Spin-charge separation: From one hole to finite doping

Details Spin-charge separation: From one hole to finite doping Spin-charge separation: From one hole to finite doping

2001-01-26

arxiv.org/abs/cond-mat/0101411v1

Physica C341-348, 863 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, presented in M2S-HTSC-VI conference (2000)

Scientific paper

In the presence of nonlocal phase shift effects, a quasiparticle can remain topologically stable even in a spin-charge separation state due to the confinement effect introduced by the phase shifts at finite doping. True deconfinement only happens in the zero-doping limit where a bare hole can lose its integrity and decay into holon and spinon elementary excitations. The Fermi surface structure is completely different in these two cases, from a large band-structure-like one to four Fermi points in one-hole case, and we argue that the so-called underdoped regime actually corresponds to a situation in between.

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