Theory
of
Quantum Transport
AG von Oppen
of
Quantum Transport
AG von Oppen
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 also include the physics of the two-dimensional electron system in graphene (monolayers of graphite) which has recently been realized experimentally.
Grants
- DAAD collaborative grant (with A. Yacoby).
- Sfb 290 "Metallic thin films" (2002-2004).
- DAAD-NSF collaborative grant (with M. Raikh, 2003-2004).
- DFG Priority Program "Quantum Hall systems" (2000-2005).
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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