Beyond Conventional Conductivity: Unraveling the Mysteries of Quantum Criticality
![The study of unconventional superconducting materials reveals how electrical resistivity changes with temperature, demonstrating that extrapolations to zero temperature can indicate either conventional Fermi-liquid behavior - described by [latex]\rho=\rho\_{0}+AT^{2}[/latex] - or a non-Fermi-liquid, ‘strange-metal’ state characterized by [latex]\rho=\rho\_{0}+A\_{n}T^{n}[/latex] with [latex]n<2[/latex], with the presence of a non-physical residual resistivity in some high-residual-resistivity-ratio samples suggesting a complex transition below the superconducting temperature [latex]T\_{sc}[/latex].](https://arxiv.org/html/2604.14952v1/Figure5.png)
New research scrutinizes the electrical behavior of unconventional superconductors to distinguish between intrinsic quantum phenomena and the effects of superconductivity itself.






![The differential decay rate for [latex]K^{*}\(892)\rightarrow K\ell^{+}\ell^{-}[/latex] is modeled with a pole mass defined as [latex]\Lambda=m_{\rho}[/latex], providing a foundational parameter for understanding this particle decay process.](https://arxiv.org/html/2604.14735v1/x2.png)
