Detail publikace

Phase coexistence and pinning of charge density waves by interfaces in chromium

SINGER, A. PATEL, S. UHLÍŘ, V. KUKREJA, R. ULVESTAD, A. DUFRESNE, E. SANDY, A. FULLERTON, E. SHPYRKO, O.

Originální název

Phase coexistence and pinning of charge density waves by interfaces in chromium

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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.

Klíčová slova

Charge density waves; Chromium; Phase transition; Thin Films; X-ray diffraction

Autoři

SINGER, A.; PATEL, S.; UHLÍŘ, V.; KUKREJA, R.; ULVESTAD, A.; DUFRESNE, E.; SANDY, A.; FULLERTON, E.; SHPYRKO, O.

Vydáno

16. 11. 2016

ISSN

1098-0121

Periodikum

PHYSICAL REVIEW B

Ročník

94

Číslo

17

Stát

Spojené státy americké

Strany od

174110-1

Strany do

174110-5

Strany počet

5

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