| Issue |
EPL
Volume 84, Number 5, December 2008
|
|
|---|---|---|
| Article Number | 57005 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/84/57005 | |
| Published online | 16 December 2008 | |
Spin-Charge separation in two dimensions
Università di Roma “Tor Vergata” - Viale della Ricerca Scientifica, 00133 Roma, Italy, EU
Corresponding author: mastropi@axp.mat.uniroma2.it
Received:
5
June
2008
Accepted:
21
October
2008
The presence of Spin-Charge (SC) separation in two dimensions, which according to many is the root cause of the peculiar properties of high-Tc superconductors, is still rather controversial: theoretical results obtained through different methods and approximations apparently provide conflicting results. In this paper we prove that SC separation occurs in two dimensions, provided that the Fermi surface has flat pieces and the range of interaction is finite but large enough. SC separation emerges from the anomalies in the Ward Identities obtained from local phase transformations depending on the Fermi surface side.
PACS: 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 71.10.Fd – Lattice fermion models (Hubbard model, etc.)
© EPLA, 2008
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