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Probing spin-charge separation in a Tomonaga-Luttinger liquid · Around

2010

Probing spin-charge separation in a Tomonaga-Luttinger liquid

Jompol, Y., Ford, C. J. B., Griffiths, J. P. et al.

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In a one-dimensional (1D) system of interacting electrons, excitations of spin and charge travel at different speeds, according to the theory of a Tomonaga-Luttinger Liquid (TLL) at low energies.

However, the clear observation of this spin-charge separation is an ongoing challenge experimentally.
We have fabricated an electrostatically-gated 1D system in which we observe spin-charge separation and also the predicted power-law suppression of tunnelling into the 1D system.
The spin-charge separation persists even beyond the low-energy regime where the TLL approximation should hold.

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Materials and methods are detailed in the supporting material on Science

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