Neto… in Nature Physics (2010)

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    Article

    Dynamic instabilities and memory effects in vortex matter

    The magnetic flux line lattice in type II superconductors serves as a useful system in which to study condensed matter flow, as its dynamic properties are tunable. Recent studies have shown a number of puzzlin...

    Y. Paltiel, E. Zeldov, Y. N. Myasoedov, H. Shtrikman, S. Bhattacharya… in Nature (2000)

  4. No Access

    Article

    Evidence for a glassy phase in the vortex state of 2H−NbSe2

    We have measured the DC response and RF surface impedance of 2H−NbSe 2 single crystals in fields up to 2 Tesla. The results suggest that there are two distinct states of the vortex lattice; one is...

    W. Henderson, E. Y. Andrei, M. Higgins, S. Bhattacharya in Czechoslovak Journal of Physics (1996)

  5. No Access

    Chapter

    Experiments on Two-Dimensional Wigner Crystals

    In 1934 Wigner predicted(1) that the conduction electrons in a metal would undergo a transition from a liquid state to form a crystal when their density was sufficiently reduced. The crystal melts at a critical d...

    E. Y. Andrei, F. J. B. Williams… in Physics of Low-Dimensional Semiconductor S… (1993)

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    Article

    Observation of tunneling and magneto-tunneling out of a 2D Wigner crystal

    We measured the escape rates of surface state electrons from an electron layer confined at the liquid helium-vacuum interface in the temperature range of 30–450mK, and for densities 0.02–2.2×108 cm −2. Below 200m...

    S. Yücel, L. Menna, E. Y. Andrei in Journal of Low Temperature Physics (1992)

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    Chapter and Conference Paper

    Electron Solid Formation at a Modulation Doped Heterojunction in a High Magnetic Field

    By means of a radiofrequency spectroscopy experiment which tests for shear rigidity by detecting a gapless magneto-phonon excitation branch, we are able to affirm that electrons at a high quality modulation do...

    F. I. B. Williams, D. C. Glattli, G. Deville… in High Magnetic Fields in Semiconductor Phys… (1989)