2019
DOI: 10.1103/physrevlett.123.067601
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Frustrated Dipole Order Induces Noncollinear Proper Ferrielectricity in Two Dimensions

Abstract: Within Landau theory, magnetism and polarity are homotopic, displaying a one-to-one correspondence between most physical characteristics. However, despite widely reported noncollinear magnetism, spontaneous noncollinear electric dipole order as ground state is rare. Here a dioxydihalides family is predicted to display noncollinear ferrielectricity, induced by competing ferroelectric and antiferroelectric soft modes. This intrinsic noncollinearity of dipoles generates unique physical properties, such as Z2 × Z2… Show more

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Cited by 75 publications
(47 citation statements)
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References 50 publications
(43 reference statements)
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“…Moreover, the polar state of BaFe 2 Se 3 is an exotic noncollinear ferrieletric (FiE) phase instead of a plain ferroelectric (FE) one [34,35]. To our best knowledge, noncollinear FiE order was only proposed in a few compounds, such as M O 2 X 2 (M = Mo/W, X=Br/Cl) [36] and strained BiFeO 3 [37]. It is reasonable to assume that finding this exotic 2×2 Block-type magnetic order with quasi one-dimensional ladders defines an effective feasible path to explore FiE materials.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, the polar state of BaFe 2 Se 3 is an exotic noncollinear ferrieletric (FiE) phase instead of a plain ferroelectric (FE) one [34,35]. To our best knowledge, noncollinear FiE order was only proposed in a few compounds, such as M O 2 X 2 (M = Mo/W, X=Br/Cl) [36] and strained BiFeO 3 [37]. It is reasonable to assume that finding this exotic 2×2 Block-type magnetic order with quasi one-dimensional ladders defines an effective feasible path to explore FiE materials.…”
Section: Introductionmentioning
confidence: 99%
“…Such continuous modulation of local dipoles is a result of the energy landscape [Fig. 5(c)], different from the very sharp domain wall predicted in WO 2 Cl 2 which owns the quadruple energy wells [39]. Since the domain wall is close to the model 2 state, it is expected to be metallic, as shown in Fig.…”
Section: Ferroelectric Domain Structurementioning
confidence: 80%
“…Recently, plenty of 2D ferroelectrics have been successfully exfoliated from a bulk structure in experiments, including in-plane ferroelectricity (Chang et al, 2016;Chang et al, 2019;Higashitarumizu et al, 2020), and out-of-plane ferroelectricity (Liu et al, 2016;Zhou et al, 2017;You et al, 2019;Yuan et al, 2019). Beyond experimental works, theoretical studies have predicted that ferroelectricity can survive in 2D materials (Ding et al, 2017;Huang et al, 2018a), in which some even possess noncollinear ferroelectric ordering (Lin et al, 2019;Song et al, 2021). Among these works, group IV chalcogenides (MX, M Sn, Ge; X S, Se) with few-layer have been discovered with intrinsic ferroelectricity and antiferroelectricity in the experiment (Fei et al, 2016), with a fantastic optical selective property as a polarizer (Shen et al, 2018), valley physics (Rodin et al, 2016), a high absorption coefficient as photovoltaic cells (Franzman et al, 2010;Shi and Kioupakis, 2015), robust ferroelectricity as nonvolatile storage (Wang and Qian, 2017) and so on (Yagmurcukardes et al, 2016).…”
Section: Introductionmentioning
confidence: 99%