Observation of photoemission line widths narrower than the inverse lifetime

被引：34
作者：
Hansen, ED
Miller, T
Chiang, TC
机构：
[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.80.1766
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum mechanics stipulates that experimental spectral lines cannot be narrower than the inverse lifetime. However, this limitation can be overcome in angle-resolved photoemission, and we have observed unusually narrow photoemission peaks derived from a bulk valence band of Ag. This observation is made possible by judiciously choosing a grazing emission geometry to reach a specific tune in the reciprocal space, where the final-state lifetime effect is suppressed, and simultaneously the initial-state lifetime contribution is kinematically compressed.
引用
收藏
页码：1766 / 1769
页数：4
相关论文
共 13 条
[1]   ANGLE-RESOLVED PHOTOEMISSION, VALENCE-BAND DISPERSIONS E(K-]), AND ELECTRON AND HOLE LIFETIMES FOR GAAS [J].
CHIANG, TC ;
KNAPP, JA ;
AONO, M ;
EASTMAN, DE .
PHYSICAL REVIEW B, 1980, 21 (08) :3513-3522
[2]   Overlayer test of surface photoemission effect in Cu(100) [J].
Hansen, ED ;
Miller, T ;
Chiang, TC .
PHYSICAL REVIEW LETTERS, 1997, 78 (14) :2807-2810
[3]  
Hufner S., 1995, Photoelectron Spectroscopy, VVolume 82
[4]  
LOWSER AG, 1996, SCIENCE, V273, P325
[5]   ANGLE-RESOLVED PHOTOEMISSION FROM CU(001) - INFLUENCE OF ANGULAR RESOLUTION ON LINE-WIDTHS [J].
MATZDORF, R ;
GOLDMANN, A ;
BRAUN, J ;
BORSTEL, G .
SOLID STATE COMMUNICATIONS, 1994, 91 (02) :163-166
[6]   PHONON CONTRIBUTION TO QUASI-PARTICLE LIFETIMES IN CU MEASURED BY ANGLE-RESOLVED PHOTOEMISSION [J].
MCDOUGALL, BA ;
BALASUBRAMANIAN, T ;
JENSEN, E .
PHYSICAL REVIEW B, 1995, 51 (19) :13891-13894
[7]  
ONG NP, 1996, SCIENCE, V273, P31
[8]   TEMPERATURE-DEPENDENCE OF SHOCKLEY-TYPE SURFACE-ENERGY BANDS ON CU(111), AG(111) AND AU(111) [J].
PANIAGO, R ;
MATZDORF, R ;
MEISTER, G ;
GOLDMANN, A .
SURFACE SCIENCE, 1995, 336 (1-2) :113-122
[9]  
Smith N. V., 1992, Comments on Condensed Matter Physics, V15, P263
[10]   PHOTOEMISSION SPECTRA AND BAND STRUCTURES OF D-BAND METALS .3. MODEL BAND CALCULATIONS ON RH,PD,AG,IR,PT, AND AU [J].
SMITH, NV .
PHYSICAL REVIEW B, 1974, 9 (04) :1365-1376
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