Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 63: Spin: Transport, Orbitronics and Hall Effects III

MA 63.2: Talk

Friday, March 20, 2020, 09:45–10:00, HSZ 403

Spin-dependent transport in Uranium — •Ming-Hung Wu, Hugo Rossignol, and Martin Gradhand — H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, United Kingdom

Uranium, a naturally occurring heavy metal with 5f-electrons, has been investigated for decades due to its complex properties.1 Despite its narrow 5f-bands, the hybridization with 6d-bands provides itinerant electrons, distinct from other 5f actinides. In combination with its strong spin-orbit coupling, uranium is a promising material for spintronic applications e.g. magnetic multilayer systems.2-5 Furthermore uranium crystallizes in a large variety of structures such as α (orthorhombic), β (bct), γ (bcc) and hcp phase, it shows superconductivity and is close to a ferromagnetic transition. In order to shed light on the complex physics in such systems, we focus on the spin-dependent transport of uranium for a variety of phases. In our ab initio calculations we analyze the intrinsic spin Hall effect as well as the extrinsic mechanism incorporating various impurities for bulk γ, hcp and α uranium. We discuss the effects of crystal structures and magnetic moments of impurities on the spin-dependent transport.

Reference 1.S. Adak, H. Nakotte, P. de Chatel, B. Kiefer, Phys. B 406, 3342 (2011). 2. Kevin T. Moore and Gerrit van der Laan, Rev. Mod. Phys. 81, 235 (2009). 3. R. Springell, F. Wilhelm, A. Rogalev, W. G. Stirling, R. C. C. Ward, M. R. Wells, S. Langridge, S. W. Zochowski, and G. H. Lander, Phys. Rev. B 77, 064423 (2008). 4. A. Laref, E. Saşioglu, L. M. Sandratskii, J. Phys.: Condens. Matter 18, 4177 (2006).