86 citations · 358 across the 18 of their papers we have counts for
17 papers · 1 filter
Spin-flip effects on the Andreev bound states and supercurrents in a superconductor/quantum-dot/superconductor system
Hui Pan, Tsung-Han Lin, Dapeng Yu
We investigate the spin-flip effects on the Andreev bound states and the supercurrent in a superconductor/quantum-dot/superconductor system theoretically. The spin-flip scattering…
Impurity effects on the resonant Andreev reflection in a finite-sized carbon nanotube system
Hui Pan, Tsung-Han Lin, Dapeng Yu
The influence of the impurity on the resonant Andreev reflection through a normal-metal/carbon-nanotube/superconductor system is studied theoretically. It is found that the resonan…
Photon-assisted Fano Resonance and Corresponding Shot-Noise in a Quantum Dot
Zhongshui Ma, Yu Zhu, Xin-Qi Li +2
We have studied the Fano resonance in photon-assisted transport in a quantum dot and calculated both the coherent current and spectral density of shot noise. It is predicted, for t…
ac Josephson effect in the resonant tunneling through mesoscopic superconducting junctions
Yu Zhu, Qing-feng Sun, Wei Li +2
We investigate ac Josephson effect in the resonant tunneling through mesoscopic superconducting junctions. In the presence of microwave irradiation, we show that the trajectory of…
Writing Spin in a Quantum Dot with Ferromagnetic and Superconducting Electrodes
Yu Zhu, Qing-feng Sun, Tsung-han Lin
We propose an efficient mechanism for the operation of writing spin in a quantum dot, which is an ideal candidate for qubit. The idea is based on the Andreev reflection induced spi…
Andreev-Fano Effect in a Hybrid Normal-Metal / Superconductor Interferometer
Yu Zhu, Qing-feng Sun, Tsung-han Lin
We report on a new type of Fano effect, named as Andreev-Fano effect, in a hybrid normal-metal / superconductor (N/S) interferometer embedded with a quantum dot. Compared with the…
Theory of Nonequilibrium Coherent Transport through an Interacting Mesoscopic Region Weakly Coupled to Electrodes
Yu Zhu, Tsung-han Lin, Qing-feng Sun
We develop a theory for the nonequilibrium coherent transport through a mesoscopic region, based on the nonequilibrium Green function technique. The theory requires the weak coupli…
Microwave-induced pi-junction transition in a superconductor / quantum-dot / superconductor structure
Yu Zhu, Wei Li, Tsung-han Lin +1
Using the nonequilibrium Green function, we show that microwave irradiation can reverse the supercurrent flowing through a superconductor / quantum-dot / superconductor structure.…
Submergence of the Sidebands in the Photon-assisted Tunneling through a Quantum Dot Weakly Coupled to Luttinger Liquid Leads
Yi-feng Yang, Tsung-han Lin
We study theoretically the photon-assisted tunneling through a quantum dot weakly coupled to Luttinger liquids (LL) leads, and find that the zero bias dc conductance is strongly af…
Analytical result on the supercurrent through a superconductor/quantum-dot/superconductor junction
Wei Li, Yu Zhu, Tsung-han Lin
We present an analytical result for the supercurrent across a superconductor/quantum-dot/superconductor junction. By converting the current integration into a special contour integ…
Probing Spin States of Coupled Quantum Dots by dc Josephson Current
Yu Zhu, Qing-feng Sun, Tsung-han Lin
We propose an idea for probing spin states of two coupled quantum dots (CQD), by the dc Josephson current flowing through them. This theory requires weak coupling between CQD and e…
Excess Kondo resonance in a quantum dot device with normal and superconducting leads: the physics of Andreev-normal co-tunneling
Qing-feng Sun, Hong Guo, Tsung-han Lin
We report on a novel Kondo phenomenon of interacting quantum dots coupled asymmetrically to a normal and a superconducting lead. The effects of intradot Coulomb interaction and And…
Extraordinary Temperature Dependence of the Resonant Andreev Reflection
Yu Zhu, Qing-feng Sun, Tsung-han Lin
An extraordinary temperature dependence of the resonant Andreev reflection via discrete energy level in a normal-metal / quantum-dot / superconductor (N-QD-S) system is predicted t…
Andreev reflection through a quantum dot coupled with two ferromagnets and a superconductor
Yu Zhu, Qing-feng Sun, Tsung-han Lin
We study the Andreev reflection (AR) in a three terminal mesoscopic hybrid system, in which two ferromagnets (F and F) are coupled to a superconductor (S) through a quantum…
Asymmetric double quantum dots as a subminiature mesoscopic cell
Qing-feng Sun, Jian Wang, Tsung-han Lin
A subminiature mesoscopic cell, consisting of an asymmetric double quantum dot capacitively coupled to a nearby mesoscopic circuit, is proposed, which can transform disordered nois…
Andreev bound states and -junction transition in a superconductor / quantum-dot / superconductor system
Yu Zhu, Qing-feng Sun, Tsung-han Lin
We study Andreev bound states and -junction transition in a superconductor / quantum-dot / superconductor (S-QD-S) system by Green function method. We derive an equation to desc…
Nonequilibrium transport through a quantum dot weakly coupled to Luttinger liquids
Yi-feng Yang, Tsung-han Lin
We study the nonequlibrium transport through a quantum dot weakly coupled to Luttinger liquids (LL). A general current expression is derived by using nonequilibrium Green function…