Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polar metals as electrodes to suppress the critical-thickness limit in
  ferroelectric nanocapacitors   Enhancing the performance of nanoscale ferroelectric (FE) field-effect
transistors and FE capacitors for memory devices and logic relies on
miniaturizing the metal electrode/ferroelectric area and reducing the thickness
of the insulator. Although size reductions improve data retention, deliver
lower voltage threshold switching, and increase areal density, they also
degrade the functional electric polarization. There is a critical, nanometer
length $t_\mathrm{FE}^*$ below which the polarization disappears owing to
depolarizing field effects. Here we show how to overcome the critical thickness
limit imposed on ferroelectricity by utilizing electrodes formed from a novel
class of materials known as polar metals. Electronic structure calculations on
symmetric polar-metal electrode/FE capacitor structures demonstrate that
electric polarizations can persist to the sub-nanometer scale with
$t_\mathrm{FE}^*\rightarrow0$ when a component of the polar axis in the
electrode is perpendicular to the electrode/insulator interface. Our results
reveal the importance of interfacial dipolar coherency in sustaining the
polarization, which provides a platform for atomic scale structure-based design
of functions that deteriorate in reduced dimensions.

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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
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The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc