Identification of Solid-Electrolyte Interphase Species by Joint Characterization of Li-ion Battery Chemistry by Mass Spectrometry and Electro-Chemical Reaction Networks

Kavli Affiliate: Kristin Persson | Summary:The formation and stability of the solid electrolyte interphase (SEI) play a central role in determining the long-term performance and safety of modern electrochemical energy storage systems. Despite decades of research, the SEI’s heterogeneous, dynamic, and multi-phase nature has defied comprehensive molecular-level characterization, creating a critical knowledge gap that limits […]


Continue.. Identification of Solid-Electrolyte Interphase Species by Joint Characterization of Li-ion Battery Chemistry by Mass Spectrometry and Electro-Chemical Reaction Networks

Flux Pumped Kerr-Free Parametric Amplifier

Kavli Affiliate: Irfan Siddiqi | Summary:We propose a flux-pumped superconducting parametric amplifier based on symmetrically threaded superconducting quantum interference devices (SQUIDs) that achieves a Kerr-free operating point under suitable drive conditions. Eliminating the Kerr nonlinearity is advantageous for quantum-limited amplification, as it mitigates unwanted distortions in squeezing and prevents degradation of both gain and quantum […]


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Consistent inclusion of triple substitutions within a coupled cluster based static quantum embedding theory

Kavli Affiliate: Birgitta Whaley | Summary:We incorporate a solver for the fragment problem with accuracy beyond coupled cluster singles and doubles (CCSD) into the previously proposed static embedding framework, MPCC. To this end, we employ a CCSDT solver for the fragment subsystem. For the environment subsystem, we construct a perturbative estimate of the triples amplitudes, […]


Continue.. Consistent inclusion of triple substitutions within a coupled cluster based static quantum embedding theory

Field-driven Ion Pairing Dynamics in Concentrated Electrolytes

Kavli Affiliate: David T. Limmer | Summary:We investigate ion pairing dynamics in electrolytes driven far from equilibrium using molecular simulations and nonequilibrium rate theory. Focusing on 0.5 M $mathrmLiPF_6$ in water and acetonitrile under uniform electric fields, we compute transition path theory observables including reactive fluxes and mean first-passage times of ion pairing. Moreover, we […]


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The impact of spurious imaginary phonon modes on thermal properties of Metal-organic Frameworks

Kavli Affiliate: Kristin Persson | Summary:Metal-organic Frameworks (MOFs) have emerged as potential candidates for direct air capture (DAC) of green house gases and water. Thermal properties of MOFs, such as their heat capacity, are used to determine the energy penalty associated with the adsorbent retrieval during the Temperature Swing Adsorption process. To aid exploration of […]


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Revealing Short- and Long-range Li-ion diffusion in Li$_2$MnO$_3$ from finite-temperature dynamical mean field theory

Kavli Affiliate: Kristin Persson | Summary:Li$_2$MnO$_3$ remains a crucial component of the Li-excess layered cathode family, $(1-x),mathrmLiMO_2 + x,mathrmLi_2MnO_3$ ($M$ = Mn, Ni, Co, dots), but its role in limiting Li-ion mobility remains under debate. Here we combine DFT+$U$, finite-temperature DMFT with a continuous-time quantum Monte Carlo impurity solver, and nudged-elastic-band (NEB) calculations to investigate […]


Continue.. Revealing Short- and Long-range Li-ion diffusion in Li$_2$MnO$_3$ from finite-temperature dynamical mean field theory

MATRIX: A Multimodal Benchmark and Post-Training Framework for Materials Science

Kavli Affiliate: Gerbrand Ceder| Summary:Scientific reasoning in materials science requires integrating multimodal experimental evidence with underlying physical theory. Existing benchmarks make it difficult to assess whether incorporating visual experimental data during post-training improves mechanism-grounded explanation reasoning beyond text-only supervision. We introduce MATRIX, a multimodal benchmark for materials science reasoning that evaluates foundational theory, research-level reasoning, […]


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Anisotropic Kitaev Spin Glass in Li$_2$Ru$_x$Ir$_1-x$O$_3$

Kavli Affiliate: James Analytis| Summary:Kitaev iridates have been proposed as candidates for realizing an elusive quantum spin liquid (QSL) state, in which strong spin-orbit coupling and bond-directional exchange generate a highly frustrated and entangled ground state. However, all physical systems proposed to host this ground state, including Li$_2$IrO$_3$, Na$_2$IrO$_3$, and RuCl$_3$, develop magnetic order at […]


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A Surface-Scaffolded Molecular Qubit

Kavli Affiliate: Paul Alivisatos | Summary:Fluorescent spin qubits are central building blocks of quantum technologies. Placing these qubits at surfaces maximizes coupling to nearby spins and fields, enabling nanoscale sensing and facilitating integration with photonic and superconducting devices. However, reducing the dimensions or size of established qubit systems without sacrificing the qubit performance or degrading […]


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diffpy.morph: Python tools for model independent comparisons between sets of 1D functions

Kavli Affiliate: Naomi Ginsberg | Summary:diffpy$.$morph addresses a need to gain scientific insights from 1D scientific spectra in model independent ways. A powerful approach for this is to take differences between pairs of spectra and look for meaningful changes that might indicate underlying chemical, structural, or other modifications. The challenge is that the difference curve […]


Continue.. diffpy.morph: Python tools for model independent comparisons between sets of 1D functions