Switchable zero-bias anomaly in individual C₆₀ molecules contacted with tunable aluminum electrodes

Switchable zero-bias anomaly in individual C₆₀ molecules contacted with tunable aluminum electrodes

Scheer, E. ; Böhler, T. ; Edtbauer, A. ; Egle, S. ; Erbe, A. ; Pietsch, T.

Тема: К 75-летию со дня рождения И. К. Янсона

Інший ID: PACS: 73.63.–b, 73.23.–b, 74.70.Wz, 85.65.+h

URI: http://dspace.nbuv.gov.ua/handle/123456789/118226

Посилання: Switchable zero-bias anomaly in individual C₆₀ molecules contacted with tunable aluminum electrodes / E. Scheer, T. Böhler, A. Edtbauer, S. Egle, A. Erbe, T. Pietsch // Физика низких температур. — 2013. — Т. 39, № 3. — С. 335–342. — Бібліогр.: 39 назв. — англ.

Підтримка: We thank J.J. Palacios and N. Andrei for helpful discussions. Financial support by the Deutsche Forschungsgemeinschaft through SFB513, SFB767, SPP1243 and the Krupp foundation through the Alfried-Krupp-Förderpreis für Junge Hochschullehrer is gratefully acknowledged.

Дата: 2013

Завантажень: 314

Switchable zero-bias anomaly in individual C₆₀ molecules contacted with tunable aluminum electrodes

Анотація:

We report the observation of strong resonances at zero bias in the differential conductance through Al–C₆₀–Al junctions with tunable electrode distance, measured above T = 10 K. The conductance value at resonance ranges from a few percent up to eighty percent of the quantum of conductance. The resonances may disappear or reoccur completely and discontinuously upon very small changes of the electrode distance. However, once they are formed they are very robust with respect to changes of the electrode distance. We discuss similarities and differences to the common theories of the Kondo screening of a spontaneous spin polarization of the C₆₀ molecule. We deduce Kondo temperatures in the range from 35 to 160 K and demonstrate that the temperature dependence is in agreement with the scaling behavior of the Kondo effect in the temperature range of our experiment.

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