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The so-called stripe phase of the manganites is an important example of thecomplex behaviour of metal oxides, and has long been interpreted as thelocalisation of charge at atomic sites. Here, we demonstrate via resistancemeasurements on La_{0.50}Ca_{0.50}MnO_3 that this state is in fact aprototypical charge density wave (CDW) which undergoes collective transport.Dramatic resistance hysteresis effects and broadband noise properties areobserved, both of which are typical of sliding CDW systems. Moreover, the highlevels of disorder typical of manganites result in behaviour similar to that ofwell-known disordered CDW materials. Our discovery that the manganitesuperstructure is a CDW shows that unusual transport and structural propertiesdo not require exotic physics, but can emerge when a well-understood phase (theCDW) coexists with disorder.

Sliding charge density wave in manganites