Tuning topological surface magnetism by bulk alloying

Klier N, Sharma S, Rost F, Pankratov O, Shallcross S (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Physical Review B American Physical Society

Book Volume: 100

Journal Issue: 7

DOI: 10.1103/PhysRevB.100.075130

Abstract

Deploying an analytical atomistic model of the bulk band structure of the IV-VI crystalline topological insulators, we connect the spin structure of the surface state to the crystal field and spin-orbit coupling parameters of the bulk material. While the Dirac-Weyl-type topological surface state is often assumed to be universal, we show that the physics of the surface state is strikingly nonuniversal, carrying a profound imprint of the bulk physics. To see this explicitly we calculate the Ruderman-Kittel-Kasuya-Yosida interaction, which may be viewed as a probe of this surface state spin structure, finding that its qualitative form depends on the values the bulk spin-orbit and crystal field parameters take. This opens the way to tune the spin interaction on the surface of a IV-VI topological insulator by, for instance, varying the composition of the IV-VI ternary compounds.

Authors with CRIS profile

Nicolas Klier Lehrstuhl für Theoretische Festkörperphysik Fabian Rost Lehrstuhl für Theoretische Festkörperphysik Oleg Pankratov Lehrstuhl für Theoretische Festkörperphysik Sam Shallcross Lehrstuhl für Theoretische Festkörperphysik

Involved external institutions

Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE)

How to cite

APA:

Klier, N., Sharma, S., Rost, F., Pankratov, O., & Shallcross, S. (2019). Tuning topological surface magnetism by bulk alloying. Physical Review B, 100(7). https://doi.org/10.1103/PhysRevB.100.075130

MLA:

Klier, Nicolas, et al. "Tuning topological surface magnetism by bulk alloying." Physical Review B 100.7 (2019).

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