Shot noise as a measure of the lifetime and energy splitting of Majorana bound states

Lü, Haifeng; Guo, Zhou; Ke, Sha-Sha; Guo, Yong; Zhang, Huaiwu

doi:10.1063/1.4919748

Cited by 7 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as long as the nanowire is long enough and we can initialize the system in one of these states, we could remain close to it for arbitrarily amounts of time. For a 8000nm long nanowire with the realistic parameter we have been using so far, for example, we find that the energy for these states stays peaks at around 0.2µeV for a field close to 2B c , while it can be two orders of magnitude smaller at fields just above B c , which is compatible with literature [44]. This results in a period of around 20nm to 2µs for the time oscillations.…”

Section: Figure 39supporting

confidence: 90%

Majorana bound states in nanowire junctions

Casa¹

View full text Add to dashboard Cite

This work would not have been possible without the support from my family and friends. A special thanks to Julia for correcting my grammar.I'd like to thank Prof. Luis Gregório Dias for not only taking me as his student during these two years, but also for introducing me to this exciting and lively field of topological materials. I extend this thanks to Bruna, João, Marcos, Raphael and Vinícius, for all the helpful discussions and conversations.I'd also like to thank Prof. Annica Black-Schaffer for welcoming me into her research group during my exchange program to Uppsala University, as well as Jorge Cayao and Oladunjoye Awoga, for mentoring me during that period. This work would not have been possible without their help.

show abstract

Section: Figure 39supporting

confidence: 90%

Majorana bound states in nanowire junctions

Casa¹

View full text Add to dashboard Cite

show abstract

“…It should be emphasized that shot noise represents a promising way to study topological materials and to detect the Majorana mode via noise measurements of the normal-superconducting nanowire structure [50]. Furthermore, authors of [51] have presented a method of obtaining information about Majorana lifetime and its energy splitting from current noise measurements when one of the MBSs couples to a dynamical channel system.…”

Section: Shot Noise For Characterization Of Topological Nws Propertie...mentioning

confidence: 99%

Noise spectroscopy of nanowire structures: fundamental limits and application aspects

Vitusevich

Zadorozhnyi

2017

Semicond. Sci. Technol.

View full text Add to dashboard Cite

Nanowires (NWs) have recently emerged as a new class of materials demonstrating unique properties which may completely differ from their bulk counterparts. The main aim of this work is to give an overview of results on noise and fluctuation phenomena in NW-based structures. We emphasize that noise is one of the main parameters, which determines the characteristics of the device structures and sets the fundamental limits of the working principles and operation regimes of NWs as key electronic elements, including field-effect transistors (FETs). We review the studies focusing on the understanding of noise sources and the main application aspects of noise spectroscopy. Noise application aspects will provide information about the performance of core-shell NW structures, the gate-coupling effect and its advantages for detection of the useful signal with prospects to extract it from the noise level, random telegraph signal as a useful tool for enhanced sensitivity, novel components of noise reflecting dielectric polarization fluctuation processes and fluctuation phenomena as a sensitive tool for molecular charge dynamics in NW FETs. Moreover, noise spectroscopy assists understanding of electronic transport regimes and effects, transport peculiarities in topological materials and aspects reflecting Majorana bound states. Thus noise in NWs on the basis of Si, Ge, Si/Ge, GaAs, InAs, InGaAs, Au, GaAs/ AlGaAs, GaAsSb, SnO 2 , GaN, ZnO, CuO, In 2 O 3 and AlGaN/GaN materials reflects a great variety of phenomena and processes, information about their stability and reliability. It can be utilized for numerous different applications in nanoelectronics and bioelectronics.

show abstract

“…It is very effective to use shot noise to study spin-related transport processes [14], and the results of using it as a detection tool have been widely reported. For example, the lifetime and energy splitting of Majorana bound states are measured using shot noise [15], and the shot noise is used to realize the non-equilibrium energy local detection in the diffused metal wire [16]. Zhang et al reported the experimental result that the shot noise in MgO-based magnetic tunnel junctions is sub-Poisson.…”

Section: Introductionmentioning

confidence: 99%

The shot noise in quasi-one-dimensional single spin filter magnetic heterojunctions

Lü,

Fang,

Xie

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

Based on the free electronic model and Büttike’s theory on shot noise, we investigated the shot noise of spin electrons in ferromagnetic/non-ferromagnetic insulator/spin filter layer/normal metal (FM/I/SF/NM) quasi-one-dimensional single spin filter tunneling junctions. The calculation results show that the barrier heights and thicknesses of the insulator and spin filter layers strongly affect the values and phases of the Fano factors of spin electrons. Compared with the traditional sandwich structures of ferromagnetic/spin filter layer/normal metal (FM/SF/NM) and ferromagnetic/non-ferromagnetic insulator/normal metal (FM/I/NM), when the thicknesses of the insulator and spin filter layers are very small, in single spin filter magnetic heterojunctions (FM/I/SF/NM), the insulator layer can suppress the Fano factors, while the spin filter layer is easier to separate the Fano factors of electrons whose spin directions are different. Further analysis shows that whether the Rashba coupling in the spin filter layer has an obvious influence on the Fano factors of spin electrons depends on the thickness of the spin filter layer. On the other hand, the Fano factors are strongly dependent on the sizes and directions of the molecular fields of the ferromagnet and spin filter layers. In addition, the electrons are incident with low energy or high energy, and the barrier heights and thicknesses of the spin filter layer and the thicknesses of the insulation layer have a significant effect on the spin-direction-dependent Fano factors of electrons.

show abstract

Shot noise as a measure of the lifetime and energy splitting of Majorana bound states

Cited by 7 publications

References 44 publications

Majorana bound states in nanowire junctions

Majorana bound states in nanowire junctions

Noise spectroscopy of nanowire structures: fundamental limits and application aspects

The shot noise in quasi-one-dimensional single spin filter magnetic heterojunctions

Contact Info

Product

Resources

About