TY  - JOUR
AU  - Jaschinsky, P.
AU  - Wensorra, J.
AU  - Lepsa, M. I.
AU  - Myslivecek, J.
AU  - Voigtländer, B.
TI  - Nanoscale charge transport measurements using a double-tip scanning tunneling microscope
JO  - Journal of applied physics
VL  - 104
SN  - 0021-8979
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-4121
SP  - 094307
PY  - 2008
N1  - The authors would like to express their appreciation of the excellent technical assistance of Peter Coenen, Helmut Stollwerk, and the machine shop of IBN. J. M. acknowledges the support of the Ministry of Education of the Czech Republic, Project No. MSM 0021620834. We would like to thank Justin W. Wells for helpful discussions about the Si(111)(7x7) surface.
AB  - We demonstrate the ability of a double-tip scanning tunneling microscope (STM) combined with a scanning electron microscope (SEM) to perform charge transport measurements on the nanoscale. The STM tips serve as electric probes that can be precisely positioned relative to the surface nanostructures using the SEM control and the height reference provided by the tunneling contact. The tips work in contact, noncontact, and tunneling modes. We present vertical transport measurements on nanosized GaAs/AlAs resonant tunneling diodes and lateral transport measurements on the conductive surface of 7 x 7 reconstructed Si(111). The high stability of the double-tip STM allows nondestructive electrical contacts to surfaces via the tunneling gaps. We performed two-point electrical measurements via tunneling contacts on the Si(111) (7x7) surface and evaluated them using a model for the charge transport on this surface. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3006891]
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000260941700103
DO  - DOI:10.1063/1.3006891
UR  - https://juser.fz-juelich.de/record/4121
ER  -