Superconductivity of freestanding tungsten nanofeatures grown by focused-ion-beam.
Freestanding tungsten composite nanofeatures were grown by focused-ion-beam-induced deposition with 1 pA ion beam current. The temperature dependent electrical measurements show that the flying nanoscale tungsten is conducting with a room temperature resistivity of 550 micro omega cm. It is also superconducting with a Tc, above 5.1 K and can be repeatedly thermally cycled. Our results suggest that FIB direct-writing of three-dimensional tungsten composites might be a potential approach to fabricate vertical nanodevices and mask-free superconducting devices.
London Centre for Nanotechnology, London WC1H 0AH, United Kingdom.
Wuxia
W
Li
Changzhi
C
Gu
P A
PA
Warburton