2012
DOI: 10.1103/physrevb.85.085117
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Spin thermopower in interacting quantum dots

Abstract: Using analytical arguments and the numerical renormalization group method we investigate the spin-thermopower of a quantum dot in a magnetic field. In the particle-hole symmetric situation the temperature difference applied across the dot drives a pure spin current without accompanying charge current. For temperatures and fields at or above the Kondo temperature, but of the same order of magnitude, the spin-Seebeck coefficient is large, of the order of kB/|e|. Via a mapping, we relate the spin-Seebeck coeffici… Show more

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Cited by 85 publications
(118 citation statements)
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References 52 publications
(57 reference statements)
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“…An accurate description of the spectral and transport properties in the most challenging (nonperturbative) regime of intermediate temperatures and bias voltages T, φ T K has however not been feasible until recently. While the electronic transport has been studied extensively, the thermoelectric transport theory mostly focused on the linear response regime 13,25,[71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89] . The nonlinear regime has been addressed mainly in the weak coupling limit 32,78,[90][91][92][93][94][95][96][97] , a systematic analysis including renormalization effects 66,67,98,99 beyond the perturbative regime is still missing.…”
Section: Introductionmentioning
confidence: 99%
“…An accurate description of the spectral and transport properties in the most challenging (nonperturbative) regime of intermediate temperatures and bias voltages T, φ T K has however not been feasible until recently. While the electronic transport has been studied extensively, the thermoelectric transport theory mostly focused on the linear response regime 13,25,[71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89] . The nonlinear regime has been addressed mainly in the weak coupling limit 32,78,[90][91][92][93][94][95][96][97] , a systematic analysis including renormalization effects 66,67,98,99 beyond the perturbative regime is still missing.…”
Section: Introductionmentioning
confidence: 99%
“…[19]. Two-terminal geometries using mesoscopic conductors have been considered, notably using quantum dots [5,20,21,7,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43]. In the two-terminal geometry, both temperature and voltage bias are applied to the sample and the thermoelectric response is investigated.…”
Section: Introductionmentioning
confidence: 99%
“…Double quantum dots supporting molecular states are believed to display enhanced thermoelectric power [35]. The spin Seebeck coefficient, which measures the spin current generated in response to a thermal gradient, shows interesting features when many-body interactions are taken into account [36][37][38]. It turns out that the thermopower is a reliable probe of correlations in QD systems with SU(4) Kondo symmetry [39].…”
Section: Introductionmentioning
confidence: 99%