Clay weekly context brief for the Condensed Matter category (ISO week 2026-W29).

Clay tracks publications from the Condensed Matter feed list. Below are recent items from this category, each with its source and a short description of what the publication covers when one is available in the source feed.

Recent publications:
1. Decoupling Josephson Coupling and Supercurrent Nonreciprocity in Twisted NbSe2/NbSe2 van der Waals Junctions
   Source: cond-mat.supr-con (Superconductivity)
   Link: https://arxiv.org/abs/2607.06304
   The microscopic origin of supercurrent nonreciprocity in van der Waals Josephson junctions remains under active debate, particularly regarding the role of twist-angle engineering in layered superconductors.
2. Mean first passage time of chiral active Brownian particles
   Source: cond-mat.soft (Soft Condensed Matter)
   Link: https://arxiv.org/abs/2605.23095
   Chiral active Brownian particles (CABPs) are self-propelled agents with intrinsic rotational dynamics, giving rise to circular trajectories commonly observed in biological and synthetic microswimmers.
3. Physics-grounded generative design of inherently stable, novel and controllable crystal structures
   Source: cond-mat.mtrl-sci (Materials Science)
   Link: https://arxiv.org/abs/2507.19307
   Generative inverse design is reshaping the discovery of functional crystalline materials.
4. Complete measurement of tunnel- and valley-coupling parameters in a silicon double quantum dot
   Source: cond-mat.mes-hall (Mesoscale and Nanoscale Physics)
   Link: https://arxiv.org/abs/2607.09638
   Tunneling is essential in the initialization, measurement, and control of quantum dot qubits.
5. Statistics of correlations in nonlinear recurrent neural networks
   Source: cond-mat.dis-nn (Disordered Systems and Neural Networks)
   Link: https://arxiv.org/abs/2510.21742
   The statistics of correlations are central quantities characterizing the collective dynamics of recurrent neural networks.
6. Fermi-surface-sheet dependent electron-phonon coupling in a borocarbide superconductor YNi$_2$B$_2$C
   Source: cond-mat.supr-con (Superconductivity)
   Link: https://arxiv.org/abs/2601.01700
   We performed de Haas-van Alphen (dHvA) oscillation measurements and band-structure calculations for YNi$_2$B$_2$C.
7. Densely packed particle raft at vertically vibrated air-water interface
   Source: cond-mat.soft (Soft Condensed Matter)
   Link: https://arxiv.org/abs/2602.17539
   We investigate the dynamics of a dense raft of millimeter-sized granular particles at a vertically vibrated air-water interface, which displays a rich set of patterns and particle dynamics as we vary the vibration amplitude, frequency, and particle packing fraction.
8. Growth of Highly Conductive PtSe2 Films Controlled by Raman Metrics for High-Frequency Photodetectors and Optoelectronic Mixers at 1.55 {\mu}m
   Source: cond-mat.mtrl-sci (Materials Science)
   Link: https://arxiv.org/abs/2503.20659
   Two-dimensional PtSe2 exhibits outstanding intrinsic properties such as high carrier mobility, tunable bandgap, broadband absorption and air stability, making it ideal for (opto)electronic applications.
9. Superconducting singlet-triplet qubits
   Source: cond-mat.mes-hall (Mesoscale and Nanoscale Physics)
   Link: https://arxiv.org/abs/2607.09508
   Hybrid devices integrating quantum dots with Josephson junctions are gaining interest because they combine spin-based quantum computing with circuit quantum electrodynamics (circuit QED) methods.
10. Delayed Arm Retraction Controls the Nonlinear Oscillatory Response of Long-Chain-Branched Polymer Melts
   Source: cond-mat.dis-nn (Disordered Systems and Neural Networks)
   Link: https://arxiv.org/abs/2607.09561
   Long-chain branching profoundly modifies the nonlinear oscillatory response of entangled polymer melts by introducing arm-retraction pathways absent in linear polymers.
11. Microwave Response of Superconductors with Paramagnetic Impurities
   Source: cond-mat.supr-con (Superconductivity)
   Link: https://arxiv.org/abs/2512.20565
   We develop theoretical methods to predict the effects of paramagnetic impurities on the microwave response of conventional spin-singlet superconductors.
12. Living droplets with mesoscale swimmers
   Source: cond-mat.soft (Soft Condensed Matter)
   Link: https://arxiv.org/abs/2509.20005
   We study the activity of 'living' droplets, which confine tens of swimming meso-organisms in 3D using a superhydrophobic substrate.
13. Anisotropic Superconductivity with Enhanced Critical Field in Strained RuO2
   Source: cond-mat.mtrl-sci (Materials Science)
   Link: https://arxiv.org/abs/2607.09437
   The superconductivity in RuO2 emerges under strain.
14. Action-Factored Multi-Agent Reinforcement Learning for Scalable Quantum Device Tuning
   Source: cond-mat.mes-hall (Mesoscale and Nanoscale Physics)
   Link: https://arxiv.org/abs/2607.09422
   Cooperative multi-agent reinforcement learning is well suited to problems with large parameter spaces and exploitable local structure, such as the tuning of electrostatically-defined quantum-dot arrays.
15. A multi-ensemble mean-field reduction method for networks of globally coupled phase oscillators with arbitrary parameter distributions
   Source: cond-mat.dis-nn (Disordered Systems and Neural Networks)
   Link: https://arxiv.org/abs/2607.09516
   Understanding the dynamical properties of coupled phase oscillator systems with heterogeneous oscillator frequencies has been a long-standing challenge of complex systems theory.
16. Composite Superconducting Orders and Magnetism in CeRh$_2$As$_2$
   Source: cond-mat.supr-con (Superconductivity)
   Link: https://arxiv.org/abs/2506.08097
   Locally noncentrosymmetric materials are attracting significant attention due to the unique phenomena associated with sublattice degrees of freedom.
17. Path-dependency and emergent computing under vectorial driving
   Source: cond-mat.soft (Soft Condensed Matter)
   Link: https://arxiv.org/abs/2503.07764
   The sequential response of frustrated materials-ranging from crumpled sheets and amorphous media to metamaterials-reveals their memory effects and emergent computational potential.
18. Short-range magnetic order and multi-stage phase transitions in the easy-plane van der Waals magnet CrCl$_3$
   Source: cond-mat.mtrl-sci (Materials Science)
   Link: https://arxiv.org/abs/2607.09421
   We investigate the evolution of spin correlations and the nature of the multi-stage magnetic transition in the quasi-two-dimensional easy-plane van der Waals magnet $\rm CrCl_3$.
19. Quantum phases in endofullerene zigzag chains
   Source: cond-mat.mes-hall (Mesoscale and Nanoscale Physics)
   Link: https://arxiv.org/abs/2607.09396
   We employ large-scale density matrix renormalization group calculations to study the quantum phases of dipolar molecules confined in bent (zigzag) endofullerene chains, as a function of the chain angle $\gamma$.

Sources in this brief: cond-mat.dis-nn (Disordered Systems and Neural Networks); cond-mat.mes-hall (Mesoscale and Nanoscale Physics); cond-mat.mtrl-sci (Materials Science); cond-mat.soft (Soft Condensed Matter); cond-mat.supr-con (Superconductivity).
Selected 19 of 61 available items for this weekly brief.