English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A theoretical model is provided to address the parameters influencing theelectronic properties of kink-structured carbon chain at 0K. It is studied bythe principle of DFT and solving the numerical 1D time-independentSchr\"odinger equation of electron and phonon simultaneously. Two differentlengths of branches A and B, are occupied alternatively to generate theasymmetric carbon chain. The ratio of the asymmetric branch length,RAB=A/B,plays an important role in the electronic density of states DOS around Fermilevel Ef . The highest DOS(Ef) occurs if the RAB equals to 2 and while theFermi level coincides with the Von-Hove singularity at RAB=3. The location ofthe singularity point relative to the Ef is controllable via branch lengthinterestingly. By comparison with the symmetric case, tuning the branch lengthasymmetrically shows a stronger impact to shift the Ef to the singularitypoint. The numerical solution of the 1D time independent Schrodinger equationof phonon indicates that the kink reinforces the charge fluctuations but thefluctuations are minimized when the RAB goes up. Based on the simulationresults, the electron phonon coupling of the carbon nanowire decreases withchain length. In comparison to the symmetric structure, the electron phononcoupling of the asymmetric carbon chain is higher. The maximum electron phononcoupling of the asymmetric carbon chain takes place at RAB=2 . However, theweakening of the electron phonon coupling is observed owing to ultrahighconcentration of kinks. The reduction of the electron phonon coupling of thecarbon chain is occurred under pressure.

Effect of symmetry on the electronic DOS, charge fluctuations and electron-phonon coupling in carbon chains