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Showing 1–7 of 7 results
Advanced filters: Author: Hugo Aramberri Clear advanced filters

  • Negative capacitance (NC) is a promising route towards low-power electronics. Here, a theory clarifying the connection between NC and voltage amplification is presented, and it is predicted that incipient ferroelectric states that do not necessarily maximize NC can result in a tenfold voltage amplification.

    • Mónica Graf
    • Hugo Aramberri
    • Jorge Íñiguez
    ResearchOpen Access
    Nature Materials
    Volume: 21, P: 1252-1257

  • Hafnia ferroelectrics hold exciting technological potential, but the variety of phases and unconventional properties found in these materials make them extremely challenging to describe theoretically. Here, an approach based on an original reference phase provides a unifying picture to understand the multiple low-energy polymorphs of hafnia.

    • Hugo Aramberri
    • Jorge Íñiguez
    ResearchOpen Access
    Communications Materials
    Volume: 4, P: 1-8

  • Hf0.5Zr0.5O2 ferroelectric capacitors undergo a continuous transition from a positive effective to a fully inverted negative piezoelectric coefficient d33 upon electrical cycling. With proper ac training, both the net effective and the local piezoresponses can be nullified while the polarization is kept fully switchable.

    • Haidong Lu
    • Dong-Jik Kim
    • Catherine Dubourdieu
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • HfO2 is a promising ferroelectric material for applications in electronics but knowledge on its ferroic and electromechanical response properties is still lacking. Here, the authors demonstrate the peculiar piezoresponse of HfO2, predicting on how to reverse its sign by means of a biaxial strain.

    • Sangita Dutta
    • Pratyush Buragohain
    • Jorge Íñiguez
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-10

  • Antiferroelectrics are technologically important for energy conversion and storage, but are relatively scarce. Here, first-principles calculations suggest that alkali vanadates are as yet undetected antiferroelectrics, offering routes to experimentally tune and optimize their behavior.

    • Hugo Aramberri
    • Jorge Íñiguez
    ResearchOpen Access
    Communications Materials
    Volume: 1, P: 1-6