APS March Meeting 2026, Day 1

Key Takeaways

• Chiral phonons generate strong local magnetic fields.
• Cavity magnons manipulated via acoustic waves for nonreciprocal devices.
• Single-molecule phonon thermal transport measured experimentally.
• Spin fluctuations identified as pairing glue in electron‑doped cuprates.
• APS prize session highlighted community achievements.

Summary

The APS March Meeting Day 1 showcased cutting‑edge research on quantum excitations and emergent materials. Highlights included Hanyu Zhu’s demonstration of chiral phonons producing intense local magnetic fields, and talks on cavity‑magnon control using surface acoustic waves for nonreciprocal devices. Longji Cui presented the first single‑molecule phonon thermal‑transport measurements, extending the technique to polymers. Dragana Popović and Nigel Hussey reported new evidence that spin‑fluctuation scattering governs superconductivity in electron‑doped cuprates, while hole‑doped systems display distinct strange‑metal behavior. The day concluded with the APS prize ceremony honoring top contributors.

Pulse Analysis

The March Meeting spotlighted how chiral phonons—vibrational modes carrying orbital angular momentum—can act as nanoscale magnetic field generators. By coupling these phonons to electronic spins, researchers open new avenues for spintronic devices that operate without external magnets, potentially lowering power consumption in quantum information platforms. Parallel advances in magnonics, especially the use of surface acoustic waves to engineer cavity‑magnon interactions, promise nonreciprocal signal routing essential for robust quantum communication networks.

Equally transformative is the emergence of molecular phononics, where Longji Cui’s team achieved thermal‑transport measurements down to a single molecule. This breakthrough provides unprecedented insight into heat flow at the atomic scale, informing the design of molecular electronics and polymer‑based thermoelectric materials. Precise control of phonon pathways could enable devices that efficiently harvest waste heat or protect delicate quantum circuits from thermal noise.

In the realm of strongly correlated electrons, the conference revealed contrasting mechanisms behind superconductivity in cuprates. Dragana Popović’s observation of persistent vortex‑liquid fluctuations suggests that phase coherence survives well into the normal state, while Nigel Hussey’s systematic magnetoresistance studies link anisotropic spin‑fluctuation scattering to the superconducting transition in electron‑doped compounds. These insights sharpen the debate over whether spin fluctuations or strange‑metal dynamics act as the pairing “glue,” a question central to achieving higher‑temperature superconductors. The APS prize session underscored the community’s collective progress, celebrating researchers whose work drives these transformative trends.