Two-dimensional electron systems

Over the past decades, two-dimensional electron systems have been the stage for a large number of discoveries, of which the quantum Hall effects are the most remarkable. As the quality of samples based on GaAs/AlGaAs heterostructures improved over time, many intricate ground states have been observed and analyzed theoretically. Our work in this area has focused on the physics of higher Landau levels, including electronic liquid-crystal states (stripe and bubble phases), negative Coulomb drag, non-Abelian quasiparticle statistics at filling factor 5/2, as well as microwave-induced zero-resistance states. Currently, our interests focus on the physics of the two-dimensional electron system in graphene (monolayers of graphite) which has recently been realized experimentally.


Grants

Selected publications

  • E. Mariani, F. von Oppen
    Flexural phonons in free-standing graphene
    Phys. Rev. Lett. 100, 076801 (2008)
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  • E. Mariani, L.I. Glazman, A. Kamenev, F. von Oppen
    Zero-bias anomaly in the tunneling density of states of graphene
    Phys. Rev. B 76, 165402 (2007)
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  • J. Dietel, L. Glazman, F. Hekking, F. von Oppen
    Microwave photoconductivity of two-dimensional electron systems with unidirectional periodic modulation
    Phys. Rev. B 71, 045329 (2005)
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  • I.V. Gornyi, A.D. Mirlin, F. von Oppen
    Coulomb drag in high Landau levels
    Phys. Rev. B 70, 245302 (2004)
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  • A. Stern, F. von Oppen, E. Mariani
    Geometric phases and quantum entanglement as building blocks for nonabelian quasiparticle statistics
    Phys. Rev. B 70, 205338 (2004)
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  • M.E. Raikh, F. von Oppen
    Coulomb Drag for Strongly Localized Electrons: Pumping Mechanism
    Phys. Rev. Lett. 89, 106601 (2002)
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  • F. von Oppen, S.H. Simon, A. Stern
    Oscillating sign of drag in high Landau levels
    Phys. Rev. Lett. 87, 106803 (2001)
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Link to:

Complete list of publications