  Disorder-induced magnetoresistance has been reported in a range of solid
metals and semiconductors, however, the underlying physical mechanism is still
under debate because it is difficult to experimentally control. Liquid metals,
due to lack of long-range order, offers an ideal model system where many forms
of disorder can be deactivated by freezing the liquid. Here we report
non-saturating magnetoresistance discovered in the liquid state of three
metals: Ga, Ga-In-Sn and Bi-Pb-Sn-In alloys. The giant magnetoresistance
appears above the respective melting points and has a maximum of 2500% at 14
Tesla. The reduced diamagnetism in the liquid state implies that a short-mean
free path of the electron, induced by the spatial distribution of the liquid
structure, is a key factor. A potential technological merit of this
liquidtronic magnetoresistance is that it naturally operates at higher
temperatures.
