Universal transport properties of a quantum dot system with a laterally-coupled Majorana zero mode

Gong, Wei‐Jiang; Zhao, Ying; Gao, Zhen; Zhang, Shufeng

doi:10.1016/j.cap.2015.01.033

Cited by 16 publications

(3 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This realizes the controllable nonlocal transport of them [33,34]. Secondly, the MBS affects the transport through the conventional QD circuit by giving rise to the sharp change of the resonant or antiresonant tunnelings [35][36][37][38][39]. And the electron correlations effect is also been re-constructed when MBSs are introduced to the QD systems [40,41].…”

Section: Introductionmentioning

confidence: 99%

Interference effect on the Andreev reflections induced by Majorana bound states

Gong

Dai

Zhang

et al. 2021

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

We investigate the effect of quantum interference on the Andreev reflections (ARs) induced by Majorana bound states (MBSs), by considering their additional coupling via a quantum-dot molecule. It is found that due to the direct and indirect couplings of MBSs, a quantum ring is constructed in this system. Consequently, the interference effect makes important contribution to the ARs, especially in the presence of the local magnetic flux. All the results are manifested as the tight dependence of the differential conductance and Fano factors on the magnetic flux phase factor, dot-MBS couplings, and the dot level, respectively. Moreover, at the zero-bias limit, the magnitudes of the Fano factors and their relation can be efficiently altered by the interference properties. We believe that quantum interference is important for manipulating the Andreev reflection behaviors of the MBSs.

show abstract

Section: Introductionmentioning

confidence: 99%

Interference effect on the Andreev reflections induced by Majorana bound states

Gong

Dai

Zhang

et al. 2021

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…[41] It has been demonstrated that the MBS affects the conductance through the noninteracting QD by giving rise to the sharp decrease of the conductance by 1/2. [42][43][44] When the MBSs are indirectly coupled to the leads via QDs, the local and crossed Andreev reflections can be controlled by shifting the QD levels. This realizes the con-trollable nonlocal transport of MBSs.…”

Section: Introductionmentioning

confidence: 99%

Suppression of leakage effect of Majorana bound states in the T-shaped quantum-dot structure*

Gong¹,

Xue²,

Wang³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

We theoretically study the transport properties in the T-shaped double-quantum-dot structure, by considering the dot in the main channel to be coupled to the Majorana bound state (MBS) at one end of the topological superconducting nanowire. It is found that the side-coupled dot governs the effect of the MBS on the transport behavior. When its level is consistent with the energy zero point, the MBS contributes little to the conductance spectrum. Otherwise, the linear conductance exhibits notable changes according to the inter-MBS coupling manners. In the absence of inter-MBS coupling, the linear conductance value keeps equal to e 2/2h when the level of the side-coupled dot departs from the energy zero point. However, the linear conductance is always analogous to the MBS-absent case once the inter-MBS coupling comes into play. These findings provide new information about the leakage effect of MBSs in quantum-dot structures.

show abstract

“…Furthermore, the transport properties of mesoscopic circuits have been investigated by considering finite couplings between the regular bound states and the MBSs, especially the Majorana zero mode (MZM) [37]. It has been demonstrated that the MZM affects the conductance through the noninteracting QD by giving rise to the sharp decrease of the conductance by 1 2 [38][39][40]. When the MZMs are indirectly coupled to the leads via QDs, the local and crossed Andreev reflections can be controlled by shifting the QD levels.…”

Section: Introductionmentioning

confidence: 99%

Erasable signature of Majorana bound state due to coupling with the T-shaped quantum-dot structure

Gong¹,

Xue²,

Wang³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

We theoretically study the transport properties in the T-shaped double-quantum-dot structure, by introducing the Majorana bound state (MBS) to couple to the dot in the main channel. It is found that the side-coupled dot governs the effect of the MBS on the transport behavior. When its level is consistent with the energy zero point, the MBS contributes little to the conductance spectrum. Otherwise, the linear conductance exhibits notable changes according to the inter-MBS coupling manners. In the case of Majorana zero mode, the linear conductance value keeps equal to e 2 2h when the level of the side-coupled dot departs from the energy zero point. However, the linear conductance is always analogous to the MBS-absent case once the inter-MBS coupling comes into play. These findings provide new information about the interplay between the MBSs and electron states in the quantum dots.

show abstract

Universal transport properties of a quantum dot system with a laterally-coupled Majorana zero mode

Cited by 16 publications

References 36 publications

Interference effect on the Andreev reflections induced by Majorana bound states

Interference effect on the Andreev reflections induced by Majorana bound states

Suppression of leakage effect of Majorana bound states in the T-shaped quantum-dot structure*

Erasable signature of Majorana bound state due to coupling with the T-shaped quantum-dot structure

Contact Info

Product

Resources

About