coin-cell-battery-chamber-design-for-low-temperature-operando

Coin Cell Battery Chamber Design for Low-temperature Operando Experiments

As we become more reliant on the rechargeable batteries that power our devices, it is becoming increasingly important to understand the capacity and ...

Swarthmore College

The physics of mutual interaction of phonon quasiparticles with electronic spin degrees of freedom, leading to unusual transport phenomena of spin and heat, has been a subject of continuing interests for decades. Despite its pivotal role in transport processes, the effect of spin-phonon coupling on the phonon system, especially acoustic phonon properties, has so far been elusive. By means of inelastic neutron scattering and first-principles calculations, anomalous scattering spectral intensity from acoustic phonons was identified in the exemplary collinear antiferromagnetic nickel (II) oxide, unveiling strong spin-lattice correlations that renormalize the polarization of acoustic phonon. In particular, a clear magnetic scattering signature of the measured neutron scattering intensity from acoustic phonons is demonstrated by its momentum transfer and temperature dependences. The anomalous scattering intensity is successfully modeled with a modified magneto-vibrational scattering cross-section, suggesting the presence of spin precession driven by phonon. The renormalization of phonon eigenvector is indicated by the observed "geometry-forbidden" neutron scattering intensity from transverse acoustic phonon. Importantly, the eigenvector renormalization cannot be explained by magnetostriction but instead, it could result from the coupling between phonon and local magnetization of ions.

Mutual spin-phonon driving effects and phonon eigenvector renormalization in nickel (II) oxide.

Engaging undergraduate students in neutron scattering experiments through beamtime trips, student internships, or class visits is a powerful driver of scientific progress in the United States. These experiences provide hands-on exposure to advanced instrumentation, mentorship from diverse scientists, and insight into large-scale research infrastructure. By contributing meaningfully to proposal development, sample preparation, data collection, and data analysis, students develop confidence, scientific identity, and a sense of belonging, particularly those from underrepresented backgrounds. Early engagement cultivates a skilled and motivated scientific workforce, strengthens the capabilities and mission of national laboratories, and ensures continued U.S. leadership in discovery and innovation.

Article	Year
Mutual spin-phonon driving effects and phonon eigenvector renormalization in nickel (II) oxide. Proceedings of the National Academy of Sciences of the United States of America\| PubMed ID: 35858352	2022
Undergraduate Engagement in Neutron Scattering as a Pathway to U.S. Competitiveness and a Diverse Scientific Workforce. ACS omega\| PubMed ID: 41658136	2026

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