Time-resolved x-ray photoelectron spectroscopy at FLASH

被引：65
作者：
Hellmann, S. [1 ]
Sohrt, C. [1 ]
Beye, M. [2 ]
Rohwer, T. [1 ]
Sorgenfrei, F. [2 ]
Marczynski-Buehlow, M. [1 ]
Kallaene, M. [1 ]
Redlin, H. [3 ,4 ]
Hennies, F. [5 ]
Bauer, M. [1 ]
Foehlisch, A. [2 ]
Kipp, L. [1 ]
Wurth, W. [2 ]
Rossnagel, K. [1 ]
机构：
[1] Univ Kiel, Inst Expt & Appl Phys, D-24098 Kiel, Germany
[2] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany
[3] Univ Hamburg, Ctr Free Electron Laser Sci, D-22761 Hamburg, Germany
[4] DESY, D-22607 Hamburg, Germany
[5] Lund Univ, Max Lab, Lund, Sweden
来源：
NEW JOURNAL OF PHYSICS | 2012年 / 14卷
关键词：
CHARGE-DENSITY-WAVE; ELECTRONIC-STRUCTURE; MONOCHROMATOR BEAMLINE; PHASE-TRANSITION; PHOTOEMISSION; 1T-TAS2; DYNAMICS; GENERATION; ENERGY; STATES;
D O I：
10.1088/1367-2630/14/1/013062
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The technique of time-resolved pump-probe x-ray photoelectron spectroscopy using the free-electron laser in Hamburg (FLASH) is described in detail. Particular foci lie on the macrobunch resolving detection scheme, the role of vacuum space-charge effects and the synchronization of pump and probe lasers. In an exemplary case study, the complete Ta 4f core-level dynamics in the layered charge-density-wave (CDW) compound 1T-TaS2 in response to impulsive optical excitation is measured on the sub-picosecond to nanosecond timescale. The observed multi-component dynamics is related to the intrinsic melting and reformation of the CDW as well as to extrinsic pump-laser-induced vacuum space-charge effects.
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页数：26
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