Room-Temperature Pauli Spin Blockade and Current Rectification in 15-13-15 Armchair Graphene Nanoribbon Heterostructures
arXiv:2505.01662 · doi:10.1039/d5nr02677f
Abstract
In this study, we investigate the electronic structures of 13-11-13 and 15-13-15 armchair graphene nanoribbon (AGNR) superlattices (SLs) using a tight-binding model. We demonstrate that the conduction and valence subbands of 15-13-15 AGNR SLs can be accurately described by the Su-Schrieffer-Heeger model, with topologically protected interface states emerging at the junctions between 15-AGNR and 13-AGNR segments. These interface states enable the formation of quantum dot arrays with energy levels well separated from bulk states, making them promising candidates for high-temperature solid-state quantum processors. For 15-13-15 AGNRH segments, we observe both localized zigzag edge states and topologically protected interface states under longitudinal electric fields, with the latter providing efficient tunneling channels in contrast to the less conductive edge states. We further explore nonlinear charge transport through these interface states under Pauli spin blockade, showing that tunneling current spectra reveal charge stability diagrams and Coulomb blockade oscillations, consistent with experimental findings in other serial double quantum dot systems. Additionally, we examine the impact of orbital offsets on tunneling current rectification and demonstrate that significant current rectification is achieved over a wide temperature range when level broadening is optimized. These results highlight the potential of 15-13-15 AGNRHs for robust spin-current conversion and applications in quantum devices, offering advantages over other proposed structures due to precise tunability of key parameters via bottom-up synthesis techniques and the ease of two-gate electrode integration.
16 pages and 13 Figures
References in corpus (50)
- Electric Field Effect in Atomically Thin Carbon Films
- Quantum Computation with Quantum Dots
- Electronic transport in two dimensional graphene
- Quantum state engineering with Josephson-junction devices
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- Electron transport through double quantum dots
- Driven coherent oscillations of a single electron spin in a quantum dot
- Quantum computation with trapped polar molecules
- Electronic and Magnetic Properties of Nanographite Ribbons
- Electron-Electron Interactions in Graphene: Current Status and Perspectives
- Spin qubits in graphene quantum dots
- Exponential Protection of Zero Modes in Majorana Islands
- Topological Band Engineering of Graphene Nanoribbons
- Engineering of robust topological quantum phases in graphene nanoribbons
- Quantum CNOT Gate for Spins in Silicon
- Topological phases in the non-Hermitian Su-Schrieffer-Heeger model
- Short-Channel Field Effect Transistors with 9-Atom and 13-Atom wide Graphene Nanoribbons
- Graphene nanoribbons for quantum electronics
- Relaxation, dephasing, and quantum control of electron spins in double quantum dots
- Giant edge state splitting at atomically precise zigzag edges
- Quantum Computers, Factoring, and Decoherence
- Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot
- Width-Dependent Band Gap in Armchair Graphene Nanoribbons Reveals Fermi Level Pinning on Au(111)
- Out-of-equilibrium Kondo effect in Double Quantum Dots
- Inducing Metallicity in Graphene Nanoribbons via Zero-Mode Superlattices
- Dimensional Crossover of Topological Edge States in Su-Schrieffer-Heeger Model
- Pauli Spin Blockade in the Presence of Strong Spin-Orbit Coupling
- Electron spin resonance and spin-valley physics in a silicon double quantum dot
- Coupled quantum dots in bilayer graphene
- Probing relaxation times in graphene quantum dots
- Pauli spin blockade in undoped Si/SiGe two-electron double quantum dots
- A Generic Model for Current Collapse in Spin Blockaded Transport
- Pauli spin blockade in weakly coupled quantum dots
- Coulomb blockade in an atomically thin quantum dot coupled to a tunable Fermi reservoir
- CT invariant quantum spin Hall effect in a ferromagnetic graphene
- Hubbard model description of silicon spin qubits: charge stability diagram and tunnel coupling in Si double quantum dots
- Nanoscale spin rectifiers controlled by the Stark effect
- Hyperfine-induced valley mixing and the spin-valley blockade in carbon-based quantum dots
- Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots
- Magnetic Correlations in Short and Narrow Graphene Armchair Nanoribbons
- Quantum theory of the charge stability diagram of semiconductor double quantum dot systems
- Theory of spin blockade, charge ratchet effect, and thermoelectrical behavior in serially coupled quantum-dot system
- Footprints of hyperfine, spin-orbit, and decoherence effects in Pauli spin blockade
- Single-electron Spin Resonance in a Quadruple Quantum Dot
- Theoretical Studies of Graphene Nanoribbon Quantum Dot Qubits
- One-dimensional magnetic conduction channels across zigzag graphene nanoribbon/hexagonal boron nitride heterojunctions
- Dirac half-semimetallicity and antiferromagnetism in graphene nanoribbon/hexagonal boron nitride heterojunctions
- Tunable Fano-Kondo resonance in side-coupled double quantum dot system
- Singlet-triplet-state readout in silicon-metal-oxide-semiconductor double quantum dots
- Thermally assisted Pauli spin blockade in double quantum dots