Interacting one-dimensional electrons

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• Sanjeev Kumar, UCL
• Friday 17 June 2022, 14:00-15:00
• https://bham-ac-uk.zoom.us/j/87537747290?pwd=QkFrMStXS2UycTg0NGtxUnpBOHRWUT09.

If you have a question about this talk, please contact Mingee Chung.

In this presentation, I will show experimental results of quantum transport in one-dimensional (1D) quantum wire realised using GaAs/AlGaAs heterostructure by squeezing the two-dimensional electron gas using a pair of split gates and a top gate. Lowering confinement potential and reducing carrier concentration lead to the disappearance of the first plateau at 2e^{2/h, thus, the new ground state is at 4e}2/h, indicating a row of electrons bifurcating into two, which was confirmed with transverse electron focusing. This is the formation of the Incipient Wigner Lattice, which is expected to provide rich spin and charge phases. I will conclude by showing recent experimental results in the low-density regime or the Wigner regime, showing the emergence of non-magnetic fractional conductance plateaus (in units of e^2/h) at values of 1/6, 2/5, 1/5, etc.

Kumar et al Physical Review Letters 122 (8), 086803, 2019 Kumar et al, Applied Physics Letters 115 (12), 123104, 2019 Ho et al, Physical Review Letters 121, 106801, 2018

This talk is part of the Condensed Matter Physics Seminars series.

This talk is included in these lists:

• Bham Talks
• Cond. Mat. seminar
• Condensed Matter Physics Seminars
• What's on in Physics?
• https://bham-ac-uk.zoom.us/j/87537747290?pwd=QkFrMStXS2UycTg0NGtxUnpBOHRWUT09

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