Dresden 2006 – scientific programme

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O: Oberflächenphysik

O 26: Particles and clusters I

O 26.9: Talk

Tuesday, March 28, 2006, 17:45–18:00, WIL A317

Negative differential resistance and nonclassical capacitive behavior in networks of metal clusters — •Huijing Zhang, Dirk Mautes, and Uwe Hartmann — Institute of Experimental Physics, University of Saarbrücken, P. O. Box 151150, D-66041 Saarbrücken

Monolayers of small metal clusters of type Au55[P(C6H5)3]12Cl6 were investigated with a low-temperature ultrahigh vacuum scanning tunneling microscope. Apart from the usual charge-quantization phenomena, such as Coulomb blockade and staircase, negative differential resistance was observed by performing measurements at distinct locations on the cluster layers. The latter phenomenon can be understood from a No-dqgateNo-dq effect caused by neighboring clusters and involving a nonclassical behavior of the capacitances generated by the nanoscale metal particles.