Large-scale synthesis and photoluminescence of cobalt tungstate nanowires

Zhang, Cuiling; Guo, Donglin; Hu, Chenguo; Chen, Yanxue; Liu, Hong; Zhang, Hulin; Wang, Xue

doi:10.1103/physrevb.87.035416

Cited by 33 publications

(43 citation statements)

References 30 publications

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“…ABCs have been previously used in combination with a variety of approaches for electron transport and for effectively mimicking self-energies in non-equilibrium Green's function approaches. [24][25][26][27][28][29][30][31][32][33] In this approach, H op is represented by…”

Section: B Absorbing Boundary Conditions (Abcs)mentioning

confidence: 99%

Real-space method for highly parallelizable electronic transport calculations

et al. 2014

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We present a real-space method for first-principles nano-scale electronic transport calculations. We use the non-equilibrium Green's function method with density functional theory and implement absorbing boundary conditions (ABCs, also known as complex absorbing potentials, or CAPs) to represent the effects of the semi-infinite leads. In real space, the Kohn-Sham Hamiltonian matrix is highly sparse. As a result, the transport problem parallelizes naturally and can scale favorably with system size, enabling the computation of conductance in relatively large molecular junction models. Our use of ABCs circumvents the demanding task of explicitly calculating the leads' self-energies from surface Green's functions, and is expected to be more accurate than the use of the jellium approximation. In addition, we take advantage of the sparsity in real space to solve efficiently for the Green's function over the entire energy range relevant to low-bias transport. We illustrate the advantages of our method with calculations on several challenging test systems and find good agreement with reference calculation results.

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Section: B Absorbing Boundary Conditions (Abcs)mentioning

confidence: 99%

Real-space method for highly parallelizable electronic transport calculations

et al. 2014

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“…45,46 The device consists of three parts: the left and right electrode and the central scattering region, which contains the TM-GyNRs and parts of the leads to accommodate the molecule-electrode coupling interactions. The retarded Green's function of the scattering region…”

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confidence: 99%

Ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons

Pan

Zhang

et al. 2015

Phys. Rev. B

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“…For the transient current calculation, the time-dependent terminal current I α (t) of lead α is given by [32] …”

mentioning

confidence: 99%

“…We consider both upward and downward voltage pulse [32,33]. In ac regime, ac current consists of particle current and displacement current [34][35][36], namely the total dynamic conductance…”

mentioning

confidence: 99%

All-electrical generation of spin-polarized currents in quantum spin Hall insulators

et al. 2017

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The control and generation of spin-polarized currents (SPCs) without magnetic materials and external magnetic field is a big challenge in spintronics and normally requires spin-flip mechanism. In this work, we propose a novel method to control and generate SPCs in stanene nanoribbons in the quantum spin Hall (QSH) insulator regime by all electrical means without spin-flip mechanism. This is achieved with intrinsic spin-orbit coupling in stanene nanoribbons by tuning the relative phase of spin up and down electrons using a gate voltage, which creates a time delay between them thereby producing alternative SPCs driven by ac voltage. The control and generation of SPCs are demonstrated numerically for ac transport in both transient and ac regime. Our results are robust against edge imperfections and generally valid for other QSH insulators such as silicene and germanene, etc. These findings establish a novel route for generating SPCs by purely electrical means and open the door for new applications of semiconductor spintronics.

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Large-scale synthesis and photoluminescence of cobalt tungstate nanowires

Cited by 33 publications

References 30 publications

Real-space method for highly parallelizable electronic transport calculations

Real-space method for highly parallelizable electronic transport calculations

Ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons

All-electrical generation of spin-polarized currents in quantum spin Hall insulators

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