The effective mass of a free-electron-like surface state of the Si(111)√3x√3-Ag surface investigated by photoemission and scanning tunneling spectroscopies

被引：46

作者：

Hirahara, T ^{[1
]}

Matsuda, I ^{[1
]}

Ueno, M ^{[1
]}

Hasegawa, S ^{[1
]}

机构：

[1] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

SURFACE SCIENCE | 2004年 / 563卷 / 1-3期

基金：

日本学术振兴会;

关键词：

angle resolved photoemission; scanning tunneling spectroscopies; surface electronic phenomena (work function; surface potential; surface states; etc.); silicon; silver; metallic surfaces;

D O I：

10.1016/j.susc.2004.06.157

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A small electron pocket composed of a metallic and parabolic surface-state band of Si(1 1 1)root3 x root3-Ag was investigated in detail by high-resolution angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling spectroscopy (STS). The Fermi surface was a complete circle (Fermi ring), and the band dispersion was determined three dimensionally in energy momentum space. The effective mass (m*) was extracted by a new method, two-dimensional (2D) fitting to the band dispersion, and compared with the results of conventional analyses of energy and momentum distribution curves (EDC and MDC). The EDC (MDC) analysis gave a m* value larger (smaller) than that obtained by the 2D fitting method by about 20%. The m* obtained by the 2D fitting was in good agreement with the value obtained by the STS measurements of electron standing waves, giving the most plausible value of m* = (0.13 +/- 0.03)m(e) (m(c) is the free-electron mass) for the parabolic band. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：191 / 198

页数：8

共 30 条

[1] First-principles study of Ag adatoms on the Si(111)-√3 x √3-Ag surface [J].

Aizawa, H ;

Tsukada, M .

PHYSICAL REVIEW B, 1999, 59 (16) :10923-10927

[2]

Ast CR, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.125103

[3] Fermi surfaces of surface states on Si(111)-Ag, Au [J].

Crain, JN ;

Altmann, KN ;

Bromberger, C ;

Himpsel, FJ .

PHYSICAL REVIEW B, 2002, 66 (20) :1-8

[4] Tunneling spectroscopy of the Si(111)2x1 surface [J].

Feenstra, RM .

PHYSICAL REVIEW B, 1999, 60 (07) :4478-4480

[5] Buckling and band gap of the Ge(111)2 X 1 surface studied by low-temperature scanning tunneling microscopy [J].

Feenstra, RM ;

Meyer, G ;

Moresco, F ;

Rieder, KH .

PHYSICAL REVIEW B, 2001, 64 (08)

[6] Photoemission above the Fermi level: The top of the minority d band in nickel [J].

Greber, T ;

Kreutz, TJ ;

Osterwalder, J .

PHYSICAL REVIEW LETTERS, 1997, 79 (22) :4465-4468

[7] Structures and electronic transport on silicon surfaces [J].

Hasegawa, S ;

Tong, X ;

Takeda, S ;

Sato, N ;

Nagao, T .

PROGRESS IN SURFACE SCIENCE, 1999, 60 (5-8) :89-257

[8] Direct measurement of surface-state conductance by microscopic four-point probe method [J].

Hasegawa, S ;

Shiraki, I ;

Tanikawa, T ;

Petersen, CL ;

Hansen, TM ;

Boggild, P ;

Grey, F .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (35) :8379-8392

[9] Electronic transport at semiconductor surfaces - from point-contact transistor to micro-four-point probes [J].

Hasegawa, S ;

Grey, F .

SURFACE SCIENCE, 2002, 500 (1-3) :84-104

[10] Electron-phonon coupling in photoemission spectra [J].

Hengsberger, M ;

Frésard, R ;

Purdie, D ;

Segovia, P ;

Baer, Y .

PHYSICAL REVIEW B, 1999, 60 (15) :10796-10802

← 1 2 3 →