Effect of interfacial interaction on spin polarization at organic-cobalt interface

Liu, Baoxing; Xie, Haipeng; Niu, Dongmei; Wang, Shitan; Zhao, Yuan; Liu, Yuquan; Lyu, Lu; Gao, Yongli

doi:10.1016/j.orgel.2019.105567

Cited by 7 publications

(8 citation statements)

References 47 publications

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“…With increasing thickness of rubrene, the HOMO peak and edge shift down to greater binding energy, as can be seen in Figure b. The shift of the energy level at the rubrene/Co(001) interface may stem from band bending and chemical interaction at this spinterface …”

Section: Results and Discussionmentioning

confidence: 84%

“…The shift of the energy level at the rubrene/Co(001) interface may stem from band bending and chemical interaction at this spinterface. 45 It is worth mentioning that a new feature appears at 0.5 eV below the Fermi level for a 0.2 nm rubrene film on Co(001), see Figure 1b. This new state indicates that there is a strong chemical interaction between rubrene and the Co(001) interface, namely, an interfacial hybridization state.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…The main peak at 284.1 eV is due to C−C sp 2 bonding that results from rubrene. 45 One peak at 285.1 eV is dominated by the C−O component, indicating the oxidation of cobalt when depositing rubrene. 36 The metallic Co film, even in UHV condition, is very sensitive to oxygen and forming cobalt oxide on the surface.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…We can see that the C 1s spectral intensity comes from three different main components at 0.2 nm rubrene/Co(001). The main peak at 284.1 eV is due to C–C sp 2 bonding that results from rubrene . One peak at 285.1 eV is dominated by the C–O component, indicating the oxidation of cobalt when depositing rubrene .…”

Section: Results and Discussionmentioning

confidence: 99%

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Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

et al. 2021

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The formation of hybrid interface states plays a crucial role in spin injection from a ferromagnetic metal into organic semiconductors. Here, we investigate the energy-level alignment and spin-polarized hybrid interface states between cobalt and rubrene using photoemission spectroscopy. We reveal that the presence of charge injection from cobalt to the rubrene molecular layer is determined by XPS and UPS measurements. We also find a spin-polarized interface state between cobalt and rubrene at 0.5 eV below the Fermi level, which can be attributed to chemical interaction between rubrene and Co(001). This hybridization state can induce spin polarization inversion at the rubrene/Co(001) interface as measured by spin-polarized UPS. The spin polarization inversion at the rubrene/Co(001) interface can be interpreted by a Zener exchange-type mechanism. On the basis of these observations, we obtain a deeper understanding of the electronic structure of the rubrene/Co(001) spinterface and show the importance for the quantitative description of rubrene/Co(001)-based organic spintronic devices.

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Section: Results and Discussionmentioning

confidence: 84%

Section: ■ Results and Discussionmentioning

confidence: 94%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

et al. 2021

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“…11 Even in the cases of ultrathin organic film thicknesses of 1.0 nm rubrene and 0.7 nm C 60 , when 1.0 nm 10,10 0 -dibromo-9,9 0 -bianthracene (DBBA) molecules are deposited on 3 nm Co thin films, spin-polarized states are induced. 12 All of these desirable properties are dependent on organic compounds with typical monolayer thicknesses. Organic materials have stimulated considerable research attention in the area of spintronics due to their weak spin-orbital coupling response, long spin relaxation time, and the flexibility of such materials and their low-cost of production.…”

Section: Introductionmentioning

confidence: 99%

Structural characterization and electronic properties of Ni/rubrene bilayers with alternative stacking sequences

Tanguturi

Tsai

et al. 2023

Phys. Chem. Chem. Phys.

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LaMn_xCo_1‐xO₃ (x=0, 0.25) Perovskites: Novel Nano Catalysts for Removal of Thiophene compounds in Fuels by Catalytic and Ultrasound‐assisted Oxidative Desulfurization

Esmaili

Hosseini

2023

ChemistrySelect

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LaMnxCo1‐xO3 (x=0, 0.25) perovskites were developed as novel nanocatalysts for the desulfurization of thiophenes compounds by catalytic oxidative desulfurization (CODS) and ultrasound‐assisted oxidative desulfurization (UAOD). The perovskites were synthesized by the sol‐gel auto‐combustion method and characterized by X‐ray diffraction (XRD), temperature programmed reduction (TPR), Scanning electron microscopy (SEM) and BET surface area. The experiments were designed by the Box‐Behnken method of response surface methodology. The catalytic experiments were designed by response surface methodology (RSM). LaMn0.25Co0.75O3 despite having a lower surface area rather than LaCoO3 exhibited superior activity due to easy reducibility and high surface electron density approved by TPR. Pareto analysis indicated that the DBT concentration had the most effect on the CODS process. Ultrasound waves enhanced the activity of the catalysts via the formation of hot spots as an accelerating and de‐agglomerating agent in the UAOD process, leading the LaMn0.25Co0.75O3 to be reusable at least for 5 cycles. A mechanism for DBT oxidation was proposed by the formation of DBT sulfone. Due to steric hindrance and the electron density of the sulfur atoms in thiophene derivatives, the following order resulted in their desulfurization rate: DBT>4‐MDBT>BT. The study indicated that perovskites could be novel and promising nanocatalysts for the desulfurization of fuels.

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Effect of interfacial interaction on spin polarization at organic-cobalt interface

Cited by 7 publications

References 47 publications

Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

Structural characterization and electronic properties of Ni/rubrene bilayers with alternative stacking sequences

LaMn_xCo_1‐xO₃ (x=0, 0.25) Perovskites: Novel Nano Catalysts for Removal of Thiophene compounds in Fuels by Catalytic and Ultrasound‐assisted Oxidative Desulfurization

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Effect of interfacial interaction on spin polarization at organic-cobalt interface

Cited by 7 publications

References 47 publications

Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

Hybridization-Induced Inversion of Spin Polarization at Rubrene/Ferromagnetic Cobalt Interface

Structural characterization and electronic properties of Ni/rubrene bilayers with alternative stacking sequences

LaMnxCo1‐xO3 (x=0, 0.25) Perovskites: Novel Nano Catalysts for Removal of Thiophene compounds in Fuels by Catalytic and Ultrasound‐assisted Oxidative Desulfurization

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Product

Resources

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LaMn_xCo_1‐xO₃ (x=0, 0.25) Perovskites: Novel Nano Catalysts for Removal of Thiophene compounds in Fuels by Catalytic and Ultrasound‐assisted Oxidative Desulfurization