Wiedemann-Franz law in a non-Fermi liquid and Majorana central charge: Thermoelectric transport in a two-channel Kondo system
arXiv:1912.04919 · doi:10.1103/PhysRevB.102.041111
Abstract
Quantum dot devices allow one to access the critical point of the two-channel Kondo model. The effective critical theory involves a free Majorana fermion quasiparticle localized on the dot. As a consequence, this critical point shows both the phenomenon of non-Fermi liquid physics and fractionalization. Although a violation of the Wiedemann-Franz law is considered a defining feature of non-Fermi liquid systems, we show by exact calculations that it holds at the critical point, providing a counterexample to this lore. Furthermore, we show that the fractionalized Majorana character of the critical point can be unambiguously detected from the heat conductivity, opening the door to a direct experimental measurement of the elusive Majorana central charge .
arXiv comment18 pages, 3 figures
References in corpus (38)
- Kondo Physics in a Single Electron Transistor
- A Tunable Kondo Effect in Quantum Dots
- The numerical renormalization group method for quantum impurity systems
- Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
- Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
- Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
- Observation of the two-channel Kondo effect
- Coulomb blockade at almost perfect transmission
- Kondo effect in quantum dots
- Thermopower of a Kondo-correlated quantum dot
- Thermoelectric transport through strongly correlated quantum dots
- Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
- Energy flow in non-equilibrium conformal field theory
- Two-channel Kondo effect and renormalization flow with macroscopic quantum charge states
- Theory of strong inelastic co-tunneling
- Non-Fermi liquids and the Wiedemann-Franz law
- Tunable Quantum Criticality and Super-ballistic Transport in a `Charge' Kondo Circuit
- Universal Fermi liquid crossover and quantum criticality in a mesoscopic device
- Wiedemann-Franz law and Fermi liquids
- Quantum phase transition in a two-channel-Kondo quantum dot device
- Thermal Conductance of a Single-Electron Transistor
- On the Emery-Kivelson Solution of the two channel Kondo problem
- Generalized Wilson Chain for solving multichannel quantum impurity problems
- Universal low-temperature crossover in two-channel Kondo models
- Large violation of Wiedemann Franz law in Luttinger liquids
- Exact crossover Green function in the two-channel and two-impurity Kondo models
- Kondo blockade due to quantum interference in single-molecule junctions
- Conductance fingerprint of Majorana fermions in the topological Kondo effect
- Anyons in Multichannel Kondo Systems
- Interleaved numerical renormalization group as an efficient multiband impurity solver
- Universality and scaling in a charge two-channel Kondo device
- Wilson chains are not thermal reservoirs
- Charge Fractionalization in a Kondo Device
- Thermoelectric Transport in a Three-Channel Charge Kondo Circuit
- Seebeck effect on a weak link between Fermi and non-Fermi liquids
- Spin thermopower in the overscreened Kondo model
- Transport Signatures of Majorana Quantum Criticality Realized by Dissipative Resonant Tunneling
- Quantum Criticality in Resonant Andreev Conduction
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- Fractional entropy of multichannel Kondo systems from conductance-charge relations
- Violation of the Wiedemann-Franz law in the Topological Kondo model
- Thermoelectric Transport in a Three-Channel Charge Kondo Circuit
- SO(5) non-Fermi liquid in a Coulomb box device
- Manipulating Non-Abelian Anyons in a Chiral Multichannel Kondo Model
- Generalized Wiedemann-Franz law in a two-site charge Kondo circuit: Lorenz ratio as a manifestation of the orthogonality catastrophe
- Coulomb blockade oscillations of heat conductance in the charge Kondo regime
- Quantum thermoelectric and heat transport in the overscreened Kondo regime: Exact conformal field theory results
- Wiedemann-Franz law in scattering theory revisited
- SO(5) critical point in a spin-flavor Kondo device -- Bosonization and refermionization solution
- Thermoelectric transport across a tunnel contact between two charge Kondo circuits: beyond perturbation theory
- Chiral numerical renormalization group
- Electric and heat transport in a charge two-channel Kondo device
- Universal relations between thermoelectrics and noise in mesoscopic transport across a tunnel junction
- Noise signatures of a charged Sachdev-Ye-Kitaev dot in mesoscopic transport