X-ray-induced persistent photoconductivity in vanadium dioxide
نویسندگان
چکیده
منابع مشابه
X-ray induced persistent photoconductivity in Si-doped Al0.35Ga0.65As
We demonstrate that x-ray irradiation can be used to induce an insulator–metal transition in Si-doped Al0.35Ga0.65As, a semiconductor with DX centers. The excitation mechanism of the DX centers into their shallow donor state was revealed by studying the photoconductance along with fluorescence. The photoconductance as a function of incident x-ray energy exhibits an edge both at the Ga and As K ...
متن کاملPersistent X-ray photoconductivity and percolation of metallic clusters in charge-ordered manganites
– Charge-ordered manganites of composition Pr1−x(Ca1−ySry)xMnO3 exhibit persistent photoconductivity upon exposure to X-rays. This is not always accompanied by a significant increase in the number of conduction electrons as predicted by conventional models of persistent photoconductivity. An analysis of the X-ray diffraction patterns and current-voltage characteristics shows that X-ray illumina...
متن کاملThe Role of Defects in Persistent Photoconductivity in YBa2Cu3O6+x
In the persistent photoconductivity (PPC) phenomena, illumination of a material with light leads to a long-lived photoconductive state. During illumination of oxygen deficient YBCO near the insulator–metal transition, the illuminated material may even become superconducting. Accompanying the large relative changes in resistance are transport and structural changes as well as changes in the phot...
متن کاملLight-Induced Peroxide Formation in ZnO: Origin of Persistent Photoconductivity
The persistent photoconductivity (PPC) in ZnO has been a critical problem in opto-electrical devices employing ZnO such as ultraviolet sensors and thin film transistors for the transparent display. While the metastable state of oxygen vacancy (VO) is widely accepted as the microscopic origin of PPC, recent experiments on the influence of temperature and oxygen environments are at variance with ...
متن کاملPersistent photoconductivity in strontium titanate.
Persistent photoconductivity was observed in strontium titanate (SrTiO(3)) single crystals. When exposed to sub-bandgap light (2.9 eV or higher) at room temperature, the free-electron concentration increases by over 2 orders of magnitude. After the light is turned off, the enhanced conductivity persists for several days, with negligible decay. From positron lifetime measurements, the persistent...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2014
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.90.165109