Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impurity scattering in a d-wave superconductor   The influence of (non-magnetic and magnetic) impurities on the transition
temperature of a d-wave superconductor is studied anew within the framework of
BCS theory. Pairing interaction decreases linearly with the impurity
concentration. Accordingly $T_{c}$ suppression is proportional to the
(potential or exchange) scattering rate, $1/\tau$, due to impurities. The
initial slope versus $1/\tau$ is found to depend on the superconductor contrary
to Abrikosov-Gor'kov type theory. Near the critical impurity concentration
$T_{c}$ drops abruptly to zero. Because the potential scattering rate is
generally much larger than the exchange scattering rate, magnetic impurities
will also act as non-magnetic impurities as far as the $T_{c}$ decrease is
concerned. The implication for the impurity doping effect in high $T_{c}$
superconductors is also discussed.

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The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat