Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impurity effects in coupled-ladder BiCu2PO6 studied by NMR and quantum
  Monte Carlo simulations   We present a 31P NMR study of the coupled spin 1/2 ladder compound BiCu2PO6.
In the pure material, intrinsic susceptibility and dynamics show a spin gap of
about . Substitution of non magnetic Zn or magnetic Ni impurity at Cu site
induces a staggered magnetization which results in a broadening of the 31P NMR
line, while susceptibility far from the defects is unaffected. The effect of Ni
on the NMR line broadening is twice that of Zn, which is consistent with
Quantum Monte Carlo (QMC) calculations assuming that Ni couples
ferromagnetically to its adjacent Cu. The induced moment follows a 1/T
temperature dependence due to the Curie-like development of the moment
amplitude while its extension saturates and does not depend on impurity content
or nature. This allow us to verify the generically expected scenario for
impurity doping and to extend it to magnetic impurity case: in an
antiferromagnetically correlated low dimensional spin system with
antiferromagnetic correlations, any type of impurity induces a staggered moment
at low temperature, whose extension is not linked to the impurity nature but to
the intrinsic physics at play in the undoped pure system, from 1D to 2D
systems.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas