Possible co-existence of local itinerancy and global localization in a quasi-one-dimensional conductor

Details Possible co-existence of local itinerancy and global localization in a quasi-one-dimensional conductor Possible co-existence of local itinerancy and global localization in a quasi-one-dimensional conductor

2007-09-07

arxiv.org/abs/0709.1115v1

Phys. Rev. Lett. vol. 98, 146601 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 Figures

Scientific paper

10.1103/PhysRevLett.98.146601

In the chain compound PrBa$_2$Cu$_4$O$_8$ localization appears simultaneously with a dimensional crossover in the electronic ground state when the scattering rate in the chains exceeds the hopping rate between the chains. Here we report the discovery of a large, transverse magnetoresistance in PrBa$_2$Cu$_4$O$_8$ in the localized regime. This result suggests a novel form of localization whereby electrons retain their metallic (quasi-one-dimensional) character over a microscopic length scale despite the fact that macroscopically, they exhibit localized (one-dimensional) behavior.

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