14 citations · 24 across the 11 of their papers we have counts for
11 papers
Uncovering multi-channel magnetic hopfion annihilation via a single-node, billion-spin-scale atomistic framework
Qichen Xu, Anna Delin
Modern atomistic spin simulations combine long stochastic trajectories, thermodynamic sampling, static optimization and multi-image transition-path workflows, all of which rely on…
Electronic Origin of Density Wave Orders in a Trilayer Nickelate
Jiangang Yang, Jun Zhan, Taimin Miao +24
The discovery of superconductivity in Ruddlesden-Popper nickelates has established a new frontier in the study of high-temperature superconductors. However, the underlying pairing…
A general optimization framework for mapping local transition-state networks
Qichen Xu, Anna Delin
Understanding how complex systems transition between states requires mapping the energy landscape that governs these changes. Local transition-state networks reveal the barrier arc…
Chemical disorder effects on the Gilbert damping of FeCo alloys
Zhiwei Lu, I. P. Miranda, Simon Streib +8
The impact of the local chemical environment on the Gilbert damping in the binary alloy FeCo is investigated, using computations based on density functional theory.…
Design of 2D Skyrmionic Metamaterial Through Controlled Assembly
Qichen Xu, Zhuanglin Shen, Alexander Edström +7
Despite extensive research on magnetic skyrmions and antiskyrmions, a significant challenge remains in crafting nontrivial high-order skyrmionic textures with varying, or even tail…
SpinView: General Interactive Visual Analysis Tool for Multiscale Computational Magnetism
Qichen Xu, Olle Eriksson, Anna Delin
Multiscale magnetic simulations, including micromagnetic and atomistic spin dynamics simulations, are widely used in the study of complex magnetic systems over a wide range of spat…
Metaheuristic conditional neural network for harvesting skyrmionic metastable states
Qichen Xu, I. P. Miranda, Manuel Pereiro +8
We present a metaheuristic conditional neural-network-based method aimed at identifying physically interesting metastable states in a potential energy surface of high rugosity. To…
Genetic-tunneling driven energy optimizer for spin systems
Qichen Xu, Zhuanglin Shen, Manuel Pereiro +3
A long-standing and difficult problem in, e.g., condensed matter physics is how to find the ground state of a complex many-body system where the potential energy surface has a larg…
A posteriori error bounds for the block-Lanczos method for matrix function approximation
Qichen Xu, Tyler Chen
We extend the error bounds from [SIMAX, Vol. 43, Iss. 2, pp. 787-811 (2022)] for the Lanczos method for matrix function approximation to the block algorithm. Numerical experiments…
Tuning skyrmions in B20 compounds by 4d and 5d doping
Vladislav Borisov, Qichen Xu, Nikolaos Ntallis +10
Skyrmion stabilization in novel magnetic systems with the B20 crystal structure is reported here, primarily based on theoretical results. The focus is on the effect of alloying on…
Stability Engineering of Halide Perovskite via Machine Learning
Zhenzhu Li, Qichen Xu, Qingde Sun +2
Perovskite stability is of the core importance and difficulty in current research and application of perovskite solar cells. Nevertheless, over the past century, the formability an…