Dark states in spin-polarized transport through triple quantum dot molecules
arXiv:1802.02484 · doi:10.1103/PhysRevB.97.075425
Abstract
We study the spin-polarized transport through a triple quantum dot molecule weakly coupled to ferromagnetic leads. The analysis is performed by means of the real-time diagrammatic technique including up to the second order of perturbation expansion with respect to the tunnel coupling. The emphasis is put on the impact of dark states on spin-resolved transport characteristics. It is shown that the interplay of coherent population trapping and cotunneling processes results in a highly nontrivial behavior of the tunnel magnetoresistance, which can take negative values. Moreover, a super-Poissonian shot noise is found in transport regimes where the current is blocked by the formation of dark states, which can be additionally enhanced by spin-dependence of tunneling processes, depending on magnetic configuration of the device. The mechanisms leading to those effects are thoroughly discussed.
References in corpus (50)
- Spintronics: Fundamentals and applications
- Quantum Computation with Quantum Dots
- Spins in few-electron quantum dots
- Shot Noise in Mesoscopic Conductors
- Kondo Physics in a Single Electron Transistor
- Conditional Quantum Dynamics and Logic Gates
- Mesoscopic quantum transport: Resonant tunneling in the presence of strong Coulomb interaction
- Resonant tunneling through ultrasmall quantum dots: zero-bias anomalies, magnetic field dependence, and boson-assisted transport
- Kondo effect in quantum dots coupled to ferromagnetic leads
- Franck-Condon blockade in suspended carbon nanotube quantum dots
- Stability Diagram of a Few-Electron Triple Dot
- Coherent control of three-spin states in a triple quantum dot
- Coherent spin manipulation in an exchange-only qubit
- Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes
- Co-tunneling current and shot noise in quantum dots
- All-electronic coherent population trapping in quantum dots
- Two path transport measurements on a triple quantum dot
- Topological Hunds rules and the electronic properties of a triple lateral quantum dot molecule
- Dark states in the magnetotransport through triple quantum dots
- Charge transport through single molecules, quantum dots, and quantum wires
- Magnetically Tunable Kondo - Aharonov-Bohm Effect in a Triangular Quantum Dot
- Spin effects in single electron tunneling
- Universality of the Kondo effect in quantum dots with ferromagnetic leads
- Three-electron spin qubits
- Bipolar spin blockade and coherent state superpositions in a triple quantum dot
- Charge frustration in a triangular triple quantum dot
- The 3D transport diagram of a triple quantum dot
- Two-Particle Dark State in the Transport through a Triple Quantum Dot
- Pauli spin blockade in weakly coupled quantum dots
- Quantum phase transition in quantum dot trimers
- Kondo effect in triple quantum dots
- Magnetic field tuning and quantum interference in a Cooper pair splitter
- Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
- Long-range spin transfer in triple quantum dots
- All-optical preparation of coherent dark states of a single rare earth ion spin in a crystal
- Kondo effects in a triangular triple quantum dot: NRG study in the whole region of the electron filling
- Spin-dependent thermoelectric effects in a strongly correlated double quantum dot
- Superconducting proximity effect and zero-bias anomaly in transport through quantum dots weakly attached to ferromagnetic leads
- Linear and nonlinear Stark effect in triangular molecule
- SU(3) Kondo effect in spinless triple quantum dots
- Fano stability diagram of a symmetric triple quantum dot
- Long-range Exchange Interaction in Triple Quantum Dots in the Kondo Regime
- Transport properties in a Non-Hermitian triple-quantum-dot structure
- Two-channel Kondo tunneling in triple quantum dot
- Quantum interference in a Cooper pair splitter: The three sites model
- Current cross-correlations in double quantum dot based Cooper pair splitters with ferromagnetic leads
- Spin entangled two-particle dark state in quantum transport through coupled quantum dots
- Read-out and Dynamics of the Qubit Built on Three Quantum Dots
- Interplay between electron pairing and Dicke effect in triple quantum dots structures
- Co-tunneling spin blockade observed in a three-terminal triple quantum dot