【摘要】 本文首次给出以 He-I 共振线和 Mg-K。线激发而得到的 Ag₂F 单晶体全价带光电子谱。在 UPS 谱中发现三个显著的能带,从费米能级算起它们分别处于2.OeV4.6eV 以及6.OeV 附近,它们分别标志 F2p 态、Ag4d 态以及两态的混合.实验结果与最近的 LAPW 能带计算相比较表明,4d 带的计算结果相对于实验结果向较低的束缚能方向移动了约 leV,这表明 LAPW 计算中形成小椭球形费米面的第16号能带可能在费米能级之上,这对进一步研究该晶体的物理性质具有重要意义.更多还原

【Abstract】 Total valence band’s photoemission spectra of Ag₂F single crystal wereobtained firstly by means of He-I resonance line and Mg-K_n line.In UPS spe-ctrum there are three prominent bands found nearby 2.0,4.6,and 6.0eV apartfrom Fermi level,marking respectively such states as F2_p,Ag4d and theirmixture.Comparing with the recent LAPW band calculation,the spectra showsthat the calculated value of band 4d moves about leV,relative to the experi-mental results,toward the lower binding energy.This suggests that the 16thband which forms a small ellipsoidal Fermi surface from LAPW calculation ispossibly above the Fermi level.It is important to study further the physicalproperties of the single crystal.更多还原