Hayward, Lauren E.Achkar, Andrew J.Hawthorn, David G.Melko, Roger G.Sachdev, Subir2015-06-152014Hayward, Lauren E., Andrew J. Achkar, David G. Hawthorn, Roger G. Melko, and Subir Sachdev. 2014. “ Diamagnetism and Density-Wave Order in the Pseudogap Regime of YBa 2 Cu 3 O 6 + x .” Phys. Rev. B 90 (9) (September). doi:10.1103/physrevb.90.094515.1098-0121http://nrs.harvard.edu/urn-3:HUL.InstRepos:16380263Clear experimental evidence of charge density-wave correlations competing with superconducting order in YBCO have thrust their relationship with the pseudogap regime into the spotlight. To aid in characterizing the pseudogap regime, we propose a dimensionless ratio of the diamagnetic susceptibility to the correlation length of the charge density-wave correlations. Using Monte Carlo simulations, we compute this ratio on the classical model of Hayward et al. [Science 343, 1336 (2014)], which describes angular fluctuations of a multicomponent order, capturing both superconducting and density-wave correlations. We compare our results with available data on YBa2Cu3O6+x, and propose experiments to clarify the value of this dimensionless ratio using existing samples and techniques.en-USJournal Article2015-06-1510.1103/PhysRevB.90.094515