@book{noauthor_disorder_2018,
	title = {Disorder raises the critical temperature of a cuprate superconductor},
	url = {http://arxiv.org/abs/1808.05984},
	abstract = {With the discovery of charge density waves (CDW) in most members of the cuprate high temperature superconductors, the interplay between superconductivity and CDW has become a key point in the debate on the origin of high temperature superconductivity. Some experiments in cuprates point toward a CDW state competing with superconductivity, but others raise the possibility of a CDW-superconductivity intertwined order, or more elusive pair-density wave (PDW). Here we have used proton irradiation to induce disorder in crystals of La\$\_1.875\$Ba\$\_0.125\$CuO\$\_4\$ and observed a striking 50\% increase of \$T\_{\textbackslash}mathrmc\$ accompanied by a suppression of the CDW. This is in clear contradiction with the behaviour expected of a d-wave superconductor for which both magnetic and non-magnetic defects should suppress \$T\_{\textbackslash}mathrmc\$. Our results thus make an unambiguous case for the strong detrimental effect of the CDW on bulk superconductivity in La\$\_1.875\$Ba\$\_0.125\$CuO\$\_4\$. Using tunnel diode oscillator (TDO) measurements, we find evidence for dynamic layer decoupling in PDW phase. Our results establish irradiation-induced disorder as a particularly relevant tuning parameter for the many families of superconductors with coexisting density waves, which we demonstrate on superconductors such as the dichalcogenides and Lu\$\_5\$Ir\$\_4\$Si\$\_10\$.},
	year = {2018},
	keywords = {disorder, intertwined}
}

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