Tuning the conductance of monatomic carbon chain

Chen, Xi; Chen, Ming; Meng, Fanhui; Li, Jingtian; Zhuang, Jun; Ning, Xi-Jing

doi:10.1063/1.4826200

Cited by 6 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These NWs show enhanced magnetism, as compared to their bulk (3D) state, and quantized conductance. They are predicted to be technologically useful for spintronics-based devices. , Various studies have been carried out on 1D monatomic chains , including transition elements of 3d series, ,,− 4d series, , 5d series, ,,, and alkali metals. − It was found that Pt nanowires exhibit Hund’s rule magnetism, and the magnetic moment increases upon stretching; however, in the bulk state Pt does not show magnetism . Delin et al explored the spin dynamics of atomically thin platinum wires based on first-principles calculations.…”

Section: Introductionmentioning

confidence: 99%

“…They are predicted to be technologically useful for spintronics-based devices. 13,40 Various studies have been carried out on 1D monatomic chains 41,42 including transition elements of 3d series, 17,38,43−55 4d series, 17,37 5d series, 17,30,56,57 and alkali metals. 57−59 It was found that Pt nanowires exhibit Hund's rule magnetism, and the magnetic moment increases upon stretching; however, in the bulk state Pt does not show magnetism.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ferromagnetism in Monatomic Chains: Spin-Dependent Bandwidth Narrowing/Broadening

2017

View full text Add to dashboard Cite

We have analyzed the role of band narrowing/broadening in the magnetic and electronic properties of low dimensional itinerant strongly correlated electronic systems, which is particularly important in 3d transition elements. Density functional theory and mean field results have been coupled to explain the magnetic phenomenon in a one-dimensional monatomic chain of 3d transition elements Sc, Ti, V, Cr, Mn, Fe, Co, and Ni. We found that in the ferromagnetic ground state not only the band splitting but also the relative band narrowing/broadening play a crucial role, and the bandwidths of both spins become different as a manifestation of correlated spin hopping interaction. For less than the half-filled band (i.e., for Sc, Ti, V, and Cr), the up spin band broadens, and the down spin band narrows. For the (half and) more than half filled band (i.e., for Mn, Fe, Co, and Ni), the down spin band broadens, and the up spin band narrows. As a result, (in most of the cases) only one spin channel is present for conduction, showing ferromagnetism which could be useful for spintronics.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Ferromagnetism in Monatomic Chains: Spin-Dependent Bandwidth Narrowing/Broadening

2017

View full text Add to dashboard Cite

show abstract

“…The numerical observations of ILM/DB in two-dimensional carbon materials imply the existence of ILM/DB in the carbon monoatomic chain. The carbon monoatomic chain attracts researcher's attentions because of its characteristics in heat and electric conductance [11,12]. The aim of our research is to investigate whether ILM/DB exists in a carbon monoatomic chain or not and how ILM/DB affects the characteristics of the chain such as heat and electric conductance.…”

Section: Introductionmentioning

confidence: 99%

Existence and stability of intrinsic localized modes in a finite FPU chain placed in three-dimensional space

Kimura¹,

Mitani²,

S³

2016

LoM

View full text Add to dashboard Cite

Fermi-Pasta-Ulam (FPU) chain is well known model in which energy localized vibrations exist. Such energy localized vibrations are called intrinsic localized modes (ILMs) or discrete breathers (DBs). This paper discusses existence and stability of ILMs in a finite Fermi-Pasta-Ulam chain which is placed in three-dimensional space, namely, motion of each mass is not constraint to the axis of the chain. First we derive dispersion relations of longitudinal and transversal waves. It is shown that the dispersion relations are changed with respect to the initial stretch or compression of the chain. By using Newton-Raphson method, three kinds of ILM, namely, longitudinal, transversal, and rotating modes, are found in the chain. All masses moves along the axis of the chain in longitudinal modes. The relationship between the frequency and the amplitude distribution completely coincides with ILMs in the traditional FPU chain in which motions of masses are constraint along the axis. On the other hand, main oscillations of transversal modes are perpendicular to the axis. In rotating modes, all masses rotate around the axis. Distribution of the radius of rotations are localized. Stability analysis reveals that almost all the longitudinal and the transversal ILMs are unstable. However, we found a narrow parameter region of the initial stretch in which the transversal ILM becomes stable.

show abstract

“…sheet by using a high-energy electron beam has raised some attention [16][17][18][19][20][21][22][23][24][25]. Motivated by the fabrication of stable carbon atomic chains, many theoretical studies were performed on the electronic properties of SCAC nanostructures for their perfect sp2 contact [26][27][28][29]. And their special properties such as spin-split, spin-polarity effect and the remarkable oscillatory conducting behavior, gave rise to numerous studies for designing nanoelectronic devices [30][31][32][33][34][35][36][37][38].…”

mentioning

confidence: 99%

Perfect spin filter and strong current polarization in carbon atomic chain with asymmetrical connecting points

Chen¹,

Li²,

Wang³

et al. 2014

EPL

View full text Add to dashboard Cite

The spin-dependent electron transport properties through a single-carbon atomic chain (SCAC) sandwiched between two-zigzag-graphene-nanoribbon (zGNR) electrodes are investigated by performing first-principles calculations based on the nonequilibrium Green's function (NEGF) approach in combination with spin density functional theory (DFT). Our calculations show that SCAC connecting two zGNRs with asymmetry-contacting points is a perfect spin filter in the transmission function within a large energy range. Moreover, the spin-dependent electron transmission spectra exhibit robust transport polarization characteristics and a strong current polarization behavior (almost 100%) can be found. The microscopic mechanisms are proposed for the spin-related phenomena.

show abstract

Tuning the conductance of monatomic carbon chain

Cited by 6 publications

References 32 publications

Ferromagnetism in Monatomic Chains: Spin-Dependent Bandwidth Narrowing/Broadening

Ferromagnetism in Monatomic Chains: Spin-Dependent Bandwidth Narrowing/Broadening

Existence and stability of intrinsic localized modes in a finite FPU chain placed in three-dimensional space

Perfect spin filter and strong current polarization in carbon atomic chain with asymmetrical connecting points

Contact Info

Product

Resources

About