Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin Gap and the Nature of the 4d3 Magnetic Ground State in the
  Frustrated FCC Antiferromagnet Ba2YRuO6   The geometrically frustrated double perovskite Ba2YRuO6 has magnetic 4d3 Ru5+
ions decorating an undistorted face-centered cubic (FCC) lattice. This material
has been previously reported to exhibit commensurate long-range
antiferromagnetic order below T_N = 36K, a factor f = 15 times lower than its
Curie-Weiss temperature Theta_CW = -522 K, and purported short-range order to
T* = 47K. We report new time-of-flight neutron spectroscopy of Ba2YRuO6 which
shows the development of a 5 meV spin gap in the vicinity of the [100] magnetic
ordering wavevector below T_N = 36K, with the transition to long-range order
occurring at T* = 47K. We also report spin waves extending to 14 meV, a
surprisingly small bandwidth in light of the large Theta_CW. We compare the
spin gap and bandwidth to relevant neutron studies of the isostructural 4d1
material Ba2YMoO6,and discuss the results in the framework of relatively strong
spin-orbit coupling expected in 4d magnetic systems.

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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph