Journal Article

PUBDB-2021-02577

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultrafast spot-profile LEED of a charge-density wave phase transition

Storeck, G. ; Rossnagel, K.DESY* ; Ropers, C. (Corresponding author)

2021
American Inst. of Physics Melville, NY

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Please use a persistent id in citations: doi:10.1063/5.0052603  doi:10.3204/PUBDB-2021-02577

Abstract: We investigate the optically driven phase transition between two charge-density wave (CDW) states at the surface of tantalum disulfide(1T-TaS2). Specifically, we employ a recently improved ultrafast low-energy electron diffraction setup to study the transition from the nearlycommensurate to the incommensurate (IC) CDW state. The experimental setup allows us to follow transient changes in the diffraction pat-tern with high momentum resolution and 1-ps electron pulse duration. In particular, we trace the diffraction intensities and spot profiles ofthe crystal lattice, including main and CDW superstructure peaks, as well as the diffuse background. Harnessing the enhanced data quality ofthe instrumental upgrade, we follow the laser-induced transient disorder in the system and perform a spot-profile analysis that yields a sub-stantial IC-peak broadening for very short time scales followed by a prolonged spot narrowing.

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Contributing Institute(s):

1. FS-SXQM (FS-SXQM)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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