Switchable and Reversible p<sup>+</sup>/n<sup>+</sup> Doping in 2D Semiconductors by Ionic 2D Minerals

Zhang, Rongjie; Sun, Yujie; Zhao, Shilong; Wang, Jingwei; Teng, Changjiu; Liu, Bilu; Cheng, Hui‐Ming

doi:10.1002/adfm.202213809

Cited by 3 publications

(5 citation statements)

References 54 publications

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“…MFM phase and AFM topography were mapped and processed via Gwydion v2. 55 (an open source software for SPM analysis).…”

Section: Methodsmentioning

confidence: 99%

“…[49][50][51][52] Recently, mica group members started attracting attention as multifunctional insulators in 2D electronic applications, [42,53,54] and especially in novel memory concepts with 2D semiconductors. [55,56] As for the magnetic vdW minerals, the naturally occurring sulfosalt cylindrite with vdW superlattice was explored. [57] While it is possible to exfoliate monolayers, the bulk antiferromagnetic Néel temperature (T N ) was found to be below 20 K. [57] Furthermore, a recent study has demonstrated the possibility to exchange interlayer ions in micas and vermiculites and to fabricate twistronic superlattices, causing interlayer species to reorder accordingly with the twisting angle via the stacking method.…”

Section: Introductionmentioning

confidence: 99%

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Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Khan

Peil

Sharma

et al. 2023

Advanced Physics Research

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Magnetic monolayers show great promise for future applications in nanoelectronics, data storage, and sensing. The research in magnetic two‐dimensional (2D) materials focuses on synthetic iodides and tellurides, which suffer from a lack of ambient stability. So far, naturally occurring layered magnetic materials have been overlooked. These minerals offer a unique opportunity to explore complex air‐stable layered systems with high concentration of magnetic ions. Magnetic ordering in iron‐rich phyllosilicates is demonstrated, focusing on minnesotaite, annite, and biotite. These naturally occurring layered materials integrate local moment baring ions of iron via magnesium/aluminum substitution in their octahedral sites. Self‐inherent capping by silicate/aluminate tetrahedral groups enables air stability of ultra‐thin layers. Their structure and iron oxidation states are determined via Raman and X‐ray spectroscopies. Superconducting quantum interference device magnetometry measurements are performed to examine the magnetic ordering. Paramagnetic or superparamagnetic characteristics at room temperature are observed. Below 40 K ferrimagnetic or antiferromagnetic ordering occurs. In‐field magnetic force microscopy on exfoliated flakes confirms that the paramagnetic response at room temperature persists down to monolayers. Further, a correlation between the mixture of the oxidation states of iron and the critical ordering temperature is established, indicating a path to design materials with higher critical temperatures via oxidation state engineering.

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“…MFM phase and AFM topography were mapped and processed via Gwydion v2. 55 (an open source software for SPM analysis).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Khan

Peil

Sharma

et al. 2023

Advanced Physics Research

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“…Zhang et al reported the use of an ionic mica layer as top electrostatic gates to achieve reversible P/N transition. 11 Bu et al introduced a dual top-gated electrostatic doping method to regulate polarity. 12 Electrostatic doping avoids damage to the device, whereas additional gates increase the complexity of the process.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Doping is categorized into electrostatic, physical, and chemical doping processes. Zhang et al reported the use of an ionic mica layer as top electrostatic gates to achieve reversible P/N transition . Bu et al introduced a dual top-gated electrostatic doping method to regulate polarity .…”

Section: Introductionmentioning

confidence: 99%

Controlling the Polarity of WSe₂ FETs by Interface Engineering for High-Gain CMOS

Wang,

Huang,

Sun

et al. 2024

ACS Appl. Nano Mater.

