CORRELATION BETWEEN SCREENING AND ELECTRON EFFECTIVE-MASS ACROSS THE NONMETAL-METAL TRANSITION IN ULTRATHIN FILMS

被引：27
作者：
ZHANG, JD [1 ]
MCILROY, DN [1 ]
DOWBEN, PA [1 ]
机构：
[1] UNIV NEBRASKA, CTR MAT RES & ANAL, BEHLEN LAB PHYS, LINCOLN, NE 68588 USA
来源：
PHYSICAL REVIEW B | 1995年 / 52卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.52.11380
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Angle-resolved photoemission and resonant photoemission have been used to determine the relative changes of the electron effective mass and the screening parameter across the nonmetal to metal transition in the magnesium thin films on Mo(112). Both the screening length and the electron effective mass exhibit a gradual change with Mg coverage in the transition range between half and one monolayer. The relationship of these two different measures of metallicity is in surprisingly good agreement with the relationship predicted by theory for the Mott-Hubbard transition. Our results indicate the importance of electron-electron correlation within the overlayer.
引用
收藏
页码：11380 / 11386
页数：7
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