Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fano-type effect in hydrogen-terminated pure nanodiamond   Two novel properties, unique for semiconductors: a negative electron affinity
[1-2], and a high p-type surface electrical conductivity [3-4], were discovered
in diamond at the end of the last century. Both properties appear when the
diamond surface is hydrogenated. A natural question arises: is the influence of
the surface hydrogen on diamond limited only to the electrical properties?
Here, we report the first observation of a transparency peak at 1328 cm-1 in IR
absorption of hydrogen-terminated pure (undoped) nanodiamonds. This new optical
property is ascribed to Fano-type destructive interference between zone-center
phonons and free carriers (holes) appearing in the near-surface layer of
hydrogenated nanodiamond. Our work opens the way to exploring the physics of
electron-phonon coupling in undoped diamonds and promises the application of
the H-terminated nanodiamonds as a new optical material with an induced
transparency in IR optical range.

1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con