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HL: Fachverband Halbleiterphysik
HL 104: Transport: Molecular electronics (TT with CPP/HL/MA/O)
HL 104.2: Talk
Friday, March 20, 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 Asai1 — 1AIST, 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.