Probing spin-charge separation in a Tomonaga-Luttinger liquid

Abstract

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. TLL effects should therefore also be important in similar, but shorter, electrostatically gated wires, where interaction effects are being studied extensively worldwide.

11 pages, 4 PDF figures, uses scicite.sty, Science.bst

References in corpus (4)

• Spin-charge separation and localization in one-dimension
• Universal theory of nonlinear Luttinger liquids
• Fermi-Luttinger liquid: Spectral function of interacting one-dimensional fermions
• Probing e-e interactions in a periodic array of GaAs quantum wires

Cited by in corpus (6)

• Spin-charge separation in one-dimensional fermion systems beyond the Luttinger liquid theory
• Tunneling into a Luttinger liquid revisited
• Quantum phase transition in quantum wires controlled by an external gate
• Interference of parametrically driven one-dimensional ultracold gases
• Transient effects in the backscattered current of a Luttinger liquid
• Wigner crystal in snaked nanochannels