Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prediction of an Extended Ferroelectric Clathrate   Using first-principles calculations, we predict a lightweight
room-temperature ferroelectric carbon-boron framework in a host/guest clathrate
structure. This ferroelectric clathrate, with composition ScB$_3$C$_3$,
exhibits high polarization density and low mass density compared with widely
used commercial ferroelectrics. Molecular dynamics simulations show spontaneous
polarization with a moderate above-room-temperature T$_c$ of $\sim$370 K, which
implies large susceptibility and possibly large electrocaloric and
piezoelectric constants at room temperature. Our findings open the possibility
for a new class of ferroelectric materials with potential across a broad range
of applications.

5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int