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Title: Superconductivity-Insensitive Order at q 1 / 4 in Electron-Doped Cuprates

Abstract

One of the central questions in the cuprate research is the nature of the ‘normal state’ which develops into high temperature superconductivity (HTSC). In the normal state of hole-doped cuprates, the existence of charge density wave (CDW) is expected to shed light on the mechanism of HTSC. With evidence emerging for CDW order in the electron-doped cuprates, the CDW would be thought to be a universal phenomenon in high-Tc cuprates. However, the CDW phenomena in electron-doped cuprate are quite different than those in hole-doped cuprates. Here we study the nature of the putative CDW in an electron-doped cuprate through direct comparisons between as-grown and post-annealed Nd1.86Ce0.14CuO4 (NCCO) single crystals using Cu L3-edge resonant soft x-ray scattering (RSXS) and angleresolved photoemission spectroscopy (ARPES). The RSXS result reveals that the non-superconducting NCCO shows the same reflections at the wavevector (~1/4, 0, l) as like the reported superconducting NCCO. This superconductivity-insensitivesignal is quite different with the characteristics of the CDW reflection in hole-doped cuprates. Moreover, the ARPES result suggests that the fermiology cannot account for such wavevector. Furthermore, these results call into question the universality of CDW phenomenon in the cuprates.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1413817
Alternate Identifier(s):
OSTI ID: 1410407
Grant/Contract Number:  
AC02-76SF00515; FG02-99ER45772
Resource Type:
Published Article
Journal Name:
Physical Review X
Additional Journal Information:
Journal Name: Physical Review X Journal Volume: 7 Journal Issue: 4; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Jang, H., Asano, S., Fujita, M., Hashimoto, M., Lu, D. H., Burns, C. A., Kao, C. -C., and Lee, J. -S. Superconductivity-Insensitive Order at q ∼ 1 / 4 in Electron-Doped Cuprates. United States: N. p., 2017. Web. doi:10.1103/PhysRevX.7.041066.
Jang, H., Asano, S., Fujita, M., Hashimoto, M., Lu, D. H., Burns, C. A., Kao, C. -C., & Lee, J. -S. Superconductivity-Insensitive Order at q ∼ 1 / 4 in Electron-Doped Cuprates. United States. doi:10.1103/PhysRevX.7.041066.
Jang, H., Asano, S., Fujita, M., Hashimoto, M., Lu, D. H., Burns, C. A., Kao, C. -C., and Lee, J. -S. Fri . "Superconductivity-Insensitive Order at q ∼ 1 / 4 in Electron-Doped Cuprates". United States. doi:10.1103/PhysRevX.7.041066.
@article{osti_1413817,
title = {Superconductivity-Insensitive Order at q ∼ 1 / 4 in Electron-Doped Cuprates},
author = {Jang, H. and Asano, S. and Fujita, M. and Hashimoto, M. and Lu, D. H. and Burns, C. A. and Kao, C. -C. and Lee, J. -S.},
abstractNote = {One of the central questions in the cuprate research is the nature of the ‘normal state’ which develops into high temperature superconductivity (HTSC). In the normal state of hole-doped cuprates, the existence of charge density wave (CDW) is expected to shed light on the mechanism of HTSC. With evidence emerging for CDW order in the electron-doped cuprates, the CDW would be thought to be a universal phenomenon in high-Tc cuprates. However, the CDW phenomena in electron-doped cuprate are quite different than those in hole-doped cuprates. Here we study the nature of the putative CDW in an electron-doped cuprate through direct comparisons between as-grown and post-annealed Nd1.86Ce0.14CuO4 (NCCO) single crystals using Cu L3-edge resonant soft x-ray scattering (RSXS) and angleresolved photoemission spectroscopy (ARPES). The RSXS result reveals that the non-superconducting NCCO shows the same reflections at the wavevector (~1/4, 0, l) as like the reported superconducting NCCO. This superconductivity-insensitivesignal is quite different with the characteristics of the CDW reflection in hole-doped cuprates. Moreover, the ARPES result suggests that the fermiology cannot account for such wavevector. Furthermore, these results call into question the universality of CDW phenomenon in the cuprates.},
doi = {10.1103/PhysRevX.7.041066},
journal = {Physical Review X},
number = 4,
volume = 7,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevX.7.041066

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