Ferroelectricity, Antiferroelectricity, and Ultrathin 2D Electron/Hole Gas in Multifunctional Monolayer MXene

Chandrasekaran, Anand; Mishra, Avanish; Singh, Abhishek K.

doi:10.1021/acs.nanolett.7b01035

Cited by 205 publications

(154 citation statements)

References 68 publications

Supporting

Mentioning

141

Contrasting

Unclassified

Order By: Relevance

“…2D vertical FE has also been predicted in monolayer functionalized MXenes (Sc 2 CO 2 ) (Chandrasekaran et al, ). The switching of polarization in this type of FE materials occurs through a previously unknown intermediate antiferroelectric structure, thus establishing three states for applications in low‐dimensional NVM as shown in Figure b.…”

Section: Design Of Intrinsic 2d Fementioning

confidence: 83%

The rise of two‐dimensional van der Waals ferroelectrics

Jena

2018

WIREs Comput Mol Sci

121

100

View full text Add to dashboard Cite

Recent research on ferroelectrics based on two-dimensional (2D) materials may lead to a technological revolution, offering much higher density for integration as well as a better combination of semiconductor properties and non-volatile memories at the nanoscale compared with traditional ferroelectrics. In addition, ferroelectricity can be much more robust than ferromagnetism in 2D. In this study, we review the studies on 2D ferroelectricity starting from 2013, which are mainly firstprinciples predictions, including functionalization-induced 2D ferroelectricity in prevalent non-polar 2D materials as well as 2D intrinsic ferroelectricity, which are either in-plane or vertical. Although the number of reports on 2D ferroelectricity is still small compared to the large amount of research on 2D ferromagnetism, the potential of these materials to unravel new science and technology has stimulated considerable interest in 2D ferroelectricity, making it a fast developing field. It is interesting to note that 2D ferroelectricity was experimentally realized a year before 2D ferromagnetism, and the large difference in the Curie temperatures of these materials has further demonstrated that 2D ferroelectricity could be much more robust than 2D ferromagnetism.

show abstract

Section: Design Of Intrinsic 2d Fementioning

confidence: 83%

The rise of two‐dimensional van der Waals ferroelectrics

Jena

2018

WIREs Comput Mol Sci

121

100

View full text Add to dashboard Cite

show abstract

“…Note that ferroelectric materials are divided into in‐plane and out‐of‐plane ferroelectricity. Black phosphorus (BP)‐like group IV monochalcogenides such as GeSe and SnS are the typical in‐plane ferroelectric materials, while In 2 Se 3 , MXenes Sc 2 CO 2 , and Hf 2 VC 2 F 2 , 1T‐phase MoS 2 , bilayer BN, WTe 2 , etc. possess out‐of‐plane polarization.…”

Section: Resultsmentioning

confidence: 99%

Nonvolatile Electrical Control and Heterointerface‐Induced Half‐Metallicity of 2D Ferromagnets

Zhao

Zhang

Yuan

et al. 2019

Adv Funct Materials

120

100

View full text Add to dashboard Cite

Electrical control of atom-thick van der Waals (vdW) ferromagnets is a key toward future magnetoelectric nanodevices; however, state-of-the-art control approaches are volatile. In this work, introducing ferroelectric switching as an aided layer is demonstrated to be an effective approach toward achieving nonvolatile electrical control of 2D ferromagnets. For example, when a ferromagnetic monolayer CrI 3 and ferroelectric MXene Sc 2 CO 2 come together into multiferroic heterostructures, CrI 3 is controlled by polarized states P↑ and P↓ of Sc 2 CO 2 . P↑ Sc 2 CO 2 does not change the semiconducting nature of CrI 3 , but surprisingly P↓ Sc 2 CO 2 makes CrI 3 half-metallic. Nonvolatility of the electrical switching between two oppositely ferroelectric polarized states, therefore, indirectly enables nonvolatile electrical control of CrI 3 between ferromagnetic semiconductor and half-metal. The heterointerfaceinduced half-metallicity in CrI 3 is intrinsic without resorting to any chemical functionalization or external physical modification, which is rather beneficial to the practical application. This work paves the way for nonvolatile electrical control of 2D vdW ferromagnets and applications of CrI 3 in half-metal-based nanospintronics.

show abstract

“…13, which is sufficiently high for room-temperature device applications [89]. Interestingly, although Sc 2 CO 2 is a semiconductor with a band gap of 1.91 eV, bilayer is of this material is a semimetal, where 2D electron and hole gases exist on the opposite sides of the surfaces [89]. More recently, it has also been reported theoretically that multiferroelectricity can be achieved in ordereddouble transition metal MXenes, e.g., in Hf 2 VC 2 F 2 , where the helical spin states [see Figs.…”

Section: Ferroelectricitymentioning

confidence: 99%

“…The calculated energy barrier using nudged elastic band (NEB) method for switching polarization of ferroelectric Sc 2 CO 2 from +P z to −P z[89]. The z-axis is normal to the surface.…”

mentioning

confidence: 99%

Recent advances in MXenes: From fundamentals to applications

Khazaei

Mishra

Venkataramanan

et al. 2019

Current Opinion in Solid State and Materials Science

Self Cite

273

147

View full text Add to dashboard Cite

The family of MAX phases and their derivative MXenes are continuously growing in terms of both crystalline and composition varieties. In the last couple of years, several breakthroughs have been achieved that boosted the synthesis of novel MAX phases with ordered double transition metals and, consequently, the synthesis of novel MXenes with a higher chemical diversity and structural complexity, rarely seen in other families of two-dimensional (2D) materials. Considering the various elemental composition possibilities, surface functional tunability, various magnetic orders, and large spin−orbit coupling, MXenes can truly be considered as multifunctional materials that can be used to realize highly correlated phenomena. In addition, owing to their large surface area, hydrophilicity, adsorption ability, and high surface reactivity, MXenes have attracted attention for many applications, e.g., catalysts, ion batteries, gas storage media, and sensors. Given the fast progress of MXene-based science and technology, it is timely to update our current knowledge on various properties and possible applications. Since many theoretical predictions remain to be experimentally proven, here we mainly emphasize the physics and chemistry that can be observed in MXenes and discuss how these properties can be tuned or used for different applications.

show abstract

Ferroelectricity, Antiferroelectricity, and Ultrathin 2D Electron/Hole Gas in Multifunctional Monolayer MXene

Cited by 205 publications

References 68 publications

The rise of two‐dimensional van der Waals ferroelectrics

The rise of two‐dimensional van der Waals ferroelectrics

Nonvolatile Electrical Control and Heterointerface‐Induced Half‐Metallicity of 2D Ferromagnets

Recent advances in MXenes: From fundamentals to applications

Contact Info

Product

Resources

About