Nonlinear spectra of spinons and holons in short GaAs quantum wires

Abstract

One-dimensional electronic fluids are peculiar conducting systems, where the fundamental role of interactions leads to exotic, emergent phenomena, such as spin-charge (spinon-holon) separation. The distinct low-energy properties of these 1D metals are successfully described within the theory of linear Luttinger liquids, but the challenging task of describing their high-energy nonlinear properties has long remained elusive. Recently, novel theoretical approaches accounting for nonlinearity have been developed, yet the rich phenomenology that they predict remains barely explored experimentally. Here, we probe the nonlinear spectral characteristics of short GaAs quantum wires by tunnelling spectroscopy, using an advanced device consisting of 6000 wires. We find evidence for the existence of an inverted (spinon) shadow band in the main region of the particle sector, one of the central predictions of the new nonlinear theories. A (holon) band with reduced effective mass is clearly visible in the particle sector at high energies.

8 pages, 6 figures; definitive published version

References in corpus (13)

• Spin-charge separation and localization in one-dimension
• Universal theory of nonlinear Luttinger liquids
• Probing spin-charge separation in a Tomonaga-Luttinger liquid
• Dynamic response of one-dimensional interacting fermions
• Phenomenology of One-Dimensional Quantum Liquids Beyond the Low-Energy Limit
• 1D-1D Coulomb Drag Signature of a Luttinger Liquid
• Measurements of the density-dependent many-body electron mass in 2D GaAs/AlGaAs Heterostructures
• Spin-charge separation in one-dimensional fermion systems beyond the Luttinger liquid theory
• Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems
• Nonlinear spectra of spinons and holons in short GaAs quantum wires
• Hierarchy of modes in an interacting system
• Nature of the many-body excitations in a quantum wire: theory and experiment
• Spectral edge mode in interacting one-dimensional systems

Cited by in corpus (13)

• Magnon damping in the zigzag phase of the Kitaev-Heisenberg-$\Gamma$ model on a honeycomb lattice
• Edge singularities and quasi-long-range order in non-equilibrium steady states
• Momentum-dependent power law measured in an interacting quantum wire beyond the Luttinger limit
• Nonlinear spectra of spinons and holons in short GaAs quantum wires
• Observing separate spin and charge Fermi seas in a strongly correlated one-dimensional conductor
• Microscopic metallic air-bridge arrays for connecting quantum devices
• Platforms for the realization and characterization of Tomonaga-Luttinger liquids
• Splitting of Fermi point of strongly interacting electrons in one dimension: A nonlinear effect of spin-charge separation
• Many-body theory of magneto-elasticity in one dimension
• Semiconductor nanodevices as a probe of strong electron correlations
• Decoupling of the many-body effects from the electron mass in GaAs by means of reduced dimensionality
• Heat capacity of anisotropic Heisenberg antiferromagnet within the spin Hartree-Fock approach in quasi-1D Regime
• Dominant end-tunneling effect in two distinct Luttinger liquids coexisting in one quantum wire