Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin dynamics in a hole-doped S=1/2 Heisenberg antiferromagnet with a
  disordered ground state   Only 3% hole doping by Li is sufficient to suppress the long-range
antiferromagnetic order in La2CuO4. Spin dynamics in such a disordered state
was investigated with measurements of the dynamic magnetic structure factor
S(omega,q), using cold neutron spectroscopy, for La2(Cu0.94Li0.06)O4. The
S(omega,q) is found to sharply peak at (pi,pi), and its dynamics to be
relaxational. Confirming theoretical expectation for the quantum disordered 2D
S=1/2 Heisenberg antiferromagnet, the energy scale saturates at a finite value
at low temperatures. Possible connection to the ``pseudo spin gap'' phenomenon
observed in the NMR/NQR studies on underdoped cuprates is discussed.

9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph