We use the equation-of-motion technique and non-equilibrium Green's function theory to study the Kondo effect and the Fano effect in triple quantum dots (QDs) coupled to symmetrically ferromagnetic leads whose mag...We use the equation-of-motion technique and non-equilibrium Green's function theory to study the Kondo effect and the Fano effect in triple quantum dots (QDs) coupled to symmetrically ferromagnetic leads whose magnetic moments are noncollinear.We address the question of how the noncollinear ferromagnetic leads influence the Kondo effect and how the side-coupled QDs present Fano interference.The results show that the spin splitting of the density of state (DOS) takes place in an intermediate direction between the magnetic moments in the two leads.When interdot coupling strength ti is nonzero,Fano interference begins to play a major role in complicating the DOS of QD0.展开更多
基金Supported by the Scientific Research Fund of Southwest Petroleum University,the Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University)(No PLN1137)the Sichuan Youth Science and Technology Fund(No 2011JQ0044)+2 种基金the National Science Fund for Distinguished Young Scholars of China(No 51125019)the National Basic Research Program of China under Grant No 2011CB201005the Scientific Research Fund(No 10ZB113)of Sichuan Provincial Educational Department.
文摘We use the equation-of-motion technique and non-equilibrium Green's function theory to study the Kondo effect and the Fano effect in triple quantum dots (QDs) coupled to symmetrically ferromagnetic leads whose magnetic moments are noncollinear.We address the question of how the noncollinear ferromagnetic leads influence the Kondo effect and how the side-coupled QDs present Fano interference.The results show that the spin splitting of the density of state (DOS) takes place in an intermediate direction between the magnetic moments in the two leads.When interdot coupling strength ti is nonzero,Fano interference begins to play a major role in complicating the DOS of QD0.
