Zeeman-type spin splitting in nonmagnetic three-dimensional compounds

Autor(es)

Acosta, Carlos Mera ^{[1, 2]} ; Fazzio, Adalberto ^{[1, 2]} ; Dalpian, Gustavo M. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC, Ctr Nat & Human Sci, BR-09210580 Santo Andre, SP - Brazil

^[2] CNPEM, Brazilian Nanotechnol Natl Lab, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NPJ QUANTUM MATERIALS; v. 4, AUG 7 2019.
• Citações Web of Science: 3

Resumo

Despite its potential for device application, the nonmagnetic Zeeman effect has only been predicted and observed in two-dimensional compounds. We demonstrate that noncentrosymmetric three-dimensional compounds can also exhibit a Zeeman-type spin splitting, allowing the splitting control by changing the growth direction of slabs formed by these compounds. We determine the required conditions for this effect: (i) noncentrosymmetric including polar and nonpolar point groups, (ii) valence band maximum or conduction band minimum in a generic k-point, i.e., non-time-reversal-invariant momentum, and (iii) zero magnetic moment. Using these conditions as filters, we perform a material screening to systematically search for these systems in the AFLOW-ICSD database. We find 20 candidates featuring the Zeeman-type effect. We also find that the spin splitting in confined systems can be controlled by an external electric field, which in turns can induce a metal-insulator transition. We believe that this work will open the way for the discovery of novel fundamental effects related to the spin polarization control. (AU)

• Processo FAPESP: 18/11856-7 - Efeitos induzidos por interfaces em materiais quânticos
• Beneficiário: Carlos Augusto Mera Acosta
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/02317-2 - Interfaces em materiais: propriedades eletrônicas, magnéticas, estruturais e de transporte
• Beneficiário: Adalberto Fazzio
• Modalidade de apoio: Auxílio à Pesquisa - Temático