1999/10/12 by S. Mazumdar, R. T. Clay, R. Torsten Clay +5
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Organic and Molecular Conductors Research #Quantum and electron transport phenomena #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9910164
5 pages, 3 eps figures
arxiv created 1999/10/12 · openalex publication_date 1999/10/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Two-dimensional (2D) strongly correlated electron systems underlie many of the most important phenomena in contemporary condensed matter physics, including the Quantum Hall Effect (QHE), ``high Tc'' superconductivity, and possible exotic conducting states in silicon MOSFETs. We demonstrate the existence of yet another exotic ground state in strongly correlated, 2D electronic materials: a novel, insulating bond-order/charge density wave state (BCDW) in the commensurate 1/4-filled band that persists for all anisotropies within the 2D lattice, in contradiction to the non-interacting electron prediction of the vanishing of density waves in 2D for non-1/2-filled bands. The persistence of the BCDW in the 2D lattice is a consequence of strong electron-electron (e-e) interaction and the resultant ``confinement,'' a concept recently widely debated. Our results have implications for experiments in the organic charge transfer solids (CTS), where they explain the observation of a ``mysterious'' coexistence of density waves, clarify the optical conductivity of the ``metallic'', and suggest an approach to the observed organic superconductivity.