A novel fresh surface preparation technique: in-situ solid phase crystallization and its application to STM

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NbO_2 thin films were crystallized from amorphous films fabricated on glass substrates by pulsed laser deposition using various oxidative state targets. Weakly (110 oriented films can be grown in a limited condition, which is dependent on target oxidation condition. Functional materials such as Ta:SnO_2 and W:SnO_2 with improved properties were grown on (110) NbO_2 thin films. The surface of as-deposited amorphous films were probed by STM/STS. A irregular shape without atomic resolution, which suggest the existence of absorbed air were observed. An atomic resolution image is expected to be observed after in-situ solid state crystallization in STM chamber.