Ferroelectric switching in bilayer 3R MoS2 via interlayer shear mode driven by nonlinear phononics

Park, Jaehong; Yeu, In Won; Han, Gyuseung; Hwang, Cheol Seong; Choi, Jung‐Hae

doi:10.1038/s41598-019-50293-y

Cited by 30 publications

(30 citation statements)

References 44 publications

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“…These values of reaction energy are comparable or lower than that of bilayer 3R MoS 2 (17.3 meV/f.u. ), 55 α−In 2 Se 2 (50 meV/f.u. ), 56 functionalized bismuth layer (120-548 meV/f.u.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Wang¹,

Yan²,

Yao³

et al. 2021

Preprint

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The intertwined ferroelectricity and photovoltaics in two-dimensional (2D) materials will enable the favorable improvement and control of photovoltaic preformances. In this paper, we take 2D 3R bilayer BX (X=P, As, Sb) as model systems to study the photovoltaic characteristics of intrinsic 2D out-of-plane (OOP) ferroelectric material, and try to explore a strategy to regulate the photoelectric properties by changing the strength of ferroelectric polarization. Due to the spatial inversion symmetry broken caused by special 3R stacking, spontaneous OOP ferroelectric polarization will appear in the 3R bilayer BX, which can be swichable through a specific interlayer sliding. The OOP ferroelectricity leads to charge transfer between layers, realizes efficient spatial separation between holes and electrons, and forms the characteristics of type-II band alignment. Moreover, due to perfect lattice match on account of two identical layers, the 3R bilayer BX is more stable and easy to realize in experiments than most of traditional 2D heterostructures made up of different materials. The 3R bilayer BX shows moderate band gap, ultra-high carrier mobility and efficient optical absorption, and its nano-devices present large photocurrent, high photon responsivity and excellent external quantum efficiency. More importantly, all these photoelectric parameters depend on the intrinsic OOP ferroelectric strength. By changing the interlayer distance of bilayer BX, the ferroelectric polarization can be regulated effectively to achieve the optimal photoelectric performance. Finally, we emphasize the importance and universality of spatial inversion symmetry broken in layered materials beyond the 3R bilayer BX to realize the co-regulation of ferroelectric and photovoltaics.

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“…These values of reaction energy are comparable or lower than that of bilayer 3R MoS 2 (17.3 meV/f.u. ), 55 α−In 2 Se 2 (50 meV/f.u. ), 56 functionalized bismuth layer (120-548 meV/f.u.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Wang¹,

Yan²,

Yao³

et al. 2021

Preprint

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“…7 between the upper and lower layers of WTe2. These authors continue to suggest that the out-of-plane polarization can be switched by an in-plane interlayer sliding 100,101) , which has been used to explain the switchability of other two-dimensional van der Waals materials, such as In2Se3 102,103) and MoS2 104) . From Fig.…”

Section: Wtementioning

confidence: 97%

Review on ferroelectric/polar metals

Zhou

Ariando

2020

Jpn. J. Appl. Phys.

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The possibility of reconciliation between seemingly mutually exclusive properties in one system can not only lead to theoretical breakthroughs but also potential novel applications. The research on the coexistence of two purportedly contra-indicated properties, ferroelectricity/polarity and conductivity, proposed by Anderson and Blount over 50 years ago was recently revitalized by the discovery of the first unambiguous polar metal LiOsO 3 and further fueled by the demonstration of the first switchable ferroelectric metal WTe 2 . In this review, we first discuss the reasons why the coexistence of ferroelectricity/polarity and conductivity have been deemed incompatible, followed by a review on the history of ferroelectric/polar metals. Secondly, we review the important milestones along with the corresponding mechanisms for the ferroelectric/polar metallic phases in these materials.Thirdly, we summarize the design approaches for ferroelectric/polar metals. Finally, we discuss the future prospects and potential applications of ferroelectric/polar metals.

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“…TMDs are foreseen to find use in most categories of optical modulation . Their semiconducting behavior allows for use in optoelectronic devices and switches, complementing graphene (a conductor) for applications that require 2D materials . These general applications have been abundantly covered in several recent reviews. ,, For 3R-MoS 2 specifically, the breaking of inversion symmetry inhibits interlayer exciton relaxation, which generates an additional degree of freedom in the band valleys (vide supra).…”

Section: Applicationsmentioning

confidence: 99%

3R-MoS₂ in Review: History, Status, and Outlook

Strachan

Masters

Maschmeyer

2021

ACS Appl. Energy Mater.

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Transition metal dichalcogenides (TMDs) of molybdenum and tungsten are layered van der Waals materials that exhibit a rich array of polytypes. The different possible arrangements of the constituents of the “two-dimensional” MX2 sheets (where M = group 4–10 elements, X = chalcogen) give rise to a host of interesting and tunable phenomena. Molybdenite, or molybdenum disulfide (MoS2) in its most abundant and thermodynamically stable form, 2H-MoS2, is perhaps the most widely used TMD, though the potential applications of its metastable polytypes have been recognized only recently. From among the polytypes, the 3R-MoS2 (rhombohedral) phase has attracted the most interest because of its thermodynamic stability, ABC stacking (as opposed to the AA′ of the more common 2H-MoS2), and lack of inversion symmetry. These properties make it an excellent candidate for photonics, optoelectronics, and catalysis. Because the literature on this material is rapidly expanding, this review seeks to summarize the history, known and predicted characteristics, syntheses, and applications, as well as common misconceptions of, and surrounding, 3R-MoS2. Although the review is chemically focused, it includes suggested reading to cover a broader scope.

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Ferroelectric switching in bilayer 3R MoS2 via interlayer shear mode driven by nonlinear phononics

Cited by 30 publications

References 44 publications

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Review on ferroelectric/polar metals

3R-MoS₂ in Review: History, Status, and Outlook

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Ferroelectric switching in bilayer 3R MoS2 via interlayer shear mode driven by nonlinear phononics

Cited by 30 publications

References 44 publications

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Universal co-existence of photovoltaics and ferroelectricity from two-dimensional 3R bilayer BX (X=P, As, Sb)

Review on ferroelectric/polar metals

3R-MoS2 in Review: History, Status, and Outlook

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Product

Resources

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3R-MoS₂ in Review: History, Status, and Outlook