Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 80: Transport: Molecular Electronics (joint session with TT, CPP, HL, MA, O)

CPP 80.2: Vortrag

Freitag, 20. März 2015, 09:45–10:00, H 0110

Conductance and thermopower of C82 and endohedral metallofullerene molecular junctions with Au electrodes — •Marius Buerkle1, See Kei Lee2, Ryo Yamada2, Hirokazu Tada2, and Yoshihiro Asai11AIST, NRI, Tsukuba, Japan — 2Graduate School of Engineering Science, Osaka University, Japan

By combining STM based conductance and thermopower measurements with first-principle transport calculations we investigate the thermoelectric properties of single C82 molecules, and its endohedral metallofullerene (EMF) derivatives Gd@C82 and Ce@C82 bridging Au electrodes. All three molecular junctions show a comparable conductance of around 0.2 G0 and a negative thermopower indicating electron-like transport through the lowest unoccupied molecular orbital (LUMO). However, for the EMF junctions a much larger thermopower is observed which we can relate to changes in the electronic structure induced by the lanthanide atoms.

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