James Cullen is a postdoctoral researcher in theoretical condensed-matter physics at the School of Physics, UNSW. He completed both his undergraduate degree (2019) and PhD (2025) at UNSW, focusing on quantum-mechanical approaches to transport phenomena in topological and spin-orbit-coupled materials. His research centres on spin and orbital based transport, including spin-orbit torques, charge-to-spin and charge-to-orbital conversion, and the role of Berry curvature and quantum geometry in electronic response. James aims to advance a fundamental understanding of how electrons, spins, and orbital degrees of freedom behave in complex materials, while contributing to the design of efficient pathways for information storage and manipulation.
Cullen JH; Liu H; Culcer D, 2025, 'Giant orbital Hall effect due to the bulk states of 3D topological insulators', Npj Spintronics, 3, http://dx.doi.org/10.1038/s44306-025-00087-y
Farokhnezhad M; Cullen JH; Culcer D, 2024, 'Spin-orbit torques due to topological insulator surface states: an in-plane magnetization as a probe of extrinsic spin-orbit scattering', Journal of Physics Condensed Matter, 36, http://dx.doi.org/10.1088/1361-648X/ad43a6
Journal articles | 2024
Ma H; Cullen JH; Monir S; Rahman R; Culcer D, 2024, 'Spin-Hall effect in topological materials: evaluating the proper spin current in systems with arbitrary degeneracies', Npj Spintronics, 2, http://dx.doi.org/10.1038/s44306-024-00057-w
Journal articles | 2023
Cullen JH; Atencia RB; Culcer D, 2023, 'Spin transfer torques due to the bulk states of topological insulators', Nanoscale, 15, pp. 8437 - 8446, http://dx.doi.org/10.1039/d2nr05176a
Journal articles | 2023
Cullen JH; Culcer D, 2023, 'Spin-Hall effect due to the bulk states of topological insulators: Extrinsic contribution to the proper spin current', Physical Review B, 108, http://dx.doi.org/10.1103/PhysRevB.108.245418
Journal articles | 2023
Gholizadeh S; Cullen JH; Culcer D, 2023, 'Nonlinear Hall effect of magnetized two-dimensional spin- 32 heavy holes', Physical Review B, 107, http://dx.doi.org/10.1103/PhysRevB.107.L041301
Cullen JH; Bhalla P; Marcellina E; Hamilton AR; Culcer D, 2021, 'Generating a Topological Anomalous Hall Effect in a Nonmagnetic Conductor: An In-Plane Magnetic Field as a Direct Probe of the Berry Curvature', Physical Review Letters, 126, http://dx.doi.org/10.1103/PhysRevLett.126.256601
Journal articles | 2021
Wang Z; Marcellina E; Hamilton AR; Cullen JH; Rogge S; Salfi J; Culcer D, 2021, 'Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits', Npj Quantum Information, 7, http://dx.doi.org/10.1038/s41534-021-00386-2
Preprints | 2025
Cullen JH; Arovas DP; Raimondi R; Culcer D, 2025, Quantum geometry and dipolar dynamics in the orbital magneto-electric
effect, http://arxiv.org/abs/2505.02911v2
Ma H; Cullen JH; Monir S; Rahman R; Culcer D, 2024, Spin-Hall effect in topological materials: Evaluating the proper spin
current in systems with arbitrary degeneracies, http://dx.doi.org/10.1038/s44306-024-00057-w
Preprints | 2023
Cullen JH; Culcer D, 2023, Spin-Hall effect due to the bulk states of topological insulators:
Extrinsic contribution to the conserved spin current, http://dx.doi.org/10.1103/PhysRevB.108.245418
Preprints | 2023
Farokhnezhad M; Cullen JH; Culcer D, 2023, Spin-orbit torques due to topological insulator surface states: an in-plane magnetization as a probe of extrinsic spin-orbit scattering, http://dx.doi.org/10.48550/arxiv.2306.12557
Cullen JH; Atencia RB; Culcer D, 2022, 'Current-induced spin polarizations in the bulk of topological insulators with inhomogeneous magnetic textures', in Proceedings of SPIE the International Society for Optical Engineering, http://dx.doi.org/10.1117/12.2635768
Preprints | 2022
Cullen JH; Atencia RB; Culcer D, 2022, Spin transfer torques due to the bulk states of topological insulators, http://dx.doi.org/10.1039/D2NR05176A
