Quantitative vectorial spin analysis in angle-resolved photoemission: Bi/Ag(111) and Pb/Ag(111)

被引：134

作者：

Meier, Fabian ^{[1
,2
]}

Dil, Hugo ^{[1
,2
]}

Lobo-Checa, Jorge ^{[3
]}

Patthey, Luc ^{[2
]}

Osterwalder, Juerg ^{[1
]}

机构：

[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.77.165431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The concept of vectorial spin analysis in spin and angle-resolved photoemission is illustrated in this paper. Two prototypical systems, Bi/Ag(111)(root 3 x root 3)R30 degrees and Pb/Ag(111)(root 3 x root 3) R30 degrees, which show a large Rashba-type spin-orbit splitting, were investigated by means of spin and angle-resolved photoemission. The spin polarization vectors of individual bands were determined by a two-step fitting routine. First, the measured intensities are fitted with an appropriate number of suitable peaks to quantify the contributions of the individual bands; then, the measured spin polarization curves are fitted by varying the polarization direction and its magnitude for each band. We confirm that the surface states experience a large spin splitting. Moreover, we find that all surface state bands are 100% spin polarized, and that for some states, spin polarization vectors rotate out of the surface plane.

引用

页数：7

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