2017
DOI: 10.1103/physrevb.96.085416
|View full text |Cite
|
Sign up to set email alerts
|

Fate of the spin- 12 Kondo effect in the presence of temperature gradients

Abstract: We consider a strongly interacting quantum dot connected to two leads held at quite different temperatures. Our aim is to study the behavior of the Kondo effect in the presence of large thermal biases. We use three different approaches, namely, a perturbation formalism based on the Kondo Hamiltonian, a slave-boson mean-field theory for the Anderson model at large charging energies and a truncated equation-of-motion approach beyond the Hartree-Fock approximation. The two former formalisms yield a suppression of… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1

Citation Types

0
13
0

Year Published

2018
2018
2023
2023

Publication Types

Select...
8

Relationship

2
6

Authors

Journals

citations
Cited by 17 publications
(13 citation statements)
references
References 68 publications
(86 reference statements)
0
13
0
Order By: Relevance
“…Remarkably, the conductance of both central peak and positive bias step increase as a function of the temperature gradient while the Kondo temperature measured for the different spectra of Fig. 3 remains constant and equal to T K = 56 ± 3 K. This result is not surprising since is too small to produce any smearing of the Kondo resonance [36].…”
Section: Resultsmentioning
confidence: 91%
“…Remarkably, the conductance of both central peak and positive bias step increase as a function of the temperature gradient while the Kondo temperature measured for the different spectra of Fig. 3 remains constant and equal to T K = 56 ± 3 K. This result is not surprising since is too small to produce any smearing of the Kondo resonance [36].…”
Section: Resultsmentioning
confidence: 91%
“…NCA has being successfully applied to the study of a variety of systems such as two-level QD's and C 60 molecules displaying a quantum phase transition, 26,37,75,76 or a nanoscale Si transistor 29 among others. Few alternatives exist out of equilibrium, like renormalized perturbation theory 53,54,72,77,78 , Fermiliquid approaches 79 and slave bosons, 80,81 which are restricted to small voltage and temperature, equations of motion with some difficulties to reproduce the Kondo energy scale, [82][83][84] or real-time renormalization group. 44,55 Recently, a variational approach has been proposed.…”
Section: Model and Methodsmentioning
confidence: 99%
“…If this condition is violated, as it might be the case in graphene [106][107][108], hybrid systems with one (or both) of the electrodes being a superconductor, e.g., d-wave [109], other approaches are needed. For models with energy dependent couplings one still has to rely on approximate relations between the lesser self-energy Σ < σ (E) and the retarded one, Σ r σ (E), making use of Ng's approximation [60], a generalisation of the fluctuation-dissipation theorem [28,40], or using the equation of motion for the lesser GF [110] and suitable decoupling. For recent attempts including energy-dependent couplings, see the paper [75].…”
Section: Modeling the Device And Calculating Currentsmentioning
confidence: 99%