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@ARTICLE{Costi:865782,
      author       = {Costi, T. A.},
      title        = {{M}agnetic field dependence of the thermopower of
                      {K}ondo-correlated quantum dots},
      journal      = {Physical review / B},
      volume       = {100},
      number       = {16},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2019-05090},
      pages        = {161106},
      year         = {2019},
      abstract     = {Recent experiments have measured the signatures of the
                      Kondo effect in the zero-field thermopower of strongly
                      correlated quantum dots [Svilans et al., Phys. Rev. Lett.
                      121, 206801 (2018); Dutta et al., Nano Lett. 19, 506
                      (2019)]. They confirm the predicted Kondo-induced sign
                      change in the thermopower, upon increasing the temperature
                      through a gate-voltage dependent value T1≳TK, where TK is
                      the Kondo temperature. Here, we use the numerical
                      renormalization group (NRG) method to investigate the effect
                      of a finite magnetic field B on the thermopower of such
                      quantum dots. We show that, for fields B exceeding a
                      gate-voltage dependent value B0, an additional sign change
                      takes place in the Kondo regime at a temperature
                      T0(B≥B0)>0 with T0<T1. The field B0 is comparable to, but
                      larger than, the field Bc at which the zero-temperature
                      spectral function splits in a magnetic field. The validity
                      of the NRG results for B0 are checked by comparison with
                      asymptotically exact higher-order Fermi-liquid calculations
                      [Oguri and Hewson, Phys. Rev. B 97, 035435 (2018)]. Our
                      calculations clarify the field-dependent signatures of the
                      Kondo effect in the thermopower of Kondo-correlated quantum
                      dots and explain the recently measured trends in the B-field
                      dependence of the thermoelectric response of such systems},
      cin          = {IAS-3 / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-3-20090406 / $I:(DE-82)080012_20140620$},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) /
                      Application of the (time-dependent) numerical
                      renormalization group approach to thermoelectric properties
                      of (driven) quantum dots and to time-resolved spectroscopy
                      of correlated materials $(jiff23_20181101)$},
      pid          = {G:(DE-HGF)POF3-142 / $G:(DE-Juel1)jiff23_20181101$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000490169800001},
      doi          = {10.1103/PhysRevB.100.161106},
      url          = {https://juser.fz-juelich.de/record/865782},
}