Self-Organized Electronic Extended van Hove Singularity as Lattice Dynamic Confinement Effect.

A mechanism of self-consistently induced one-dimensional singularities of electronic density of states (DOS) in cuprates is proposed. It is found that unidirectional dynamic confinement of electrons motion by quantum lattice vibrations (presumably, by B buckling mode) may cause transition into ordered electronic state possessing extended 'van Hove singularities' of Floquet modes. This finding may explain observed enhancement of the ordering instability in the anti-nodal regions of the 'Fermi surface' in the under- and optimally doped high- T cuprates. Also predicted is a destruction of the dynamic electron-lattice confinement effect in strong enough magnetic field that simultaneously maintains the electronic order. [ABSTRACT FROM AUTHOR]