Spin-Polarized Negative Differential Resistance in a Self-Assembled Molecular Chain

Chen, Ying-Chin; Hsu, Shih-Hao; Kaun, Chao-Cheng; Lin, Minn-Tsong

doi:10.1021/jp5059947

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…In this work, we reported the spin-dependent negative differential resistance (SPNDR) in DNA by studying the I – V characteristic for spin current (Figure ). This effect is experimentally reported in a self-assembled molecular chain and graphene nanoribbons previously. An SPNDR device will enrich spintronics as well.…”

Section: Resultssupporting

confidence: 78%

DNA Spintronics: Charge and Spin Dynamics in DNA Wires

2016

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A combined analytical approach is proposed to investigate the spin-selectivity properties of DNA nanowires considering the spin degree of freedom in the extended Peyrard–Bishop–Holstein model. On the basis of a real chain of DNA sequence, no completely pure spin current through DNA is shown, instead, one of the spin currents is dominant over another and creates a spin filtering effect. In several parameter regions, the net charge current is low, and thus a nearly pure spin current could be reported. We examined the effects of external fields, temperature, and sequence variation on spin-dependent charge transfer in DNA. The results show peaks in the DNA spin polarization in some parameter values. A DNA coder can be created according to these polarization peaks. Transporting information by using the DNA spin polarization is interested in information theory. Meanwhile, other parameter values exist, where nearly pure spin currents appear. The appearance of these islands can be confirmed and predicted using the Rényi fractal dimension approach.

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Section: Resultssupporting

confidence: 78%

DNA Spintronics: Charge and Spin Dynamics in DNA Wires

2016

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“…It shows that only the spin-up channel can produce the current, whereas the current of the spin-down channel is equal to zero, implying that the current in the 1D CrN is 100% spin-polarized. More interestingly, the characteristic of negative differential resistance (NDR) [42][43][44] can be observed when the voltage is larger than 1.0 V. By analyzing the transmission spectra in Figs. 4(b) and 4(c), we find that with the increase of bias voltage, although the bias energy window becomes wider, the transmission inside the window is suppressed, which di-rectly results in the occurrence of NDR phenomenon.…”

Section: Resultsmentioning

confidence: 99%

Prediction of one-dimensional CrN nanostructure as a promising ferromagnetic half-metal

Xiang

Wang

et al. 2023

Chinese Phys. B

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Searching for one-dimensional (1D) nanostructure with ferromagnetic (FM) half-metallicity is of significance for the development of miniature spintronic devices. Here, based on first-principles calculations, we propose that the 1D CrN nanostructure is a FM half-metal, which can generate the fully spin-polarized current. The ab initio molecular dynamic simulation and the phonon spectrum calculation demonstrate that the 1D CrN nanostructure is thermodynamically stable. The partially occupied Cr-d orbitals endow the nanostructure with FM half-metallicity, in which the half-metallic gap (Δs) reaches up to 1.58 eV. The ferromagnetism in the nanostructure is attributed to the superexchange interaction between the magnetic Cr atoms, and a sizable magnetocrystalline anisotropy energy (MAE) is obtained. Moreover, the transverse stretching of nanostructure can effectively modulate the Δs and MAE, accompanied by the preservation of half-metallicity. A nanocable is designed by encapsulating the CrN nanostructure with a BN nanotube, and the intriguing magnetic and electronic properties of the nanostructure are retained. These novel characteristics render the 1D CrN nanostructure a compelling candidate for exploiting high-performance spintronic devices.

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“…Such regions are known as spin-dependent negative differential resistance (SPNDR) areas. SPNDR is experimen- tally demonstrated in a self-assembled molecular chain 40 and theoretically in DNA-based materials. 18 An SPNDR device enhances spintronic devices.…”

Section: ■ Methodsmentioning

confidence: 99%

Investigation and Control of Strain-Induced Spin-Dependent Current in a DNA Chain: A Piezospintronic Approach

2022

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Molecular systems are good candidates for designing the novel generation of nanoelectronic and nanospintronic devices due to their flexible structures. We have theoretically investigated stain-induced spin transport through a DNA chain to control a piezospintronic component. In the current modeling, we have applied a small strain to a tilted DNA chain connected between two leads and immersed it in a heat bath. The results show that a compressing strain can enhance the spin-dependent current up to 300 nA. Via modulating the control parameters, one can control the spin transport characteristic of a DNA-based material for designing an information storage and transport device.

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Spin-Polarized Negative Differential Resistance in a Self-Assembled Molecular Chain

Cited by 10 publications

References 45 publications

DNA Spintronics: Charge and Spin Dynamics in DNA Wires

DNA Spintronics: Charge and Spin Dynamics in DNA Wires

Prediction of one-dimensional CrN nanostructure as a promising ferromagnetic half-metal

Investigation and Control of Strain-Induced Spin-Dependent Current in a DNA Chain: A Piezospintronic Approach

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