Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Competition of Dzyaloshinskii-Moriya and higher-order exchange
  interactions in Rh/Fe atomic bilayers on Ir(111)   Using spin-polarized scanning tunneling microscopy and density functional
theory we demonstrate the occurrence of a novel type of noncollinear spin
structure in Rh/Fe atomic bilayers on Ir(111). We find that higher-order
exchange interactions depend sensitively on the stacking sequence. For
fcc-Rh/Fe/Ir(111) frustrated exchange interactions are dominant and lead to the
formation of a spin spiral ground state with a period of about 1.5 nm. For
hcp-Rh/Fe/Ir(111) higher-order exchange interactions favor a double-row wise
antiferromagnetic or "uudd" state. However, the Dzyaloshinskii- Moriya
interaction at the Fe/Ir interface leads to a small angle of about 4{\deg}
between adjacent magnetic moments resulting in a canted "uudd" ground state.

8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th