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Title: Stripe order in superconducting La2-xBaxCuO₄ (0.095≤x≤0.155)

Abstract

The correlations between stripe order, superconductivity, and crystal structure in La2-xBaxCuO₄ single crystals have been studied by means of x-ray and neutron diffraction as well as static magnetization measurements. The derived phase diagram shows that charge stripe order (CO) coexists with bulk superconductivity in a broad range of doping around x=1/8, although the CO order parameter and correlation length fall off quickly for x≠1/8. Except for x=0.155, the onset of CO always coincides with the transition between the orthorhombic and the tetragonal or less orthorhombic low-temperature structures. The CO transition evolves from a sharp drop at low x to a more gradual transition at higher x, eventually falling below the structural phase boundary for optimum doping. With respect to the interlayer CO correlations, we find no qualitative change of the stripe stacking order as a function of doping, and in-plane and out-of-plane correlations disappear simultaneously at the transition. Similarly to the CO, the spin stripe order (SO) is also most pronounced at x=1/8. Truly static SO sets in below the CO and coincides with the first appearance of in-plane superconducting correlations at temperatures significantly above the bulk transition to superconductivity (SC). Indications that bulk SC causes a reduction of themore » spin or charge stripe order could not be identified. We argue that CO is the dominant order that is compatible with SC pairing but competes with SC phase coherence. Comparing our results with data from the literature, we find good agreement if all results are plotted as a function of x' instead of the nominal x, where x' represents an estimate of the actual Ba content, extracted from the doping dependence of the structural transition between the orthorhombic phase and the tetragonal high-temperature phase.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1100062
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Volume: 83 Journal Issue: 10; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Hücker, M., v. Zimmermann, M., Gu, G. D., Xu, Z. J., Wen, J. S., Xu, Guangyong, Kang, H. J., Zheludev, A., and Tranquada, J. M. Stripe order in superconducting La2-xBaxCuO₄ (0.095≤x≤0.155). United States: N. p., 2011. Web. doi:10.1103/PhysRevB.83.104506.
Hücker, M., v. Zimmermann, M., Gu, G. D., Xu, Z. J., Wen, J. S., Xu, Guangyong, Kang, H. J., Zheludev, A., & Tranquada, J. M. Stripe order in superconducting La2-xBaxCuO₄ (0.095≤x≤0.155). United States. doi:10.1103/PhysRevB.83.104506.
Hücker, M., v. Zimmermann, M., Gu, G. D., Xu, Z. J., Wen, J. S., Xu, Guangyong, Kang, H. J., Zheludev, A., and Tranquada, J. M. Thu . "Stripe order in superconducting La2-xBaxCuO₄ (0.095≤x≤0.155)". United States. doi:10.1103/PhysRevB.83.104506.
@article{osti_1100062,
title = {Stripe order in superconducting La2-xBaxCuO₄ (0.095≤x≤0.155)},
author = {Hücker, M. and v. Zimmermann, M. and Gu, G. D. and Xu, Z. J. and Wen, J. S. and Xu, Guangyong and Kang, H. J. and Zheludev, A. and Tranquada, J. M.},
abstractNote = {The correlations between stripe order, superconductivity, and crystal structure in La2-xBaxCuO₄ single crystals have been studied by means of x-ray and neutron diffraction as well as static magnetization measurements. The derived phase diagram shows that charge stripe order (CO) coexists with bulk superconductivity in a broad range of doping around x=1/8, although the CO order parameter and correlation length fall off quickly for x≠1/8. Except for x=0.155, the onset of CO always coincides with the transition between the orthorhombic and the tetragonal or less orthorhombic low-temperature structures. The CO transition evolves from a sharp drop at low x to a more gradual transition at higher x, eventually falling below the structural phase boundary for optimum doping. With respect to the interlayer CO correlations, we find no qualitative change of the stripe stacking order as a function of doping, and in-plane and out-of-plane correlations disappear simultaneously at the transition. Similarly to the CO, the spin stripe order (SO) is also most pronounced at x=1/8. Truly static SO sets in below the CO and coincides with the first appearance of in-plane superconducting correlations at temperatures significantly above the bulk transition to superconductivity (SC). Indications that bulk SC causes a reduction of the spin or charge stripe order could not be identified. We argue that CO is the dominant order that is compatible with SC pairing but competes with SC phase coherence. Comparing our results with data from the literature, we find good agreement if all results are plotted as a function of x' instead of the nominal x, where x' represents an estimate of the actual Ba content, extracted from the doping dependence of the structural transition between the orthorhombic phase and the tetragonal high-temperature phase.},
doi = {10.1103/PhysRevB.83.104506},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 10,
volume = 83,
place = {United States},
year = {2011},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevB.83.104506

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