Structural flexibility of cuprate superconductors
Kostya Trachenko
TL;DR
This paper investigates the Rigid Unit Mode (RUM) in cuprate superconductors, exploring its role in correlated vibrations within the CuO₂ plane and potential implications for superconductivity.
Contribution
It introduces the concept of RUM in cuprates and analyzes its temperature-dependent behavior and possible connection to superconductivity.
Findings
Identification of RUM as a low-energy vibrational mode in CuO₂ planes
Correlation between RUM activity and temperature decrease
Potential relevance of RUM to the mechanism of superconductivity
Abstract
We study the lowest energy state in the CuO plane of cuprate superconductors, related to the vibration that does not involve distortions of constituent units of the plane, the Rigid Unit Mode (RUM). We discuss the correlated motion in the plane due to RUM on temperature decrease, and possible relevance of this phonon for superconductivity.
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