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R3c-type LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) half-metals with multiple Dirac cones: a potential class of advanced spintronic materials

Journal Article


Abstract


  • In the past three years, Dirac half-metals (DHMs) have attracted considerable attention and become a high-profile topic in spintronics becuase of their excellent physical properties such as 100% spin polarization and massless Dirac fermions. Two-dimensional DHMs proposed recently have not yet been experimentally synthesized and thus remain theoretical. As a result, their characteristics cannot be experimentally confirmed. In addition, many theoretically predicted Dirac materials have only a single cone, resulting in a nonlinear electromagnetic response with insufficient intensity and inadequate transport carrier efficiency near the Fermi level. Therefore, after several attempts, we have focused on a novel class of DHMs with multiple Dirac crossings to address the above limitations. In particular, we direct our attention to three-dimensional bulk materials. In this study, the discovery via first principles of an experimentally synthesized DHM LaNiO3 with many Dirac cones and complete spin polarization near the Fermi level is reported. It is also shown that the crystal structures of these materials are strongly correlated with their physical properties. The results indicate that many rhombohedral materials with the general formula LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) in the space group R 3 c are potential DHMs with multiple Dirac cones.

Authors


  •   Wang, Xiaotian (external author)
  •   Ding, Guangqian (external author)
  •   Cheng, Zhenxiang
  •   Yuan, Hongkuan (external author)
  •   Wang, Xiaolin
  •   Yang, Tie (external author)
  •   Khenata, Rabah (external author)
  •   Wang, Wenhong (external author)

Publication Date


  • 2019

Published In


Citation


  • Wang, X., Ding, G., Cheng, Z., Yuan, H., Wang, X., Yang, T., Khenata, R. & Wang, W. (2019). R3c-type LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) half-metals with multiple Dirac cones: a potential class of advanced spintronic materials. IUCrJ, 6 990-995.

Scopus Eid


  • 2-s2.0-85074586309

Number Of Pages


  • 5

Start Page


  • 990

End Page


  • 995

Volume


  • 6

Place Of Publication


  • United Kingdom

Abstract


  • In the past three years, Dirac half-metals (DHMs) have attracted considerable attention and become a high-profile topic in spintronics becuase of their excellent physical properties such as 100% spin polarization and massless Dirac fermions. Two-dimensional DHMs proposed recently have not yet been experimentally synthesized and thus remain theoretical. As a result, their characteristics cannot be experimentally confirmed. In addition, many theoretically predicted Dirac materials have only a single cone, resulting in a nonlinear electromagnetic response with insufficient intensity and inadequate transport carrier efficiency near the Fermi level. Therefore, after several attempts, we have focused on a novel class of DHMs with multiple Dirac crossings to address the above limitations. In particular, we direct our attention to three-dimensional bulk materials. In this study, the discovery via first principles of an experimentally synthesized DHM LaNiO3 with many Dirac cones and complete spin polarization near the Fermi level is reported. It is also shown that the crystal structures of these materials are strongly correlated with their physical properties. The results indicate that many rhombohedral materials with the general formula LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) in the space group R 3 c are potential DHMs with multiple Dirac cones.

Authors


  •   Wang, Xiaotian (external author)
  •   Ding, Guangqian (external author)
  •   Cheng, Zhenxiang
  •   Yuan, Hongkuan (external author)
  •   Wang, Xiaolin
  •   Yang, Tie (external author)
  •   Khenata, Rabah (external author)
  •   Wang, Wenhong (external author)

Publication Date


  • 2019

Published In


Citation


  • Wang, X., Ding, G., Cheng, Z., Yuan, H., Wang, X., Yang, T., Khenata, R. & Wang, W. (2019). R3c-type LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) half-metals with multiple Dirac cones: a potential class of advanced spintronic materials. IUCrJ, 6 990-995.

Scopus Eid


  • 2-s2.0-85074586309

Number Of Pages


  • 5

Start Page


  • 990

End Page


  • 995

Volume


  • 6

Place Of Publication


  • United Kingdom