Manipulating electronic states at oxide interfaces using focused micro   X-rays from standard lab-sources
  Recently, x-ray illumination, using synchrotron radiation, has been used to manipulate defects, stimulate self-organization and to probe their structure. Here we explore a method of defect-engineering low-dimensional systems using focused laboratory-scale X-ray sources. We demonstrate an irreversible change in the conducting properties of the 2-dimensional electron gas at the interface between the complex oxide materials LaAlO3 and SrTiO3 by X-ray irradiation. The electrical resistance is monitored during exposure as the irradiated regions are driven into a high resistance state. Our results suggest attention shall be paid on electronic structure modification in X-ray spectroscopic studies and highlight large-area defect manipulation and direct device patterning as possible new fields of application for focused laboratory X-ray sources. 
Nicola Poccia, Alessandro Ricci, Francesco Coneri, Martin Stehno,   Gaetano Campi, Nicola Demitri, Giorgio Bais, X. Renshaw ...
cond-mat.mtrl-sci cond-mat.str-el