Anomalous noise in the pseudogap regime of YBa2Cu3O(7-delta).
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.
Caplan
D S
DS
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Orlyanchik
V
V
Weissman
M B
MB
Van Harlingen
D J
DJ
Fradkin
E H
EH
Hinton
M J
MJ
Lemberger
T R
TR