Universal superconducting precursor in three classes of unconventional superconductors

D. Pelc, Z. Anderson, B. Yu, C. Leighton, M. Greven

Research output: Contribution to journalArticle

Abstract

A pivotal challenge posed by unconventional superconductors is to unravel how superconductivity emerges upon cooling from the generally complex normal state. Here, we use nonlinear magnetic response, a probe that is uniquely sensitive to the superconducting precursor, to uncover remarkable universal behaviour in three distinct classes of oxide superconductors: strontium titanate, strontium ruthenate, and the cuprate high-Tc materials. We find unusual exponential temperature dependence of the diamagnetic response above the transition temperature Tc, with a characteristic temperature scale that strongly varies with Tc. We correlate this scale with the sensitivity of Tc to local stress and show that it is influenced by intentionally-induced structural disorder. The universal behaviour is therefore caused by intrinsic, self-organized structural inhomogeneity, inherent to the oxides’ perovskite-based structure. The prevalence of such inhomogeneity has far-reaching implications for the interpretation of electronic properties of perovskite-related oxides in general.

Original languageEnglish (US)
Article number2729
JournalNature communications
Volume10
Issue number1
DOIs
StatePublished - Dec 1 2019

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Oxides
Superconducting materials
Temperature scales
Oxide superconductors
strontium
Strontium
oxides
inhomogeneity
Superconductivity
Electronic properties
Temperature
temperature scales
Transition Temperature
Cooling
cuprates
superconductivity
transition temperature
disorders
cooling
temperature dependence

Cite this

Universal superconducting precursor in three classes of unconventional superconductors. / Pelc, D.; Anderson, Z.; Yu, B.; Leighton, C.; Greven, M.

In: Nature communications, Vol. 10, No. 1, 2729, 01.12.2019.

Research output: Contribution to journalArticle

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