Spin-orbit coupled spin-polarised hole gas at the CrSe2-terminated surface of AgCrSe2

Gesa R. Siemann, Seo Jin Kim, Edgar Abarca Morales, Philip A.E. Murgatroyd, Andela Zivanovic, Brendan Edwards, Igor Marković, Federico Mazzola, Liam Trzaska, Oliver J. Clark, Chiara Bigi, Haijing Zhang, Barat Achinuq, Thorsten Hesjedal, Matthew D. Watson, Timur K. Kim, Peter Bencok, Gerrit van der Laan, Craig M. Polley, Mats LeanderssonHanna Fedderwitz, Khadiza Ali, Thiagarajan Balasubramanian, Marcus Schmidt, Michael Baenitz, Helge Rosner, Phil D.C. King

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review


In half-metallic systems, electronic conduction is mediated by a single spin species, offering enormous potential for spintronic devices. Here, using microscopic-area angle-resolved photoemission, we show that a spin-polarised two-dimensional hole gas is naturally realised in the polar magnetic semiconductor AgCrSe2 by an intrinsic self-doping at its CrSe2-terminated surface. Through comparison with first-principles calculations, we unveil a striking role of spin-orbit coupling for the surface hole gas, unlocked by both bulk and surface inversion symmetry breaking, suggesting routes for stabilising complex magnetic textures in the surface layer of AgCrSe2.

Tidskriftnpj Quantum Materials
StatusPublished - 2023 dec.

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  • Den kondenserade materiens fysik


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