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Full-Text Articles in Physical Sciences and Mathematics
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, Xiaotian Wang, Guangqian Ding, Zhenxiang Cheng, Hongkuan Yuan, Xiaolin Wang, Tie Yang, Rabah Khenata, Wenhong Wang
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, Xiaotian Wang, Guangqian Ding, Zhenxiang Cheng, Hongkuan Yuan, Xiaolin Wang, Tie Yang, Rabah Khenata, Wenhong Wang
Australian Institute for Innovative Materials - Papers
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 …
Perovskite R3c Phase Agcuf3: Multiple Dirac Cones, 100% Spin Polarization And Its Thermodynamic Properties, Minquan Kuang, Tingzhou Li, Zhenxiang Cheng, Houari Khachai, Rabah Khenata, Tie Yang, Tingting Lin, Xiaotian Wang
Perovskite R3c Phase Agcuf3: Multiple Dirac Cones, 100% Spin Polarization And Its Thermodynamic Properties, Minquan Kuang, Tingzhou Li, Zhenxiang Cheng, Houari Khachai, Rabah Khenata, Tie Yang, Tingting Lin, Xiaotian Wang
Australian Institute for Innovative Materials - Papers
Very recently, experimentally synthesized R3c phase LaCuO3 was studied by Zhang, Jiao, Kou, Liao & Du [J. Mater. Chem. C (2018), 6, 6132-6137], and they found that this material exhibits multiple Dirac cones in its non-spin-polarized electronic structure. Motivated by this study, the focus here is on a new R3c phase material, AgCuF3, which has a combination of multiple Dirac cones and 100% spin polarization properties. Compared to the non-spin-polarized system LaCuO3, the spin-polarized Dirac behavior in AgCuF3 is intrinsic. The effects of on-site Coulomb interaction, uniform strain and spin-orbit coupling were added to examine the stability of its multiple …
Semimetal-Semiconductor Transition And Giant Linear Magnetoresistances In Three-Dimensional Dirac Semimetal Bi0.96sb0.04 Single Crystals, Zengji Yue, Xiaolin Wang, Shi-Shen Yan
Semimetal-Semiconductor Transition And Giant Linear Magnetoresistances In Three-Dimensional Dirac Semimetal Bi0.96sb0.04 Single Crystals, Zengji Yue, Xiaolin Wang, Shi-Shen Yan
Australian Institute for Innovative Materials - Papers
Three-dimensional (3D) Dirac semimetals are new quantum materials and can be viewed as 3D analogues of graphene. Many fascinating electronic properties have been proposed and realized in 3D Dirac semimetals, which demonstrate their potential applications in next generation quantum devices. Bismuth-antimony Bi1− x Sb x can be tuned from a topological insulator to a band insulator through a quantum critical point at x ≈ 4%, where 3D Dirac fermions appear. Here, we report on a magnetotransport study of Bi1− x Sb x at such a quantum critical point. An unusual magnetic-field induced semimetal-semiconductor phase transition was observed in the Bi0.96Sb0.04 …
Mass Acquisition Of Dirac Fermions In Magnetically Doped Topological Insulator Sb2te3 Films, Yeping Jiang, Canli Song, Zhi Li, Mu Chen, Richard L. Greene, Ke He, Lili Wang, Xiaowei Chen, Xu-Cun Ma, Qi-Kun Xue
Mass Acquisition Of Dirac Fermions In Magnetically Doped Topological Insulator Sb2te3 Films, Yeping Jiang, Canli Song, Zhi Li, Mu Chen, Richard L. Greene, Ke He, Lili Wang, Xiaowei Chen, Xu-Cun Ma, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
We report on the mass acquisition of Dirac fermions by doping Cr into the topmost quintuple layer or into the bulk of Sb2Te3 topological insulator films. By careful investigation of the scanning tunneling microscopy/spectroscopy on the films, we find that the Landau level spectrum keeps a good quality even at a high Cr-doping level, enabling a demonstration of deviation of the zeroth Landau level, induced by the acquisition of a mass term in the surface states in the presence of surface or bulk magnetic doping. The magnitude of the mass term in the surface states increases with increasing Cr-doping level. …