Metal–ferroelectric supercrystals with periodically curved metallic layers

Hadjimichael, Marios; Li, Yaqi; Zatterin, Edoardo; Chahine, Gilbert; Conroy, Michele; Moore, Kalani; O’Connell, Eoghan; Ondrejkovic, P.; Márton, Pavel; Hlinka, J.; Bangert, U.; Leake, Steven; Zubko, Pavlo

doi:10.1038/s41563-020-00864-6

Cited by 55 publications

(47 citation statements)

References 37 publications

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“…(This is consistent with recent results in the literature, e.g. the occurrence of supercrystals in PbTiO 3 /SrRuO 3 superlattices with PTO layers above 15 cells 18 . )…”

supporting

confidence: 93%

Giant voltage amplification from incipient ferroelectric states

Graf,

Aramberri,

Zubko

et al. 2022

Preprint

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“…(This is consistent with recent results in the literature, e.g. the occurrence of supercrystals in PbTiO 3 /SrRuO 3 superlattices with PTO layers above 15 cells 18 . )…”

supporting

confidence: 93%

Giant voltage amplification from incipient ferroelectric states

Graf,

Aramberri,

Zubko

et al. 2022

Preprint

Self Cite

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“…In addition, even with identical composition, different configurations of each atom could result in dissimilar material properties. Artificial superlattice is the one of the prominent exemplifications, and supercrystal phases were reported in composite ferroelectrics K 1−α Li α Ta 1−β Nb β O 3 (KLTN) ( 19 ) and PbTiO 3 /SrTiO 3 superlattice ( 20 ) and PbTiO 3 /SrRuO 3 superlattice ( 21 ). Furthermore, the mechanism for the enhanced piezoelectricity in multielement-doped (K,Na)NbO 3 ceramics was reported recently ( 22 ).…”

Section: Introductionmentioning

confidence: 99%

High- k perovskite gate oxide for modulation beyond 10 ¹⁴ cm ⁻²

et al. 2022

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Scaling down of semiconductor devices requires high- k dielectric materials to continue lowering the operating voltage of field-effect transistors (FETs) and storing sufficient charge on a smaller area. Here, we investigate the dielectric properties of epitaxial BaHf 0.6 Ti 0.4 O 3 (BHTO), an alloy of perovskite oxide barium hafnate (BaHfO 3 ) and barium titanate (BaTiO 3 ). We found the dielectric constant, the breakdown field, and the leakage current to be 150, 5.0 megavolts per centimeter (MV cm −1 ), and 10 −4 amperes per square centimeter at 2 MV cm −1 , respectively. The results suggest that two-dimensional (2D) carrier density of more than n 2D = 10 14 per square centimeter (cm −2 ) could be modulated by the BHTO gate oxide. We demonstrate an n-type accumulation mode FET and direct suppression of more than n 2D = 10 14 cm −2 via an n-type depletion-mode FET. We attribute the large dielectric constant, high breakdown field, and low leakage current of BHTO to the nanometer scale stoichiometric modulation of hafnium and titanium.

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“…We chose to combine the antiferromagnetic-ferroelectric BFO with the ferromagnetic-paraelectric SrRuO3 (SRO) in such SLs and focus this report on the structural interaction at the heterointerfaces of the multilayers. A similar Metal/Ferroelectric SrRuO3/PbTiO3 type of 2 superlattice has been recently investigated and an exotic hierarchical domain structure (so called super-crystal) has been revealed [5]. PbTiO3 being a classical ferroelectric it would be interesting to explore similar super crystal structure but with a multiferroic such as BFO.…”

Section: Introductionmentioning

confidence: 99%

“…PbTiO3 being a classical ferroelectric it would be interesting to explore similar super crystal structure but with a multiferroic such as BFO. Being motivated by the fascinating work by Pavel's group [5] this preliminary structural investigation aims on a long term perspective to explore the possibility to obtain similar super-crystal state in multiferroic BFO/SRO SLs. Similar to PbTiO3/SrRuO3 SLs the possibility to electrically and magnetically tune the electronic and transport properties of such super-crystal multiferroic state in BFO/SRO SLs is envisioned.…”

Section: Introductionmentioning

confidence: 99%