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Unconventional short-range structural fluctuations in cuprate superconductors
D Pelc1,2, R J Spieker3, Z W Anderson3
1School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA. dpelc@phy.hr.
Scientific Reports
|November 28, 2022
Summary
Researchers discovered universal structural fluctuations in cuprate superconductors using neutron and X-ray scattering. These fluctuations, linked to nanoscale inhomogeneity, impact superconducting properties and offer insights into complex materials science.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- The relationship between structural and electronic properties is crucial in complex materials.
- Understanding pre-transitional short-range order is key to explaining macroscopic behavior in systems like superconductors.
Purpose of the Study:
- To investigate universal structural fluctuations in cuprate superconductors.
- To determine the origin and scaling behavior of these fluctuations.
- To explore the role of nanoscale inhomogeneity in cuprate physics.
Main Methods:
- Neutron and X-ray diffuse scattering techniques were employed.
- Analysis focused on La2-xSrxCuO4 and Tl2Ba2CuO6+δ cuprate superconductors.
- Doping and temperature dependence of structural fluctuations were examined.
Main Results:
- Universal structural fluctuations were observed across wide doping and temperature ranges.
- These fluctuations exhibit simple, robust scaling behavior distinct from critical fluctuations.
- Evidence suggests rare structural fluctuations due to intrinsic nanoscale inhomogeneity.
Conclusions:
- The observed fluctuations are linked to pre-transitional phenomena in materials with structural and magnetic transitions.
- Intrinsic nanoscale inhomogeneity is proposed as the physical origin.
- Parallels with superconducting fluctuations highlight inhomogeneity's role in cuprate physics.
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