6 papers
Hedgehog lattices induced by chiral spin interactions
Ryan Mays, Predrag NikoliÄ
We analyze a classical Heisenberg spin model on the simple cubic lattice which is invariant under time reversal and contains multiple chiral spin interactions. The modelled dynamic…
Epistemoverse: Toward an AI-Driven Knowledge Metaverse for Intellectual Heritage Preservation
Predrag K. NikoliÄ, Robert Prentner
Large language models (LLMs) have often been characterized as "stochastic parrots" that merely reproduce fragments of their training data. This study challenges that assumption by…
Theory of non-resonant Raman scattering from electrons in nodal and flat bands
Predrag NikoliÄ
Raman scattering is emerging as a surprising probe of electron topology in quantum materials. It has been used recently to detect and characterize a topological phase transition th…
Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal
X. Yao, P. Chen, R. Verma +15
We demonstrate that a multi- incommensurate magnetic state in the Weyl semimetal CeAlGe gives rise to singular angular magnetoresistance (SAMR), an electrical-transport…
Magnetic excitations and interactions in the Weyl ferrimagnet NdAlSi
Chris J. Lygouras, Hung-Yu Yang, Xiaohan Yao +9
Weyl fermions can arise from time-reversal symmetry-breaking magnetism, but their impact on magnetic order is a source of ongoing research. Using high-precision neutron diffraction…
Topological order in spin nematics from the quantum melting of a disclination lattice
Predrag NikoliÄ
The topological defects of Spin() nematics in two spatial dimensions, known as disclinations, are characterized by the homotopy group for…