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000859228 1001_ $$00000-0002-5354-3426$$aDutta, Bivas$$b0
000859228 245__ $$aDirect Probe of the Seebeck Coefficient in a Kondo-Correlated Single-Quantum-Dot Transistor
000859228 260__ $$aWashington, DC$$bACS Publ.$$c2019
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000859228 520__ $$aWe report on the first measurement of the Seebeck coefficient in a tunnel-contacted and gate-tunable individual single-quantum dot junction in the Kondo regime, fabricated using the electromigration technique. This fundamental thermoelectric parameter is obtained by directly monitoring the magnitude of the voltage induced in response to a temperature difference across the junction, while keeping a zero net tunneling current through the device. In contrast to bulk materials and single molecules probed in a scanning tunneling microscopy (STM) configuration, investigating the thermopower in nanoscale electronic transistors benefits from the electric tunability to showcase prominent quantum effects. Here, striking sign changes of the Seebeck coefficient are induced by varying the temperature, depending on the spin configuration in the quantum dot. The comparison with numerical renormalization group (NRG) calculations demonstrates that the tunneling density of states is generically asymmetric around the Fermi level in the leads, both in the cotunneling and Kondo regimes.
000859228 536__ $$0G:(DE-HGF)POF3-142$$a142 - Controlling Spin-Based Phenomena (POF3-142)$$cPOF3-142$$fPOF III$$x0
000859228 536__ $$0G:(DE-Juel1)jiff23_20140501$$aThermoelectric properties of molecular quantum dots and time-dependent response of quantum dots (jiff23_20140501)$$cjiff23_20140501$$fThermoelectric properties of molecular quantum dots and time-dependent response of quantum dots$$x1
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000859228 7001_ $$0P:(DE-HGF)0$$aMajidi, Danial$$b1
000859228 7001_ $$0P:(DE-HGF)0$$aGarcía Corral, Alvaro$$b2
000859228 7001_ $$0P:(DE-HGF)0$$aErdman, Paolo A.$$b3
000859228 7001_ $$0P:(DE-HGF)0$$aFlorens, Serge$$b4
000859228 7001_ $$0P:(DE-Juel1)130600$$aCosti, Theodoulos$$b5$$ufzj
000859228 7001_ $$0P:(DE-HGF)0$$aCourtois, Hervé$$b6
000859228 7001_ $$00000-0003-4320-994X$$aWinkelmann, Clemens B.$$b7$$eCorresponding author
000859228 773__ $$0PERI:(DE-600)2048866-X$$a10.1021/acs.nanolett.8b04398$$gVol. 19, no. 1, p. 506 - 511$$n1$$p506 - 511$$tNano letters$$v19$$x1530-6992$$y2019
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000859228 8564_ $$uhttps://juser.fz-juelich.de/record/859228/files/1811.04219.pdf$$yPublished on 2018-12-19. Available in OpenAccess from 2019-12-19.
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