June 18, 2026 – Kavli Institute Pre-Print Publications

Persistent structural distortions and absent superconductivity in trilayer nickelate thin films

Posted by klaurent June 18, 2026June 24, 2026Cornell, This Week: Nanoscience

Kavli Affiliate: David Muller | Summary:A new family of high-temperature superconductors was recently discovered in the $n=2,3$ Ruddlesden-Popper nickelates, where superconductivity emerges concomitant with suppression of parent density waves and structural octahedral rotations under hydrostatic pressure. Intriguingly, compressive strain mimics the structural effects of pressure in the $n=2$ phase, yielding ambient-pressure superconductivity. However, analogous strain-stabilized […]

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LEGGOS I: The JWST LEGGOS Survey — LEnsing and Galaxy Growth: Observing Substructures — Unpacks the Nature of Clumpy Star Formation and Quenching in Gravitationally Lensed Galaxies beyond Cosmic Noon

Posted by klaurent June 18, 2026June 24, 2026Chicago, This Week: Astrophysics

Kavli Affiliate: Michael Gladders | Summary:We present first results from the JWST LEGGOS Survey (LEnsing and Galaxy Growth: Observing Substructures), aimed at studying the physics of clumpy star formation and quenching in eight lensed galaxies at $zsim2$–4. LEGGOS combines multiple Cycle 2 JWST GO programs (GO 4125, GO 3843) and Cycle 1 archival data, and […]

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Adaptive Charge Modulation Enables Focal, Selective Spinal Cord Stimulation

Posted by dbos June 18, 2026June 24, 2026This Week: Neuroscience, UCSD / Salk

Kavli Affiliate: Eiman Azim and Mark H. Tuszynski | Authors: Ritwik Vatsyayan, Fadi Khoury, Tara S Porter, Eleni Sinopoulou, Hadi Day, Samantha Russman, Rhea Montgomery-Walsh, Kaushik Shukla, Helen Saad, Andrew M Bourhis, Jihwan Lee, Karen J Tonsfeldt, Akira Nagamori, Hoi Sang U, David M Roth, Drew Hall, Sharona Ben-Haim, Eiman Azim, Tony L. Yaksh, Alexander […]

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LEGGOS II: A Strong Lens Model and Source-Plane Projection of the Clumpy Star-Forming Galaxy SGASJ111020.0+645950.8 at z=2.48

Posted by klaurent June 18, 2026June 24, 2026Chicago, This Week: Astrophysics

Kavli Affiliate: Michael Gladders | Summary:Strong gravitational lensing by galaxy clusters combined with the resolution of JWST enables studies of star formation on ~10-100 pc scales in galaxies at z~2-4. As part of the LEnsing and Galaxy Growth: Observing Substructures survey (LEGGOS), we present an updated strong lensing model of the galaxy cluster SDSSJ1110+6459 (z=0.659), […]

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Minimal Proton-Mass Dark Matter

Posted by klaurent June 18, 2026June 24, 2026This Week: Astrophysics, Tokyo

Kavli Affiliate: Hitoshi Murayama | Summary:We present a minimal dark matter scenario: a single complex scalar carrying baryon and lepton number, with no new exact stabilizing symmetry. Its leading interaction is a dimension-7 semileptonic portal that, below confinement, generates a low-energy Yukawa coupling with the proton and electron. Requiring absolute stability of both the proton […]

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Raising the reionization optical depth with inflationary CMB features

Posted by klaurent June 18, 2026June 24, 2026Chicago, This Week: Astrophysics

Kavli Affiliate: Wayne Hu | Summary:Within the highly successful $Λ$CDM paradigm established with cosmic microwave background (CMB) anisotropy measurements, the optical depth through reionization $τ$ is the most uncertain due both to the difficulty in measuring large-angle polarization and the assumptions made in their interpretation. Currently, for the Planck primary data in the flat $Λ$CDM […]

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Breaking symmetry to create a parallel-plate varactor dielectric with unparalleled microwave performance

Posted by klaurent June 18, 2026June 24, 2026Cornell, This Week: Nanoscience

Kavli Affiliate: David Muller | Summary:Voltage-tunable capacitors (varactors) are key to microwave circuits. Tunable dielectric varactors outperform competing technologies in almost every relevant metric but usually suffer from high dielectric loss. In contrast, Ruddlesden-Popper (RPs) dielectric thin films have remarkably low microwave loss. Unfortunately, their crystallographic symmetry has until recently dictated an in-plane device structure, […]

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A Whisper from Within: Response of a Pulsar Timing Array to an Internal Gravitational-wave Source

Posted by klaurent June 18, 2026June 24, 2026Peking, This Week: Astrophysics

Kavli Affiliate: Xian Chen| Summary: Millisecond pulsars (MSPs) are abundant in globular clusters (GCs) and probably also in galactic nuclei. They offer the potential to form a miniature pulsar timing array (mini-PTA) to detect nanohertz gravitational-wave (GW) sources located inside the array. Since the size of such an array is comparable to the wavelength of […]

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The SPHEREx View of Galaxy Clusters: A Simulation-based Validation of the Forced Photometry Pipeline for Extended Sources

Posted by klaurent June 18, 2026June 24, 2026Chicago, This Week: Astrophysics

Kavli Affiliate: Lindsey Bleem | Summary:We present a simulation-driven assessment of the performance of the SPHEREx pipeline for galaxy cluster science, focusing on photometry, source blending, survey depth, and photometric redshift accuracy. To do that, we compile a sample of eight galaxy clusters spanning a wide redshift range ($z approx 0.02$-$1.1$) and develop an end-to-end […]

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