Nonlinear response of a two-dimensional electron gas in the quantum Hall regime

Shuichi Iwakiri, Lev V. Ginzburg, Marc P. Röösli, Yigal Meir, Ady Stern, Christian Reichl, Matthias Berl, Werner Wegscheider, Thomas Ihn, Klaus Ensslin

Research output: Contribution to journalArticlepeer-review


Breaking of inversion symmetry leads to nonlinear and nonreciprocal electron transport, in which the voltage response does not invert with the reversal of the current direction. Many systems have incorporated inversion symmetry breaking into their band or crystal structures. In this Letter, we demonstrate that a conventional two-dimensional electron gas system with a back gate shows nonreciprocal behavior (with voltage proportional to current squared) in the quantum Hall regime, which depends on the out-of-plane magnetic field and contact configuration. The inversion symmetry is broken due to the presence of the back gate and magnetic field, and our phenomenological model provides a qualitative explanation of the experimental data. Our results suggest a universal mechanism that gives rise to nonreciprocal behavior in gated samples.

Original languageEnglish
Article numberL032046
JournalPhysical Review Research
Issue number3
StatePublished - 1 Jul 2023

ASJC Scopus subject areas

  • General Physics and Astronomy


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