scholarly journals Magnetic scattering and spin-orbit coupling induced magnetoresistance in nonmagnetic heavy metal and magnetic insulator bilayer systems

2016 ◽  
Vol 94 (17) ◽  
Author(s):  
B. F. Miao ◽  
L. Sun ◽  
D. Wu ◽  
C. L. Chien ◽  
H. F. Ding
Keyword(s):  
Heavy Metal ◽  
Orbit Coupling ◽  
Magnetic Scattering ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Magnetic Insulator

scholarly journals Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Woo Seung Ham ◽  
Abdul-Muizz Pradipto ◽  
Kay Yakushiji ◽  
Kwangsu Kim ◽  
Sonny H. Rhim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Degrees Of Freedom ◽  
Orbit Coupling ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Band Formation ◽  
Research Activities ◽  
Moriya Interaction

AbstractDzyaloshinskii–Moriya interaction (DMI) is considered as one of the most important energies for specific chiral textures such as magnetic skyrmions. The keys of generating DMI are the absence of structural inversion symmetry and exchange energy with spin–orbit coupling. Therefore, a vast majority of research activities about DMI are mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report an asymmetric band formation in a superlattices (SL) which arises from inversion symmetry breaking in stacking order of atomic layers, implying the role of bulk-like contribution. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin–orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Our work provides more degrees of freedom to design chiral magnets for spintronics applications.

The suppression of spin–orbit coupling effect by the ZnO layer of La0.7Sr0.3MnO3/ZnO heterostructures grown on (001) oriented Si restores the negative magnetoresistance

Nanoscale ◽  
2021 ◽  
Author(s):  
Bibekananda Das ◽  
Prahallad Padhan
Keyword(s):  
Charge Transfer ◽  
Coupling Effect ◽  
Orbit Coupling ◽  
Negative Magnetoresistance ◽  
Magnetic Scattering ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Interfacial Charge Transfer ◽  
Positive Magnetoresistance ◽  
Interfacial Charge

In Si–La0.7Sr0.3MnO3, the interfacial charge transfer driven strong localized antiferromagnetic and spin–orbit couplings favor positive magnetoresistance, which is suppressed by strong magnetic scattering induced by the top ZnO layer results in negative magnetoresistance.

scholarly journals Giant Dzyaloshinskii-Moriya interaction in Rashba superlattices

2020 ◽  
Author(s):  
Woo-Seung Ham ◽  
Abdul-Muizz Pradipto ◽  
Kay Yakushiji ◽  
Kwangsu Kim ◽  
Sonny Rhim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Material Design ◽  
Orbit Coupling ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Band Formation ◽  
Stacking Order ◽  
Magnetic Skyrmions ◽  
Moriya Interaction

Abstract Dzyaloshinskii-Moriya interaction (DMI) is considered as one of the most important energy for specific chiral texture such as magnetic skyrmions. The key of generating DMI is absence of structural inversion symmetry and exchange energy with spin-orbit coupling. Therefore, a vast majority of researches about DMI is mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report that asymmetric band formation in an artificial superlattice arises from inversion symmetry breaking in stacking order of atomic layers, resulting in bulk DMI. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin-orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Such Rashba superlattices can be a new class of material design for spintronics applications.

scholarly journals Unconventional supercurrent phase in Ising superconductor Josephson junction with atomically thin magnetic insulator

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
H. Idzuchi ◽  
F. Pientka ◽  
K.-F. Huang ◽  
K. Harada ◽  
Ö. Gül ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Orbit Coupling ◽  
Cooper Pairs ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Magnetic Domains ◽  
Magnetic Exchange ◽  
Spin Texture ◽  
Magnetic Insulator ◽  
Opening Up

AbstractIn two-dimensional (2D) NbSe2 crystal, which lacks inversion symmetry, strong spin-orbit coupling aligns the spins of Cooper pairs to the orbital valleys, forming Ising Cooper pairs (ICPs). The unusual spin texture of ICPs can be further modulated by introducing magnetic exchange. Here, we report unconventional supercurrent phase in van der Waals heterostructure Josephson junctions (JJs) that couples NbSe2 ICPs across an atomically thin magnetic insulator (MI) Cr2Ge2Te6. By constructing a superconducting quantum interference device (SQUID), we measure the phase of the transferred Cooper pairs in the MI JJ. We demonstrate a doubly degenerate nontrivial JJ phase (ϕ), formed by momentum-conserving tunneling of ICPs across magnetic domains in the barrier. The doubly degenerate ground states in MI JJs provide a two-level quantum system that can be utilized as a new dissipationless component for superconducting quantum devices. Our work boosts the study of various superconducting states with spin-orbit coupling, opening up an avenue to designing new superconducting phase-controlled quantum electronic devices.

scholarly journals Enhancement of spin-orbit coupling and magnetic scattering in hydrogenated graphene

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Shimin Cao ◽  
Chuanwu Cao ◽  
Shibing Tian ◽  
Jian-Hao Chen
Keyword(s):  
Orbit Coupling ◽  
Magnetic Scattering ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Hydrogenated Graphene

scholarly journals Spin–Orbit Effects in CoFeB/MgO Heterostructures with Heavy Metal Underlayers

SPIN ◽  
2016 ◽  
Vol 06 (02) ◽  
pp. 1640002 ◽  
Author(s):  
Jacob Torrejon ◽  
Junyeon Kim ◽  
Jaivardhan Sinha ◽  
Masamitsu Hayashi
Keyword(s):  
Heavy Metal ◽  
Transition Metals ◽  
Magnetic Anisotropy ◽  
Metal Layer ◽  
Perpendicular Magnetic Anisotropy ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Moriya Interaction ◽  
Strong Spin

We study effects originating from the strong spin–orbit coupling in CoFeB/MgO heterostructures with heavy metal (HM) underlayers. The perpendicular magnetic anisotropy at the CoFeB/MgO interface, the spin Hall angle of the heavy metal layer, current induced torques and the Dzyaloshinskii–Moriya interaction at the HM/CoFeB interfaces are studied for films in which the early 5[Formula: see text] transition metals are used as the HM underlayer. We show how the choice of the HM layer influences these intricate spin–orbit effects that emerge within the bulk and at interfaces of the heterostructures.

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