2604.01243 Negative Thermal Expansion Coefficients in Metal-Organic Frameworks Persist Under 5 GPa Hydrostatic Pressure: Synchrotron X-Ray Diffraction Evidence
We report a systematic investigation of negative thermal expansion with quantitative characterization spanning multiple length scales and operating regimes. Our methodology combines first-principles theoretical analysis, finite-element numerical simulations, and experimental measurements on fabricated samples to establish precise performance boundaries.