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  1. Artikel ; Online: Local inversion-symmetry breaking in a bismuthate high-T

    Griffitt, S / Spaić, M / Joe, J / Anderson, Z W / Zhai, D / Krogstad, M J / Osborn, R / Pelc, D / Greven, M

    Nature communications

    2023  Band 14, Heft 1, Seite(n) 845

    Abstract: The doped perovskite ... ...

    Abstract The doped perovskite BaBiO
    Sprache Englisch
    Erscheinungsdatum 2023-02-15
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-36348-9
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Unconventional short-range structural fluctuations in cuprate superconductors.

    Pelc, D / Spieker, R J / Anderson, Z W / Krogstad, M J / Biniskos, N / Bielinski, N G / Yu, B / Sasagawa, T / Chauviere, L / Dosanjh, P / Liang, R / Bonn, D A / Damascelli, A / Chi, S / Liu, Y / Osborn, R / Greven, M

    Scientific reports

    2022  Band 12, Heft 1, Seite(n) 20483

    Abstract: The interplay between structural and electronic degrees of freedom in complex materials is the subject of extensive debate in physics and materials science. Particularly interesting questions pertain to the nature and extent of pre-transitional short- ... ...

    Abstract The interplay between structural and electronic degrees of freedom in complex materials is the subject of extensive debate in physics and materials science. Particularly interesting questions pertain to the nature and extent of pre-transitional short-range order in diverse systems ranging from shape-memory alloys to unconventional superconductors, and how this microstructure affects macroscopic properties. Here we use neutron and X-ray diffuse scattering to uncover universal structural fluctuations in La
    Sprache Englisch
    Erscheinungsdatum 2022-11-28
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-22150-y
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Enhanced superconductivity and ferroelectric quantum criticality in plastically deformed strontium titanate.

    Hameed, S / Pelc, D / Anderson, Z W / Klein, A / Spieker, R J / Yue, L / Das, B / Ramberger, J / Lukas, M / Liu, Y / Krogstad, M J / Osborn, R / Li, Y / Leighton, C / Fernandes, R M / Greven, M

    Nature materials

    2021  Band 21, Heft 1, Seite(n) 54–61

    Abstract: The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach using irreversible, plastic deformation of single crystals. We show that compressive ... ...

    Abstract The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach using irreversible, plastic deformation of single crystals. We show that compressive plastic deformation induces low-dimensional superconductivity well above the superconducting transition temperature (T
    Sprache Englisch
    Erscheinungsdatum 2021-10-04
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2088679-2
    ISSN 1476-4660 ; 1476-1122
    ISSN (online) 1476-4660
    ISSN 1476-1122
    DOI 10.1038/s41563-021-01102-3
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Buch ; Online: Unconventional short-range structural fluctuations in cuprate high-$T_c$ superconductors

    Pelc, D. / Spieker, R. J. / Anderson, Z. W. / Krogstad, M. J. / Biniskos, N. / Bielinski, N. G. / Yu, B. / Sasagawa, T. / Chauviere, L. / Dosanjh, P. / Liang, R. / Bonn, D. A. / Damascelli, A. / Chi, S. / Liu, Y. / Osborn, R. / Greven, M.

    2021  

    Abstract: The interplay between structural and electronic degrees of freedom in complex materials is the subject of extensive debate in physics and materials science. Particularly interesting questions pertain to the nature and extent of pre-transitional short- ... ...

    Abstract The interplay between structural and electronic degrees of freedom in complex materials is the subject of extensive debate in physics and materials science. Particularly interesting questions pertain to the nature and extent of pre-transitional short-range order in diverse systems ranging from shape-memory alloys to unconventional superconductors, and how this microstructure affects macroscopic properties. Here we use neutron and X-ray diffuse scattering to uncover universal structural fluctuations in La$_{2-x}$Sr$_x$CuO$_4$ and Tl$_2$Ba$_2$CuO$_{6+\delta}$, two cuprate superconductors with distinct point disorder effects and optimal superconducting transition temperatures. The fluctuations are present in wide doping and temperature ranges, including compositions that maintain high average structural symmetry, and they exhibit unusual, yet simple scaling behavior. The scaling regime is robust and universal, similar to the well-known critical fluctuations close to second-order phase transitions, but with a distinctly different physical origin. We relate this behavior to pre-transitional phenomena in a broad class of systems with structural and magnetic transitions, and propose an explanation based on rare structural fluctuations caused by intrinsic nanoscale inhomogeneity. We also uncover parallels with superconducting fluctuations, which indicates that the underlying inhomogeneity plays an important role in cuprate physics.

    Comment: 24 pages, 4 figures
    Schlagwörter Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Thema/Rubrik (Code) 612
    Erscheinungsdatum 2021-03-09
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  5. Buch ; Online: Ferroelectric quantum criticality and enhanced superconductivity in plastically deformed strontium titanate

    Hameed, S. / Pelc, D. / Anderson, Z. W. / Klein, A. / Spieker, R. J. / Yue, L. / Das, B. / Ramberger, J. / Lukas, M. / Liu, Y. / Krogstad, M. J. / Osborn, R. / Li, Y. / Leighton, C. / Fernandes, R. M. / Greven, M.

    2020  

    Abstract: The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach: irreversible, plastic deformation of single crystals. We show for the superconductor ... ...

    Abstract The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach: irreversible, plastic deformation of single crystals. We show for the superconductor SrTiO$_3$ that compressive plastic deformation induces low-dimensional superconductivity significantly above the superconducting transition temperature ($T_c$) of undeformed samples, with evidence of superconducting correlations at temperatures two orders of magnitude above the bulk $T_c$. The superconductivity enhancement is correlated with the appearance of self-organized dislocation structures, as revealed by diffuse neutron and X-ray scattering. We also observe signatures of deformation-induced quantum-critical ferroelectric fluctuations and inhomogeneous ferroelectric order via Raman scattering. These results suggest that the strain surrounding the self-organized dislocation structures induces local ferroelectricity and quantum-critical dynamics that strongly influence $T_c$, consistent with a theory of superconductivity enhanced by soft polar fluctuations. More broadly, our results demonstrate the promise of plastic deformation and dislocation engineering as tools to manipulate electronic properties of quantum materials.

    Comment: 6 figures, included supplement
    Schlagwörter Condensed Matter - Superconductivity ; Condensed Matter - Materials Science
    Erscheinungsdatum 2020-05-01
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

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