Year: 2025
Type: article
Abstract: The doping dependence of the superfluid density ${\ensuremath{\rho}}_{\text{s}}$ exhibits distinct behaviors in the underdoping and overdoping regimes of cuprates, while the superconducting (SC) transition temperature ${T}_{c}$ generally scales with ${\ensuremath{\rho}}_{\text{s}}$. In this paper, we present a unified understanding of the superconducting transition temperature ${T}_{c}$ and ${\ensuremath{\rho}}_{\text{s}}$ across the entire doping range by incorporating the underlying mutual Chern-Simons gauge structure that couples the spin and charge degrees of freedom in a doped Mott insulator. Within this framework, the SC phase fluctuations are deeply intertwined with the spin dynamics, such that thermally excited neutral spins determine ${T}_{c}$, while quantum spin excitations effectively reduce the superfluid density at zero temperature. As a result, a Uemura-like scaling of ${T}_{c}$ vs ${\ensuremath{\rho}}_{\text{s}}$ in the underdoped regime naturally emerges, while the suppression of both ${T}_{c}$ and ${\ensuremath{\rho}}_{\text{s}}$ at overdoping is attributed to a drastic reduction of antiferromagnetic spin correlations.
DOI: 10.1103/bnd6-r3db
Authors: Zeyu Han, Zhi-Jian Song, Jia-Xin Zhang, Zheng-Yu Weng
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, National Natural Science Foundation of China, Horizon 2020 Framework Programme, Dream Project of Ministry of Science and Technology of the People's Republic of China, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, H2020 European Research Council
OpenAlex ID: W4417210206