Temperature-dependent exchange splitting of a surface state on a local-moment magnet: Tb(0001)

被引：43

作者：

Bode, M

Getzlaff, M

Kubetzka, A

Pascal, R

Pietzsch, O

Wiesendanger, R

机构：

[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[2] Univ Hamburg, Microstruct Res Ctr, D-20355 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.83.3017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the temperature-dependent binding energies of the exchange-split Tb(0001) surface state by means of scanning tunneling spectroscopy. At T = 16 K the majority and minority part of the surface state exhibit a binding energy of -135 +/- 8 meV and +430 +/- 15 meV, respectively. Both peak positions shift with increasing temperature and continuously decrease the exchange splitting down to 200 meV at 260 K. i.e., 30 K above the bulk Neel temperature T-NB. This result is explained in terms of a decrease of helical short-range spin order with increasing temperature above T-NB.

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页码：3017 / 3020

页数：4

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