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Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2
Journal article   Open access   Peer reviewed

Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2

Anshul Kogar, Gilberto A de la Pena, Sangjun Lee, Yizhi Fang, Stella X. -L Sun, David B Lioi, Goran Karapetrov, Kenneth D Finkelstein, Jacob P. C Ruff, Peter Abbamonte, …
Physical review letters, v 118(2)
21 Aug 2016
DOI: https://doi.org/10.1103/PhysRevLett.118.027002
PMID: 28128591
url
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.704.9954View
SubmittedOpen Access (License Unspecified),  Open

Abstract

Phys. Rev. Lett. 118, 027002 (2017) X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in CuxTiSe2 as a function of copper intercalation in order to clarify the relationship between the CDW and superconductivity. The results show a CDW incommensuration arising at an intercalation value coincident with the onset of superconductivity at around x=0.055(5). Additionally, it was found that the charge density wave persists to higher intercalant concentrations than previously assumed, demonstrating that the CDW does not terminate inside the superconducting dome. A charge density wave peak was observed in samples up to x=0.091(6), the highest copper concentration examined in this study. The phase diagram established in this work suggests that charge density wave incommensuration may play a role in the formation of the superconducting state.

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Domestic collaboration
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Physics, Multidisciplinary
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