Density Functional Theory Calculations Showed That These Observations In Hbn/Cu(111) Heterostructures Mainly Originated From The Hybridization Of The N 3P Z Orbital And Cu 4S Orbital In Different Atomic.
In addition, the electronic structure and the work function of mose2 are modulated electrostatically with an amplitude of ~ 0.13 ev. The work function of metal ag is 4.26 ev, and that of metal al is 4.28 ev. Thus, the fermi levels are positioned lower than the mlg work function level.
The Vertical Axis Is The Averaged Photoelectron Intensity In Each Rectangle For A Ccd Camera Exposure Time Of 10 S.
Furthermore, we show that the local work function modulation on the monolayer layer hbn results in a rigid shift of the band structure of mose 2 without changing the band Moreover, the work function modulation shifts agree well with the conduction band edge shifts, indicating a spatially constant electron affinity for the hbn layer. Most interestingly, this electrostatic modulation is spatially in phase with the moir\'e pattern of hbn on ru(0001) whose surface also exhibits a work function modulation of the same amplitude.
The Photoelectrons Collected Overcome The Work Function (Wf).
However, there was a shift in vbm of i. In addition, the band gap of hbn also exhibits a. Therefore, 200 000 pulses are used to create each image.
Most Interestingly, This Electrostatic Modulation Is Spatially In Phase With The Moir\'E Pattern Of Hbn On Ru(0001) Whose Surface Also Exhibits A Work Function Modulation Of The Same Amplitude.comment:
The inset is the structure diagram. In the case of ‘v. The wf of a metal surface is usually defined as the minimum energy needed to take an electron away from the fermi level to the vacuum level.
In Practical Applications, The Work Function (Wf) Is A Very Important Parameter To Evaluate A Material's Field Emission Properties And The Schottky Barriers Of Contact, Such As The Contact Between A Metal And A Semiconductor.
Work function and the band gap as a function of the moiré pattern wavelength. We find a spatial modulation of the work function with an amplitude ranging from 0.3 ev for λ =14nm to a negligible value for λ = 3.5 nm. Figure 3f,g shows the local work function modulation of hbn/ru(0001) is 0.14 ev, and for the mose 2 overlayer such modulation is 0.16 ev, both in excellent agreement with the periodic band offset.