Time, momentum, energy resolved pump probe tunneling spectroscopy of the nonequilibrium electrons in a Landau level (part2)

ORAL

Abstract

We use time, momentum, and energy resolved pump probe tunneling spectroscopy (Tr-MERTS) to study the nonequilibrium electronic states in a quantum Hall system. Our Tr-MERTS spectra show the slow relaxation of the spin polarized electrons in a ferromagnetic quantum Hall state at \nu = 1. In addition, the spectra reveal a transient splitting with a lifetime of a few microseconds that appears when a small number of electrons is pumped into the \nu = 1 state. Our results demonstrate a potential broad applicability of Tr-MERTS for studying the nonequilibrium physics in unconventional quantum Hall states or other flat-band systems realized in two-dimensional materials.

*This work is supported by the Basic Energy Sciences Program of the Office of Science of the U.S. Department of Energy through contract no. FG02-08ER46514.

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Presenters

  • Heun Mo Yoo

    • Massachusetts Institute of Technology MIT

Authors

  • Heun Mo Yoo

    • Massachusetts Institute of Technology MIT

  • Ken W. West

    • Princeton University
    • Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University
    • Department of Electrical Engineering, Princeton University
    • Electrical Engineering, Princeton
    • Electrical Engineering, Princeton University
    • Princeton

  • Kirk Baldwin

    • Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University
    • Princeton University
    • Department of Electrical Engineering, Princeton University
    • Electrical Engineering, Princeton
    • Electrical Engineering, Princeton University

  • Loren Pfeiffer

    • Princeton University
    • Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University
    • Department of Electrical Engineering, Princeton University
    • Electrical Engineering, Princeton
    • Electrical Engineering, Princeton University
    • Princeton

  • Raymond Ashoori

    • Massachusetts Institute of Technology MIT
    • Physics, Massachusetts Institute of Technology