Observation of giant spin–orbit interaction in graphene and heavy metal heterostructures

Afzal, Amir Muhammad; Min, Kuen Hong; Ko, Byung Min; Eom, Jonghwa

doi:10.1039/c9ra06961e

Cited by 15 publications

(5 citation statements)

References 44 publications

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“…In contrast to local measurements in which small deviations from conventional ohmic behavior will cause respectively small deviations in the measured signal, in nonlocal configuration the ohmic contribution vanishes exponentially thus enhancing the relative sensitivity to unconventional mechanisms by orders of magnitude. Hence the nonlocal transport measurements have turned into a method of choice for charting novel transport phenomena in 2D materials [1- 29,[39][40][41][42].…”

mentioning

confidence: 99%

Long-range nontopological edge currents in charge-neutral graphene

Aharon-Steinberg

Marguerite

Perello

et al. 2021

Nature

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Van der Waals heterostructures display a rich variety of unique electronic properties. To identify novel transport mechanisms, nonlocal measurements have been widely used, wherein a voltage is measured at contacts placed far away from the expected classical flow of charge carriers. This approach was employed in search of dissipationless spin and valley transport [1-13], topological charge-neutral currents [14-18], hydrodynamic flows [19] and helical edge modes [20][21][22][23].

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confidence: 99%

Long-range nontopological edge currents in charge-neutral graphene

Aharon-Steinberg

Marguerite

Perello

et al. 2021

Nature

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“…This Pi bond causes to marvelous conductivity of graphene 78 . Figure 5 displays that graphene causes to generate the different forms of graphitic materials; graphite, CNTs fullerenes, and carbonfibers 79,80 …”

Section: Graphene As Electrode Materials For Supercapacitor Applicationmentioning

confidence: 99%

“…78 Figure 5 displays that graphene causes to generate the different forms of graphitic materials; graphite, CNTs fullerenes, and carbonfibers. 79,80 These excellent qualities enable graphene and graphene-based structures to find appliances in electronics, energy generation, storage devices, high-performance structural nanocomposites, and environmental protection. The unification of these exceptional mechanical, physical, and chemical qualities make graphene and graphene-based materials most charming for sustainable energy generation and electrochemical energy storage, [81][82][83][84][85][86][87][88][89][90][91][92][93] that is, supercapacitors, Li-ion batteries, fuel cells, photovoltaic, and solar cells.…”

Section: Graphene As Electrode Materials For Supercapacitor Applicationmentioning

confidence: 99%

2D‐TMDs based electrode material for supercapacitor applications

Ali

Afzal

Iqbal

et al. 2022

Intl J of Energy Research

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Transition metal dichalcogenides (TMDs) have been attracted the researchers to design high-performance electrodes to elevate power and energy density for better performance of energy storage devices. The attraction is due to the better surface area, high conductivity with distinct oxidation states, and the layered structure of TMDs. These characteristics persuade the TMDs to be the most favorable contenders to store energy via a cross-charge storage structure.TMDs belong to the family of two dimensions (2D) materials. This review article focused on graphene, molybdenum disulfide (MoS 2 ), and tungsten disulfide (WS 2 ) based electrode materials for supercapacitor applications. MoS 2 showed remarkable chemical/physical characteristics like tunable bandgap, specific surface area, mechanical friction, and high wear resistance. The researchers showed that the nanostructured materials of MoS 2 have exceptional characteristics and tremendous potential as supercapacitor electrodes. The MoS 2 composites have porous and hollow structures that display better energy storage characteristics. MoS 2 has excellent potential to fill the gap as an electrode material for energy storage devices and eco-friendly applications. There is much opportunity for scientific progress in the interdisciplinary sector. The nanostructures of WS 2 have auspicious qualities like good surface area, and excellent electrochemical characteristics, which make the WS 2 a super candidate for supercapacitor application. The WS 2 -based composites also showed excellent results for supercapacitors and other energy storage devices. Herein we study comparatively the properties of these materials discus as capacitance, energy density, power density, rate of retention, cyclic stability, and electrochemical properties.

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“…Another main barrier of the hexagonal graphene other than the bandgap issue is that it's parent form is diamagnetic, which prohibits it's application as a potential device. However, there are many studies on ways to perturb the electronic state of graphene away from ideal sp 2 hybridized state to induce magnetic correlations on the graphene sheets and on it's other derivatives, by the introduction of defects or vacancies on graphene layers [26][27][28][29][30], by designing the edge geometry, by doping, add-atom or by the substitution of transition metal (TM) ions or non-metal elements like boron [31][32][33][34][35][36] or by the heterostructure engineering with heavy metal [37]. The interaction between the magnetic impurity states with the Dirac electrons in the linear bands near the Fermi level induces a novel type of Kondo coupling and a non-trivial impurity driven quantum phase transition [38].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure evolution of the transition metals substituted tetragonal graphene: a first-principles investigations

Sadhukhan¹,

Kanungo²

2021

J. Phys.: Condens. Matter

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Motivated by the possibilities of tuning the Fermi level of the metallic band structure of the planar tetragonal graphene (T-graphene), by using the transition metals (TMs) substitution (3d, 4d and 5d series), the electronic structure investigation has been carried out at low concentration level (≈2.7%) through ab initio density functional theory method. We have investigated the influence of the valence electrons of the TM on the evolution of the electronic structure and magnetization and the induced magnetic moments at the carbon atoms in the T-graphene network. The investigations also explored the possibilities of inducing long-range magnetic ordering. In the case of multi TMs substitutions we found the dominance signature of the antiferromagnetic correlations for most of the TM substituted cases. The critical analysis of the magnetization densities indicated the important role of the hybridization between the carbon π and σ orbitals with the TM-d states. We explored that the observed non-monotonic nature of the magnetization and evolution of electronic structure was due to the competing energy scales of electronic correlation, hybridization and crystal field splitting. This study opens up the route for further investigations towards the possibilities of using T-graphene as a potential polymorph of graphene for device applications.

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Observation of giant spin–orbit interaction in graphene and heavy metal heterostructures

Abstract: We used Pb as an intercalated layer between the graphene and Au and measured the spin–orbit interaction in local and non-local measurement configurations.

Cited by 15 publications

References 44 publications

Long-range nontopological edge currents in charge-neutral graphene

Long-range nontopological edge currents in charge-neutral graphene

2D‐TMDs based electrode material for supercapacitor applications

Electronic structure evolution of the transition metals substituted tetragonal graphene: a first-principles investigations

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