Photoemission view of electron fractionalization in quasi-one

 dimensional metal Li$_{0.9}$Mo$_6$O$_{17}$

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Abstract

We report Luttinger liquid line shapes better revealed by new angle resolved photoemission data taken with a much improved angle resolution on a quasi-1-dimensional metal Li$_{0.9}$Mo$_6$O$_{17}$. The new data indicate a larger spinon velocity than our previous lower resolution data indicated.

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CORRELATED FERMIONS IN ONE DIMENSION

H.J. SCHULZ (1991)

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Dimensional Crossover in Quasi One-Dimensional and High T_c Superconductors

S A Kivelson, V. J. Emery, D. Orgad … (2000)

The one-dimensional electron gas exhibits spin-charge separation and power-law spectral responses to many experimentally relevant probes. Ordering in a quasi one-dimensional system is necessarily associated with a dimensional crossover, at which sharp quasiparticle peaks, with small spectral weight, emerge from the incoherent background. Using methods of Abelian bosonization, we derive asymptotically correct expressions for the spectral changes induced by this crossover. Comparison is made with experiments on the high temperature superconductors, which are electronically quasi one-dimensional on a local scale.