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Controlled polarity regulation is one of the key obstacles to the practical application of two-dimensional semiconductor field-effect transistors (FETs). Herein, n-and p-channel WSe 2 -based FETs were fabricated through interface engineering.The n-and p-channel WSe 2 FETs were obtained via metal-oxide and CuInS 2 passivation, respectively. The performance of WSe 2 FETs did not degenerate during the doping process owing to the concept of damage-free integration. Hence, the field-effect mobility could exceed 20 and 64 cm 2 V −1 s −1 in n-and p-channel devices, respectively. Moreover, the polarity of WSe 2 FETs was continuously regulated through fine control of the thickness of the oxide layer and Cu content. Thus, n-and p-type WSe 2 FETs with excellent output matching were demonstrated, and complementary metal-oxide semiconductor inverters were fabricated. The complementary metal-oxide semiconductor inverter showed an ultrahigh voltage gain beyond 175 and a total noise margin of ∼85%, indicating an ultrahigh logic state transition speed and excellent anti-interference ability. Our results provided a damage-free and continuous method to adjust the polarity of WSe 2 FETs and support its practical application in next-generation integrated circuits.

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“…There is no doubt that this will increase the redox reaction in the soil. As a result, it has received a lot of interest from academics, but the majority of them concentrate on the study of semiconductor mineral doping levels (Chen et al, 2021;Zhang et al, 2023) and pollution remediation (Tang et al, 2023). And there are few reports on how semiconductor minerals react to declining peatland water tables.…”

mentioning

confidence: 99%

Falling water tables reduce peatland semiconductor minerals' capacity for preserving carbon

Zeng,

Cao,

Bai

et al. 2023

Land Degrad Dev

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Semiconductor minerals in peatland play a significant role in the stability of the soil carbon pool. Nevertheless, the ecosystem‐scale importance of semiconductor minerals distribution and their influence on carbon stability in peatlands is still to be determined. Therefore, this study investigated the spatial distribution of semiconductor minerals and their photoelectrochemical activity (PA) in three peatlands with distinct water tables (Equisetum‐swamp [−2.0 cm], Caltha‐meadow [−8.0 cm], and Carex‐meadow [−13.8 cm]). The results indicate that the peatlands of the Qinghai‐Tibet Plateau mainly contain hematite (4.64 wt%), brookite (0.71 wt%), baddeleyite (0.23 wt‰), and zincite (0.10 wt‰); hematite content is the main mineral in peatland. And significantly increased with the decrease of the water table; the photoelectrochemical examination showed that the band gap of semiconductor minerals displayed Caltha‐meadow > Equisetum‐swamp > Carex‐meadow, and the carrier concentration displayed Carex‐meadow > Equisetum‐swamp > Caltha‐meadow, and Carex‐meadow exhibits a steady photocurrent density (0.3 μA/cm2) under light. This suggests that peat soils exhibit an improved photoelectric response with water table drawdown, which would promote the potential for soil carbon mineralization; structural equation model analysis showed that hematite had a significant positive effect on soil organic carbon (SOC), while the PA of semiconductor minerals had a significant negative effect on SOC. That is, semiconductor minerals can not only protect SOC by adsorption but also accelerate organic carbon mineralization by photo‐catalytic generation of reactive oxygen species. Therefore, the decrease in the water table increases the PA of semiconductor minerals, which will weaken the protective effect of semiconductor minerals on soil carbon through adsorption and other means.

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Switchable and Reversible p⁺/n⁺ Doping in 2D Semiconductors by Ionic 2D Minerals

Cited by 3 publications

References 54 publications

Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Controlling the Polarity of WSe₂ FETs by Interface Engineering for High-Gain CMOS

Falling water tables reduce peatland semiconductor minerals' capacity for preserving carbon

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Switchable and Reversible p+/n+ Doping in 2D Semiconductors by Ionic 2D Minerals

Cited by 3 publications

References 54 publications

Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals

Controlling the Polarity of WSe2 FETs by Interface Engineering for High-Gain CMOS

Falling water tables reduce peatland semiconductor minerals' capacity for preserving carbon

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Product

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Switchable and Reversible p⁺/n⁺ Doping in 2D Semiconductors by Ionic 2D Minerals

Controlling the Polarity of WSe₂ FETs by Interface Engineering for High-Gain CMOS