Direct visualization of defect density waves in 2D.
A scanning tunneling microscopy investigation of the 1/3 of a monolayer alpha phase of Sn on Si(111) reveals a new low temperature phase, which is electronic and not structural. This phase consists of a one-dimensional incommensurate electronic wave that coincides with a periodic modulation of the population of the substitutional Si defects, i.e., a defect density wave.
Ottaviano
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INFM, Unità dell'Aquila, Italy.
Melechko
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AV
Santucci
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S
Plummer
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EW