Fabrication of nanoscale charge density wave systems

Inagaki, Katsuhiko; Toshima, Takeshi; Tanda, Satoshi; Yamaya, Kazuhiko; Uji, Shinya
February 2005
Applied Physics Letters;2/14/2005, Vol. 86 Issue 7, p073101
Academic Journal
Nanoscale charge density wave systems of quasi-one-dimensional o-TaS3 crystals were fabricated. Gold electrodes 400 nm wide were made by standard lift-off technique on o-TaS3 nanocrystals prepared by deposition on silicon substrates. Interface resistance was higher than 100 GΩ just after evaporation, and were significantly reduced by electron-beam irradiation. The electrodes were tested down to 80 mK, and were found quite durable for cryogenic measurement. The temperature dependence of the resistance of the nanocrystal was represented as the variable-range-hopping-type conduction with one dimension over the wide range of temperature, from 4.2 to 100 K. This behavior was different from that of conventional bulk samples.


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