EXPERIMENTAL-OBSERVATION OF CIRCULAR-DICHROISM IN PHOTOEMISSION

被引：8

作者：

WESTPHAL, C

BANSMANN, J

GETZLAFF, M

SCHONHENSE, G

机构：

[1] Fakultät für Physik, Universität Bielefeld

来源：

VACUUM | 1990年 / 41卷 / 1-3期

关键词：

D O I：

10.1016/0042-207X(90)90281-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new phenomenon in photoemission from adsorbates is reported. With circularly polarized synchrotron radiation and a special observation geometry (defining a 'handedness' of the directions of photon impact, electron ejection and surface normal) photoemission intensity asymmetries arise upon reversal of photon helicity. Circular Dichroism in the Angular Distribution of photoelectrons (CDAD) has been theoretically predicted in the pure electric dipole approximation. The phenomenon should occur for all molecular adsorbates which are spatially oriented. First experimental results for a diatomic molecule (CO), a polyatomic molecule (benzene) and a molecule with significant spin-orbit interaction (CH3l) revealed CDAD asymmetries in all the photoemission signals corresponding to the various molecular orbitals. © 1990 Pergamon Press plc.

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页码：87 / 89

页数：3

相关论文

共 12 条

[1] CIRCULAR-DICHROISM OF MOLECULES IN THE CONTINUOUS ABSORPTION REGION [J].

CHEREPKOV, NA .

CHEMICAL PHYSICS LETTERS, 1982, 87 (04) :344-348

[2] CIRCULAR-DICHROISM IN PHOTOELECTRON ANGULAR-DISTRIBUTIONS FROM ORIENTED LINEAR-MOLECULES [J].

DUBS, RL ;

DIXIT, SN ;

MCKOY, V .

PHYSICAL REVIEW LETTERS, 1985, 54 (12) :1249-1251

[3]

DUBS RL, 1988, COMMUNICATION

[4] PHOTOEMISSION OF MOLECULAR ADSORBATES [J].

FREUND, HJ ;

NEUMANN, M .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1988, 47 (01) :3-23

[5] THE ELECTRONIC-STRUCTURE OF AROMATIC-MOLECULES ADSORBED ON PD(111) [J].

NETZER, FP ;

MACK, JU .

JOURNAL OF CHEMICAL PHYSICS, 1983, 79 (02) :1017-1025

[6] ANGLE-RESOLVED PHOTOEMISSION AS A TOOL FOR THE STUDY OF SURFACES [J].

PLUMMER, EW ;

EBERHARDT, W .

ADVANCES IN CHEMICAL PHYSICS, 1982, 49 :533-656

[7] THEORETICAL STUDIES IN PHOTOELECTRON-SPECTROSCOPY - MOLECULAR OPTICAL-ACTIVITY IN REGION OF CONTINUOUS ABSORPTION AND ITS CHARACTERIZATION BY ANGULAR-DISTRIBUTION OF PHOTOELECTRONS [J].

RITCHIE, B .

PHYSICAL REVIEW A, 1975, 12 (02) :567-574

[8] HIGH-FLUX NORMAL INCIDENCE MONOCHROMATOR FOR CIRCULARLY POLARIZED SYNCHROTRON RADIATION [J].

SCHAFERS, F ;

PEATMAN, W ;

EYERS, A ;

HECKENKAMP, C ;

SCHONHENSE, G ;

HEINZMANN, U .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1986, 57 (06) :1032-1041

[9] SPIN-POLARIZED PHOTOELECTRONS FROM RANDOMLY ORIENTED HALOGEN MOLECULES BY UNPOLARIZED RADIATION [J].

SCHONHENSE, G ;

DZIDZONOU, V ;

KAESDORF, S ;

HEINZMANN, U .

PHYSICAL REVIEW LETTERS, 1984, 52 (10) :811-814

[10] PHOTOELECTRON SPIN-POLARIZATION SPECTROSCOPY - A NEW METHOD IN ADSORBATE PHYSICS - THE MODEL CASE OF PHYSISORBED RARE-GASES [J].

SCHONHENSE, G .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1986, 41 (01) :39-60