Friedel oscillations of density of states in a one-dimensional Mott insulator and incommensurate charge-density wave or superconductor
A. M. Tsvelik
DOI 10.1103/PhysRevB.77.073402 · Physical Review B
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Abstract
Oscillations of local density of states generated by a single scalar impurity potential are calculated for one-dimensional systems with dynamically generated charge or spin gap. At zero temperature, the oscillations develop at finite wave vector (π for the Mott insulator and 2kF for incommensurate charge-density wave or superconductor) and at frequencies larger than the soliton spectral gap m. Their amplitude has a broad maximum at ω≈3m, where m is the gap magnitude.
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