Quantum phase transition in a realistic double-quantum-dot system
نویسندگان
چکیده
منابع مشابه
Quantum phase transition in quantum dot trimers
We investigate a system of three tunnel-coupled semiconductor quantum dots in a triangular geometry, one of which is connected to a metallic lead, in the regime where each dot is essentially singly occupied. Both ferromagnetic and antiferromagnetic spin2 Kondo regimes, separated by a quantum phase transition, are shown to arise on tuning the interdot tunnel couplings and should be accessible ex...
متن کاملQuantum phase transition in a multilevel dot.
We discuss electronic transport through a lateral quantum dot close to the singlet-triplet degeneracy in the case of a single conduction channel per lead. By applying the numerical renormalization group, we obtain rigorous results for the linear conductance and the density of states. A new quantum phase transition of the Kosterlitz-Thouless-type is found, with an exponentially small energy scal...
متن کاملDissipative quantum phase transition in a quantum dot
László Borda, Gergely Zaránd, and D. Goldhaber-Gordon 1 Department of Theoretical Physics and Research Group “Theory of Condensed Matter” of the Hungarian Academy of Sciences,Budapest University of Technology and Economics,Budafoki út 8. H-1521 Hungary 2 Institut für Theoretische Festkörperphysik,Universität Karlsruhe,76128 Karlsruhe, Germany 3 Physics Department and Geballe Laboratory for Adva...
متن کاملQuantum current modeling in nano-transistors with a quantum dot
Carbon quantum dots (CQDs) serve as a new class of ‘zero dimensional’ nanomaterial’s in thecarbon class with sizes below 10 nm. As light emitting nanocrystals, QDs are assembled from semiconductormaterials, from the elements in the periodic groups of II-VI, III-V or IV-VI, mainly thanks to impacts of quantum confinement QDs have unique optical properties such as brighter, highly pho...
متن کاملQuantum phase transition and emergent symmetry in a quadruple quantum dot system.
We propose a system of four quantum dots designed to study the competition between three types of interactions: Heisenberg, Kondo, and Ising. We find a rich phase diagram containing two sharp features: a quantum phase transition (QPT) between charge-ordered and charge-liquid phases and a dramatic resonance in the charge liquid visible in the conductance. The QPT is of the Kosterlitz-Thouless ty...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific Reports
سال: 2018
ISSN: 2045-2322
DOI: 10.1038/s41598-018-28822-y