Wigner lattice order, collective mode, and superconductivity in the La1.985Sr0.015CuO4+delta system

Authors
Kim, YH Hor, PH
Citation
Yh. Kim et Ph. Hor, Wigner lattice order, collective mode, and superconductivity in the La1.985Sr0.015CuO4+delta system, MOD PHY L B, 15(15), 2001, pp. 497-513
Citations number
54
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MODERN PHYSICS LETTERS B
ISSN journal
02179849 → ACNP
Volume
15
Issue
15
Year of publication
2001
Pages
497 - 513
Database
ISI
SICI code
0217-9849(20010630)15:15<497:WLOCMA>2.0.ZU;2-V
Abstract
We have studied far-infrared charge dynamics of Sr- and O- co-doped La1.985 Sr0.015CuO4+delta with delta = 0.024 (p = 0.063 per Cu) and delta = 0.032 ( p = 0.07). We found that two-dimensional Wigner lattice order is the ground state of cuprates away from half-filling. We found that the presence of 2D Wigner lattice and the pinned Goldstone mode is essential for cuprate phys ics and superconductivity. We propose that all high T-c physics are based o n the existence of these peculiar 2D electron lattices.