PIRSA:15120025

Long-range order and pinning of charge-density waves in competition with superconductivity

Wachtel, G. (2015). Long-range order and pinning of charge-density waves in competition with superconductivity. Perimeter Institute. https://pirsa.org/15120025

Wachtel, Gideon. Long-range order and pinning of charge-density waves in competition with superconductivity. Perimeter Institute, Dec. 01, 2015, https://pirsa.org/15120025 

          @misc{ pirsa_PIRSA:15120025,
            doi = {10.48660/15120025},
            url = {https://pirsa.org/15120025},
            author = {Wachtel, Gideon},
            keywords = {Condensed Matter},
            language = {en},
            title = {Long-range order and pinning of charge-density waves in competition with superconductivity},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {dec},
            note = {PIRSA:15120025 see, \url{https://pirsa.org}}
          }

Gideon Wachtel University of Toronto - Department of Physics

Talk numberPIRSA:15120025
DOI10.48660/15120025
Collection
Talk Type Scientific Series
Subject

Abstract

Recent experiments show that charge-density wave correlations are prevalent in underdoped cuprate superconductors. The correlations are short-ranged at weak magnetic fields but their intensity and spatial extent increase rapidly at low temperatures beyond a crossover field. Here we consider the possibility of long-range charge-density wave order in a model of a layered system where such order competes with superconductivity. We show that in the clean limit, low-temperature long-range order is stabilized by arbitrarily weak magnetic fields. This apparent discrepancy with the experiments is resolved by the presence of disorder. Like the field, disorder nucleates halos of charge-density wave, but unlike the former it also disrupts inter-halo coherence, leading to a correlation length that is always finite. Our results are compatible with various experimental trends, including the onset of longer range correlations induced by inter-layer coupling above a characteristic field scale.