cond-mat.supr-con

Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBa$_2$CuO$_{4+δ}$

This study reveals that compressive strain along the $a$-axis in underdoped HgBa$_2$CuO$_{4+\delta}$ induces a significant elongation of the Cu-O bond and generates a strain-driven, nearly commensurate two-dimensional charge correlation with a wave vector near (0.5, 0, 0) that is independent of superconductivity and resembles resonating valence bond predictions.

Healing of topological defects while crystallizing nanocrystals

$\eta$-pairing in a two-band model of spinless fermions

This paper proposes that a two-band model of spinless fermions with two-particle hybridization can generate effective attractive interactions leading to $\eta$-pairing and $p$-wave superconductivity, offering a potential explanation for high-temperature superconductivity observed in hydrogen-rich materials under high pressure.

Intertwined charge density wave, tunable anti-dome superconductivity, and topological states in kagome metal VSn

This study predicts the novel 1:1 kagome metal VSn as an intrinsic charge density wave material that, under pressure or doping, exhibits a rare anti-dome-shaped superconductivity intertwined with topological states and a reentrant CDW phase, offering a promising platform for exploring multi-phase quantum correlations and designing topological superconducting metals.

Controlled Manipulation of Intermediate State in a Type-I Superconductor

Using low-temperature magnetic force microscopy on high-purity tantalum, this study achieves direct imaging and active manipulation of flux structures in type-I superconductors, revealing topological hysteresis and demonstrating reversible dynamic reconfigurations like stripe-grid transitions under AC excitation.

Pairing mechanism and superconductivity in 1313 phase La$_3$Ni$_2$O$_7$

Using DFT+DMFT and RPA methods, this study reveals that superconductivity in pressurized 1313-phase La$_3$Ni$_2$O$_7$ originates from its metallic trilayer subsystem with $s^{\pm}$-wave pairing, while its critical temperature is significantly suppressed by hole doping and interlayer Josephson coupling through insulating single-layer bridges, suggesting that the high-$T_c$ phase in this family actually belongs to the 2222 structure rather than the 1313 phase.

Superconductivity induced by altermagnetic spin fluctuations in high-pressure MnB$_4$

This paper proposes that the unexpectedly high critical temperature observed in high-pressure MnB$_4$ is driven by altermagnetic spin fluctuations rather than conventional electron-phonon coupling, leading to an extended-$s$ pairing symmetry.

Two-gap to Single-gap Transition and Two-dome-like Superconductivity in Alkali-Metal Intercalated Bilayer PdTe2

This study utilizes first-principles calculations to demonstrate that alkali-metal intercalation in bilayer PdTe2 significantly enhances superconductivity through a two-dome-like evolution of the transition temperature and a distinct two-gap to single-gap transition driven by interlayer coupling modulation, while also preserving nontrivial band topology.

Effect of Mn Substitution on Superconductivity in PrFeAs(O,F): Role of Magnetic Impurities

This study demonstrates that substituting Fe with Mn in PrFeAs(O,F) acts as a potent magnetic impurity that suppresses superconductivity and induces insulating-like behavior, while also revealing the enhanced robustness of superconductivity in Pr-based systems compared to other rare-earth variants.

$3d_{z^2}$ orbital delocalization and magnetic collapse in superconducting (La,Pr)$_3$Ni$_2$O$_{7-\delta}$ films

By independently tuning strain and oxygen content in (La,Pr)$_3$Ni$_2$O$_{7-\delta}$ films, researchers identified a two-step mechanism for superconductivity driven by the delocalization of Ni $3d_{z^2}$ and O $2p_z$ orbitals, which suppresses long-range magnetic order while preserving robust short-range magnons.