Symmetry-dependent transport properties and magnetoresistance in zigzag silicene nanoribbons

Kang, Jun; Wu, Fengmin; Li, Jingbo

doi:10.1063/1.4726276

Cited by 131 publications

(83 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. Our first-principle calculations indicate that the left panel, 4-ZSiNR-H 2 , has an antiferromagnetic ground state, while the right panel, 4-ZSiNR-H, has a ferromagnetic one, which are consistent with their previous magnetism studies 31 . From the band structures shown in Figs.…”

Section: Resultssupporting

confidence: 90%

Design for a spin-Seebeck diode based on two-dimensional materials

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

Studies of the Spin-Seebeck effect (SSE) are very important for the developments of fundamental science and novel low-power-consumption technologies. Spin-Seebeck diode (SSD), in which the spin current can be driven by a forward temperature gradient but not by a reverse temperature gradient, is a key unit in spin caloritronic devices. Here, we propose a new design of SSD using two-dimensional (2D) materials such as the silicene and phosphorene nanoribbons as the source and drain. Due to their unique band structures and magnetic states, thermally driven spin-up and spindown currents flow in opposite directions. This mechanism is different from that of the previous one that uses two Permalloy circular disks [Phys. Rev. Lett. 2014, 112, 047203], and the SSD in our design can be easily integrated with gate voltage control. Since the concept of this design is rather general and applicable to many 2D materials, it is promising for the realization and exploitation of SSD in nanodevices. PACS number(s): 73.23.Hk

show abstract

Section: Resultssupporting

confidence: 90%

Design for a spin-Seebeck diode based on two-dimensional materials

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…Electronic, mechanical and magnetic properties of SiNRs have been studied recently by first-principle numerical methods [8][9][10][11]. In particular, electronic transport properties of SiNRs with zigzag edges (zSiNRs) have revealed a magnetoresistance effect [9] associated with transition of the edge magnetism from ferromagnetic to antiferromagnetic ordering.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric effects in silicene nanoribbons

et al. 2013

View full text Add to dashboard Cite

Transport and thermoelectric coefficients (including also spin thermopower) of silicene nanoribbons with zigzag edges are investigated by ab-initio numerical methods. Local spin density of such nanoribbons reveals edge magnetism. Like in graphene, one finds antiferromagnetic and ferromagnetic ordering, with spin polarization at one edge antiparallel or parallel to that at the other edge, respectively. Thermoelectric properties, especially the Seebeck coefficient, significantly depend on the electronic band structure and are enhanced when the Fermi level is in the energy gap. However, these thermoelectric properties are significantly reduced when the phonon contribution to the heat conductance is included. This phonon contribution has been calculated numerically by two different methods. Transition from antiferromagnetic to ferromagnetic states leads to a large magnetoresistance as well as to a considerable magnetothermopower. Thermoelectric parameters in the antiparallel configuration, when spin polarization in the left part of the nanoribbon is opposite to that in the right part, are also analyzed.

show abstract

“…Xu et al 43 study the transport properties of finite ZSiNRs connecting two planar silicene electrodes and find that by using a magnetic field to switch the magnetic coupling between the two edges, a maximum optimistic MR up to 1960% is obtained because of a large current difference between the semiconducting AFM and metallic FM states. Besides, Kang et al 44 predicted a MR of up to 10 6 % in even-n ZSiNRs through switching the spin configuration of the two electrodes from parallel to anti-parallel configuration. The various measures to modulate the devices based on silicene show that it could provide flexibility for device design and is of great potential in the future nanoscale spintronics.…”

Section: Spin Field Effect Transistormentioning

confidence: 99%

Half-Metallic Silicene and Germanene Nanoribbons: Towards High-Performance Spintronics Device

Wang

Zheng

et al. 2012

NANO

119

View full text Add to dashboard Cite

By using first-principles calculations, we predict that an in-plane homogenous electrical field can induce half-metallicity in hydrogen-terminated zigzag silicene and germanene nanoribbons (ZSiNRs and ZGeNRs). A dual-gated finite ZSiNR device reveals a nearly perfect spin-filter efficiency of up to 99% while a quadruple-gated finite ZSiNR device serves as an effective spin field effect transistor (FET) with an on/off current ratio of over 100 from ab initio quantum transport simulation. This discovery opens up novel prospect of silicene and germanene in spintronics.

show abstract

Symmetry-dependent transport properties and magnetoresistance in zigzag silicene nanoribbons

Cited by 131 publications

References 25 publications

Design for a spin-Seebeck diode based on two-dimensional materials

Design for a spin-Seebeck diode based on two-dimensional materials

Thermoelectric effects in silicene nanoribbons

Half-Metallic Silicene and Germanene Nanoribbons: Towards High-Performance Spintronics Device

Contact Info

Product

Resources

About