Anomalous Noise in the Pseudogap Regime of YBa$_2$Cu$_3$O$_{7-\delta}$

Authors :: Caplan, D. S.
Orlyanchik, V.
Weissman, M. B.
Van Harlingen, D. J.
Fradkin, E. H.
Hinton, M. J.
Lemberger, T. R.
Source :: Phys. Rev. Lett. 104, 177001 (2010)
Publication Year :: 2010
Abstract: An unusual noise component is found near and below about 250 K in the normal state of underdoped YBCO and Ca-YBCO films. This noise regime, unlike the more typical noise above 250 K, has features expected for a symmetry-breaking collective electronic state. These include large individual fluctuators, a magnetic sensitivity, and aging effects. A possible interpretation in terms of fluctuating charge nematic order is presented.<br />Comment: 4 pages, 4 figures