TEMPERATURE-DEPENDENT ELECTRONIC-STRUCTURE IN A LOCALIZED-MAGNETIC-MOMENT SYSTEM - GADOLINIUM

被引：58

作者：

LI, DQ ^{[1
]}

ZHANG, JD ^{[1
]}

DOWBEN, PA ^{[1
]}

ONELLION, M ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.45.7272

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

At normal emission, the bulklike band in gadolinium overlayers on W(110) shifts toward E(F) from 1.64 eV at 310 K to 1.43 eV at 230 K in photoemission. This is accompanied by an increase of the feature width from 0.8 eV at 320 K to 1.1 eV at 230 K. The surface-state binding energy remains unchanged, though the width increases significantly with increasing temperature. The different effects of temperature upon the photoemission results obtained for the bulklike and surface states are interpreted as magnetic-order-induced band movement and spin mixing, respectively, and are discussed in the light of a quasiparticle theory. The band dispersion along SIGMABAR is also temperature dependent. We postulate that the exchange splitting of the conduction band is not uniform at different positions in k space.

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页码：7272 / 7281

页数：10

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