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Many-Body Excitations in One-Dimensional Electron Systems (SP Workshop)

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It has been predicted by Tomonaga-Luttinger liquid model, or simply Luttinger liquid model, that spin and charge waves of one-dimensional electron systems could travel at different speeds. Such phenomenon could be observed from the tunnelling process of electrons from one-dimensional wire to two-dimensional electron system.

This talk will discuss the experiments carried out for the measurements of momentum-resolved tunnelling of electrons from one dimensional electron systems to two-dimensional electron systems induced within GaAs heterostructures. Well-resolved spin-charge separation at low energy and parabolic dispersion of the first-level mode at higher energies, along with structure which resembles second-level excitations (which fades away rapidly at high momentum), were observed.

References:

[1] Tsyplyatyev O., Schofield A. J., Jin Y., Moreno M., Tan W. K., Anirban A. S., Ford C. J. B., Griffiths J. P., Farrer I., Jones G. A. C. and Ritchie D. A., 2016, Phys. Rev. B, 93, 075147. [2] Tsyplyatyev O., Schofield A. J., Jin Y., Moreno M., Tan W. K., Ford C. J. B., Griffiths J. P., Farrer I., Jones G. A. C. and Ritchie D. A., 2015, Phys. Rev. Lett., 114, 196401.

This talk is part of the Semiconductor Physics Group Seminars series.

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