Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic properties of ordered and disordered linear clusters of atoms
  and molecules   The electronic properties of one-dimensional clusters of N atoms or molecules
have been studied. The model used is similar to the Kronig-Penney model with
the potential offered by each ion being approximated by an attractive delta
function. The energy eigenvalues, the eigenstates and the density of states are
calculated exactly for a linear cluster of N atoms or molecules. The dependence
of these quantities on the various parameters of the problem show interesting
behavior. Effects of random distribution of the positions of the atoms and
random distribution of the strengths of the potential have also been studied.
The results obtained in this paper can have direct applications for linear
chain of atoms produced on metal surfaces or artificially created chain of
atoms by using scanning tunneling microscope or in studying molecular
conduction of electrons across one-dimensional barriers.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg