Detail publikace
Koexistence fází a zachytávání vln nábojové hustoty na rozhraních v chromu
SINGER, A. PATEL, S. UHLÍŘ, V. KUKREJA, R. ULVESTAD, A. DUFRESNE, E. SANDY, A. FULLERTON, E. SHPYRKO, O.
Český název
Koexistence fází a zachytávání vln nábojové hustoty na rozhraních v chromu
Anglický název
Phase coexistence and pinning of charge density waves by interfaces in chromium
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
We study the temperature dependence of the charge density wave (CDW) in a chromium thin film using x-ray diffraction. We exploit the interference between the CDW satellite peaks and Laue oscillations to determine the amplitude, the phase, and the period of the CDW. We find discrete half-integer periods of CDW in the film and switching of the number of periods by one upon cooling/heating with a thermal hysteresis of 20 K. The transition between different CDW periods occurs over a temperature range of 30 K, slightly larger than the width of the thermal hysteresis. A comparison with simulations shows that the phase transition occurs as a variation of the volume fraction of two distinct phases with well-defined periodicities. The phase of the CDW is constant for all temperatures, and we attribute it to strong pinning of the CDW by the mismatch-induced strain at the film-substrate interface.
Český abstrakt
Článek pojednává o teplotní závislosti vln nábojové hustoty v tenkých vrstvách chromu studovaných pomocí rentgenové difrakce.
Anglický abstrakt
We study the temperature dependence of the charge density wave (CDW) in a chromium thin film using x-ray diffraction. We exploit the interference between the CDW satellite peaks and Laue oscillations to determine the amplitude, the phase, and the period of the CDW. We find discrete half-integer periods of CDW in the film and switching of the number of periods by one upon cooling/heating with a thermal hysteresis of 20 K. The transition between different CDW periods occurs over a temperature range of 30 K, slightly larger than the width of the thermal hysteresis. A comparison with simulations shows that the phase transition occurs as a variation of the volume fraction of two distinct phases with well-defined periodicities. The phase of the CDW is constant for all temperatures, and we attribute it to strong pinning of the CDW by the mismatch-induced strain at the film-substrate interface.
Klíčová slova česky
Vlny nábojové hustoty; Chrom; Fázová přeměna; Tenké vrstvy; Rentgenová difrakce
Klíčová slova anglicky
Charge density waves; Chromium; Phase transition; Thin Films; X-ray diffraction
Vydáno
16.11.2016
ISSN
1098-0121
Ročník
94
Číslo
17
Strany od–do
174110-1–174110-5
Počet stran
5
BIBTEX
@article{BUT133852,
author="Andrej {Singer} and Sheena K. K. {Patel} and Vojtěch {Uhlíř} and Roopali {Kukreja} and Andrew {Ulvestad} and Eric {Dufresne} and Alec R. {Sandy} and E.E. {Fullerton} and Oleg {Shpyrko},
title="Phase coexistence and pinning of charge density waves by interfaces in chromium",
year="2016",
volume="94",
number="17",
month="November",
pages="174110-1--174110-5",
issn="1098-0121"
}