| Issue |
EPL
Volume 86, Number 5, June 2009
|
|
|---|---|---|
| Article Number | 57006 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/86/57006 | |
| Published online | 24 June 2009 | |
Is spin-charge separation observable in a transport experiment?
1
Institut für Theorie der Kondensierten Materie, Universität Karlsruhe - 76128 Karlsruhe, Germany, EU
2
Institut für Nanotechnologie, Forschungszentrum Karlsruhe - 76021 Karlsruhe, Germany, EU
Corresponding author: ulbricht@tkm.uni-karlsruhe.de
Received:
9
March
2009
Accepted:
28
May
2009
We consider a one-dimensional chain consisting of an interacting area coupled to non-interacting leads. Within the area, interaction is mediated by a local on-site repulsion. Using real-time evolution within the density matrix renormalisation group (DMRG) scheme, we study the dynamics of wave packets in this two-terminal transport setup. In contrast to previous works, where excitations were created by adding potentials to the Hamiltonian, we explicitly create left-moving single-particle excitations in the right lead as the starting condition. Our simulations show that such a transport setup allows for a clear detection of spin-charge separation using time-resolved spin-polarised density measurements.
PACS: 71.10.Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) / 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors)
© EPLA, 2009
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