并利用这一规律,通过化学方法设计合成了具有高二次谐波响应的二维材料NbO(I0.60Br0.40)2。相关成果以“Manipulating Peierls distortion in van der Waals NbOX2maximizes second-harmonic generation”为题近期发表于《美国化学会志》Journal of the American Chemical Society上。 图1.(a) NbOI2晶体结构示意图;(b) ...
Peierls distortionsecond order perturbationThe Peierls distortions in a two-dimensional electron-lattice system described by a Su-Schrieffer-Heeger type model extended to two-dimensions are numerically studied for a square lattice. The electronic band is just half-filled and the nesting vector is ($\...
并利用这一规律,通过化学方法设计合成了具有高二次谐波响应的二维材料NbO(I0.60Br0.40)2。相关成果以“Manipulating Peierls distortion in van der Waals NbOX2maximizes second-harmonic generation”为题近期发表于《美国化学会志》Journalof the American Chemical Society上。 图1.(a)NbOI2晶体结构示意图;(b) 0...
并利用这一规律,通过化学方法设计合成了具有高二次谐波响应的二维材料NbO(I0.60Br0.40)2。相关成果以“Manipulating Peierls distortion in van der Waals NbOX2maximizes second-harmonic generation”为题近期发表于《美国化学会志》Journal of the American Chemical Society上。 图1.(a) NbOI2晶体结构示意图;(b) ...
Metal-insulator transition of monoclinic VO2 thin film without Peierls distortion VO2 thin film with a metal-insulator transition (MIT) temperature of about 37 degrees C was fabricated on the 300 degrees C indium-tin oxide substrates, in... TZY Lin - 《Vacuum Technology Applications & Ion Phys...
Exchange and correlation effects were treated within a local approximation and special emphasis was put on whether the calculations yielded a structure with alternating bond lengths as that with the lowest total energy (i.e. on whether a Peierls' distortion was found) as well as on the ...
Peierls distortionpolyacetyleneself-consistent numerical approachequilibrium positioncross-overA selfconsistent numerical approach, which allows each (CH)-group in a finite polyacetylene chain to relax to its equilibrium position, is used to investigate the crossover from the Peierls-gap to the electron-...
(Received~9 埘11998~revvedmanuscriptreceived27Al】g1998) ABSTRACT ByusingtheFermi- Bosetransformation.theantiferromagneticdmiI1ismappedintothebo$ o~c field,andtheensrgydensityofthegroundstateandtheexciteStates.fthemodela 舵given.The relationshipbetweentheenergydensityofthegroundstateandthesngthofdistortionof...
We present a variational principle for the coupled electron-lattice system, which is expected to exhibit a Peierls distortion. A nonlinear equation for the electron wave function in one dimension is derived. This equation is investigated for the case of a single electron, and the resulting energy...