scholarly journals Half-metallic ferrimagnetism driven by Coulomb-enhanced spin-orbit coupling in PdCrO3

2011 ◽  
Vol 84 (17) ◽  
Author(s):  
Hyo-Sun Jin ◽  
Kwan-Woo Lee
Keyword(s):  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Half Metallic

Investigation of Possible Half-Metallic Antiferromagnets on Double Perovskites A2BB′O6 (A=Ca, Sr Ba; B,B′=Transition Metal Elements)

2013 ◽  
Vol 13 (2) ◽  
pp. 526-539 ◽  
Author(s):  
S. H. Chen ◽  
Z. R. Xiao ◽  
Y. P. Liu ◽  
Y. K. Wang
Keyword(s):  
Transition Metal ◽  
Double Exchange ◽  
Correlation Effect ◽  
Orbit Coupling ◽  
Experimental Confirmation ◽  
Double Perovskites ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Transition Elements ◽  
Half Metallic

AbstractA search was made for possible half-metallic (HM) antiferromagnet (AFM) in all the double perovskites structures of Sr2BB'O6 where BB' pairs are any combination of 3d, 4d or 5d transition elements with the exception of La. Sr can also be replaced by Ca or Ba whenever HM-AFM was found and similar calculations were then performed in order to probe further possibilities. It was found that A2MoOsO6, A2TcReO6, A2CrRuO6, where A=Ca, Sr, Ba, are all potential candidates for HM-AFM. The AFM of A2BB'O6 comes from both the superexchange mechanism and the generalized double exchange mechanism via the B(t2g)-O2pπ-B'(t2g) coupling, With the latter also being the origin of their HM. Also considered were the effects of spin-orbit coupling (SOC) and correlation (+U) by introducing +SOC and +U corrections. It is found that the SOC effect has much less influence than the correlation effect on the HM property of the compounds. For A2TcReO6 and A2CrRuO6, after +U, they become nearly Mott-Insulators. In the future, it is hoped that there will be further experimental confirmation for these possible HM-AFM candidates.

Exotic States Emerged By Spin-Orbit Coupling, Lattice Modulation and Magnetic Field in Lieb Nano-ribbons

2019 ◽  
Vol 29 (3SI) ◽  
pp. 293 ◽  
Author(s):  
Nguyen Duong Bo ◽  
Nguyen Hong Son ◽  
Tran Minh Tien
Keyword(s):  
Magnetic Field ◽  
Ground State ◽  
The Other ◽  
Orbit Coupling ◽  
Spin Component ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Half Metallic ◽  
Lieb Lattice ◽  
The Magnetic Field

The Lieb nano-ribons with the spin-orbit coupling, the lattice modulation and the magnetic field are exactly studied. They are constructed from the Lieb lattice with two open boundaries in a direction. The interplay between the spin-orbit coupling, the lattice modulation and the magnetic field emerges various exotic ground states. With certain conditions of the spin-orbit coupling, the lattice modulation, the magnetic field and filling the ground state becomes half metallic or half topological. In the half metallic ground state, one spin component is metallic, while the other spin component is insulating. In the half topological ground state, one spin component is topological, while the other spin component is topological trivial. The model exhibits very rich phase diagram.

The Effect of Spin-Orbit Coupling on the Electronic Structures and Half-Metallicity of Heusler Compounds: V2ReZ (Z=Al, Ga, ln)

2013 ◽  
Vol 683 ◽  
pp. 211-217
Author(s):  
Hong Ying Jia ◽  
Xue Fang Dai ◽  
Li Ying Wang ◽  
Fang Wang ◽  
Lei Chen ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Orbit Coupling ◽  
Spin Splitting ◽  
High Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Half Metallicity ◽  
Electron Effective Mass ◽  
Half Metallic ◽  
Singlet States

We have studied the influence of spin-orbit coupling (SOC) on the electronic structures and half-metallicity for the V2ReZ (Z=Al, Ga, In) compounds. It was found that the SOC has a slight influence on the whole configuration of the electronic structure and the degenerated states were split into several singlet states at the high-symmetry points. The egand t1ustates near the Fermi level are not sensitive to the SOC. The t2gstates composed of the side of half-metallic gap are sensitive to the SOC. The dispersivity of t2gstates was strongly reduced, which lead to an increase of the valence electron effective mass and the width of half-metallic gap. The SOC can slightly increase the spin splitting of Re and V(B) atoms. The Z atom has an influence on the intensity of SOC to act on half-metallic gap.

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