Metal to Insulator Transition in Manganite (IMAGE)

DOE/Lawrence Berkeley National Laboratory

Metal to Insulator Transition in Manganite

Caption

With ARPES data from the Advanced Light Source's beamline 12.0.1, researchers charted electron energy and momentum to plot the band structure of highly doped lanthanum strontium manganese oxide. At 170 degrees Kelvin (154 F) the material switches from a metal to an insulator. Below that temperature, electrons can move freely among disordered insulating fragments. Above that temperature the patches align into coherent stripes. An extra row of highly ionized manganese atoms between the stripes acts as a barrier to electron mobility.

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Lawrence Berkeley National Laboratory

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