Robust High-κ Response in Molecularly Thin Perovskite Nanosheets

Citations Over TimeTop 10% of 2010 papers

Abstract

Size-induced suppression of permittivity in perovskite thin films is a fundamental problem that has remained unresolved for decades. This size-effect issue becomes increasingly important due to the integration of perovskite nanofilms into high-κ capacitors, as well as concerns that intrinsic size effects may limit their device performance. Here, we report a new approach to produce robust high-κ nanodielectrics using perovskite nanosheet (Ca2Nb3O10), a new class of nanomaterials that is derived from layered compounds by exfoliation. By a solution-based bottom-up approach using perovskite nanosheets, we have successfully fabricated multilayer nanofilms directly on SrRuO3 or Pt substrates without any interfacial dead layers. These nanofilms exhibit high dielectric constant (>200), the largest value seen so far in perovskite films with a thickness down to 10 nm. Furthermore, the superior high-κ properties are a size-effect-free characteristic with low leakage current density (<10(-7) A cm(-2)). Our work provides a key for understanding the size effect and also represents a step toward a bottom-up paradigm for future high-κ devices.

Related Papers

• → Synthesis of MoS2 nanosheet–graphene nanosheet hybrid materials for stable lithium storage(2013)304 cited
• → Enhanced fast response to Hg0 by adsorption-induced electronic structure evolution of Ti2C nanosheet(2021)42 cited
• → Zn-decorated S,P,B co-doped C2N nanosheet for ibuprofen adsorption: Experimental and density functional theory calculation(2023)19 cited
• → Density functional theory study towards capability of Ga-doped boron nitride nanosheet as a nanocarrier for 3-allyl-2 selenohydantoin anticancer drug delivery(2020)18 cited
• → Sensing Characterization of Metformin Drug by Pristine and Decorated BC3 Nanosheet: Quantum Chemical Study(2021)1 cited