2009/05/04 by Yun-Pil Shim, Y. -P. Shim, F. Delgado +3
Engineering · Physics and Astronomy · #Atomic physics #Condensed matter physics #Magnetic field #Molecular Junctions and Nanostructures #Molecular physics #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum tunnelling #Scanning tunneling spectroscopy #Semiconductor Quantum Structures and Devices #Spectroscopy #Spin (aerodynamics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.80.115305
published as Phys. Rev. B 80, 115305 (2009) · 33 pages, 9 figures
arxiv created 2009/05/04 · openalex publication_date 2009/09/04 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a theory of tunneling spectroscopy of spin-selective Aharonov-Bohm oscillations in a lateral triple quantum dot molecule. The theory combines exact treatment of an isolated many-body system with the rate equation approach when the quantum dot molecule is weakly connected to the leads subject to arbitrary source-drain bias. The tunneling spectroscopy of the many-body complex is analyzed using the spectral functions of the system and applied to holes in a quantum dot molecule. Negative differential conductance is predicted and explained as a result of the redistribution of the spectral weight between transport channels. It is shown that different interference effects on singlet and triplet hole states in a magnetic field lead to spin-selective Aharonov-Bohm oscillations.