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Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor.

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Title: Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor.
Authors: Campi, G., Bianconi, A., Poccia, N., Bianconi, G., Barba, L., Arrighetti, G., Innocenti, D., Karpinski, J., Zhigadlo, N. D., Kazakov, S. M., Burghammer, M., Zimmermann, M. v., Sprung, M., Ricci, A.
Source: Nature. 9/17/2015, Vol. 525 Issue 7569, p359-362. 4p. 3 Graphs.
Subjects: High temperature superconductivity, Charge density waves, Quenched disorder (Quantum mechanics), Inhomogeneous materials, X-ray diffraction, Probability density function, Nanoscience, Superconductivity, Charts, diagrams, etc.
Abstract: It has recently been established that the high-transition-temperature (high-Tc) superconducting state coexists with short-range charge-density-wave order and quenched disorder arising from dopants and strain. This complex, multiscale phase separation invites the development of theories of high-temperature superconductivity that include complexity. The nature of the spatial interplay between charge and dopant order that provides a basis for nanoscale phase separation remains a key open question, because experiments have yet to probe the unknown spatial distribution at both the nanoscale and mesoscale (between atomic and macroscopic scale). Here we report micro X-ray diffraction imaging of the spatial distribution of both short-range charge-density-wave 'puddles' (domains with only a few wavelengths) and quenched disorder in HgBa2CuO4 + y, the single-layer cuprate with the highest Tc, 95 kelvin (refs 26, 27, 28). We found that the charge-density-wave puddles, like the steam bubbles in boiling water, have a fat-tailed size distribution that is typical of self-organization near a critical point. However, the quenched disorder, which arises from oxygen interstitials, has a distribution that is contrary to the usually assumed random, uncorrelated distribution. The interstitial-oxygen-rich domains are spatially anticorrelated with the charge-density-wave domains, because higher doping does not favour the stripy charge-density-wave puddles, leading to a complex emergent geometry of the spatial landscape for superconductivity. [ABSTRACT FROM AUTHOR]
Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Inhomogeneity of charge-density-wave order and quenched disorder in a high-T<subscript>c</subscript> superconductor.
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  Data: <searchLink fieldCode="AR" term="%22Campi%2C+G%2E%22">Campi, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Bianconi%2C+A%2E%22">Bianconi, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Poccia%2C+N%2E%22">Poccia, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Bianconi%2C+G%2E%22">Bianconi, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Barba%2C+L%2E%22">Barba, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Arrighetti%2C+G%2E%22">Arrighetti, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Innocenti%2C+D%2E%22">Innocenti, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Karpinski%2C+J%2E%22">Karpinski, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Zhigadlo%2C+N%2E+D%2E%22">Zhigadlo, N. D.</searchLink><br /><searchLink fieldCode="AR" term="%22Kazakov%2C+S%2E+M%2E%22">Kazakov, S. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Burghammer%2C+M%2E%22">Burghammer, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Zimmermann%2C+M%2E+v%2E%22">Zimmermann, M. v.</searchLink><br /><searchLink fieldCode="AR" term="%22Sprung%2C+M%2E%22">Sprung, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Ricci%2C+A%2E%22">Ricci, A.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 9/17/2015, Vol. 525 Issue 7569, p359-362. 4p. 3 Graphs.
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  Data: It has recently been established that the high-transition-temperature (high-Tc) superconducting state coexists with short-range charge-density-wave order and quenched disorder arising from dopants and strain. This complex, multiscale phase separation invites the development of theories of high-temperature superconductivity that include complexity. The nature of the spatial interplay between charge and dopant order that provides a basis for nanoscale phase separation remains a key open question, because experiments have yet to probe the unknown spatial distribution at both the nanoscale and mesoscale (between atomic and macroscopic scale). Here we report micro X-ray diffraction imaging of the spatial distribution of both short-range charge-density-wave 'puddles' (domains with only a few wavelengths) and quenched disorder in HgBa2CuO4 + y, the single-layer cuprate with the highest Tc, 95 kelvin (refs 26, 27, 28). We found that the charge-density-wave puddles, like the steam bubbles in boiling water, have a fat-tailed size distribution that is typical of self-organization near a critical point. However, the quenched disorder, which arises from oxygen interstitials, has a distribution that is contrary to the usually assumed random, uncorrelated distribution. The interstitial-oxygen-rich domains are spatially anticorrelated with the charge-density-wave domains, because higher doping does not favour the stripy charge-density-wave puddles, leading to a complex emergent geometry of the spatial landscape for superconductivity. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Quenched disorder (Quantum mechanics)
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