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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/53918
Record Status
Checked
Record Id
53918
Title
Ferromagnetically coupled Shastry-Sutherland Quantum Spin Singlets in (CuCl)LaNb2O7
Contributors
C Tasel
,
J Kang
,
C Lee
,
O Hernandez
,
Y Qiu
,
W Paulus
,
E Collet
,
B Lake
,
T Guidi
,
M-H Whangbo
,
C Ritter
,
H Kageyama
,
S-H Lee
Abstract
A thorough crystal structure determination at very low temperature of (CuCl)LaNb2O7, originally proposed as a spin-1/2 square-lattice antiferromagnet, is reported thanks to the use of single-crystal x-ray diffraction and powder neutron diffraction. State-of-the-art calculations (maximum entropy method) reveal that (CuCl)LaNb2O7 is orthorhombic with Pbam symmetry. First-principles calculations demonstrate that the dominant magnetic interactions are antiferromagnetic between fourth nearest neighbors with a Cu-Cl-Cl-Cu exchange path, which lead to the formation of spin singlets. The two strongest interactions between the singlets are ferromagnetic, which makes (CuCl)LaNb2O7 the first system of ferromagnetically coupled Shastry-Sutherland quantum spin singlets.
Organisation
ISIS
,
STFC
Keywords
Physics
Funding Information
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Language
English (EN)
Type
Details
URI(s)
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Year
Journal Article
Phys Rev Lett
105 (2010): 167205.
doi:10.1103/PhysRevLett.105.167205
2010
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