scholarly journals Instability of a quantum spin liquid in an organic triangular-lattice antiferromagnet

2010 ◽  
Vol 6 (9) ◽  
pp. 673-676 ◽  
Author(s):  
T. Itou ◽  
A. Oyamada ◽  
S. Maegawa ◽  
R. Kato
Keyword(s):  
Triangular Lattice ◽  
Quantum Spin ◽  
Spin Liquid ◽  
Quantum Spin Liquid ◽  
Triangular Lattice Antiferromagnet

scholarly journals Field-induced instability of the quantum spin liquid ground state in the Jeff=12 triangular-lattice compound NaYbO2

2019 ◽  
Vol 99 (18) ◽  
Author(s):  
K. M. Ranjith ◽  
D. Dmytriieva ◽  
S. Khim ◽  
J. Sichelschmidt ◽  
S. Luther ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Ground State ◽  
Quantum Spin ◽  
Spin Liquid ◽  
Quantum Spin Liquid

scholarly journals Quantum spin liquid ground state in the disorder free triangular lattice NaYbS2

2019 ◽  
Vol 100 (24) ◽  
Author(s):  
R. Sarkar ◽  
Ph. Schlender ◽  
V. Grinenko ◽  
E. Haeussler ◽  
Peter J. Baker ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Ground State ◽  
Quantum Spin ◽  
Spin Liquid ◽  
Quantum Spin Liquid

scholarly journals Strong quantum fluctuations in a quantum spin liquid candidate with a Co-based triangular lattice

2019 ◽  
Vol 116 (29) ◽  
pp. 14505-14510 ◽  
Author(s):  
Ruidan Zhong ◽  
Shu Guo ◽  
Guangyong Xu ◽  
Zhijun Xu ◽  
Robert J. Cava
Keyword(s):  
Triangular Lattice ◽  
Magnetic Ordering ◽  
Quantum Fluctuations ◽  
Quantum Spin ◽  
Low Energy ◽  
Spin Liquid ◽  
Effective Spin ◽  
Experimental Realization ◽  
Quantum Spin Liquid ◽  
Applied Fields

Currently under active study in condensed matter physics, both theoretically and experimentally, are quantum spin liquid (QSL) states, in which no long-range magnetic ordering appears at low temperatures due to strong quantum fluctuations of the magnetic moments. The existing QSL candidates all have their intrinsic disadvantages, however, and solid evidence for quantum fluctuations is scarce. Here, we report a previously unreported compound, Na2BaCo(PO4)2, a geometrically frustrated system with effective spin-1/2 local moments for Co2+ ions on an isotropic 2-dimensional (2D) triangular lattice. Magnetic susceptibility and neutron scattering experiments show no magnetic ordering down to 0.05 K. Thermodynamic measurements show that there is a tremendous amount of magnetic entropy present below 1 K in 0-applied magnetic field. The presence of localized low-energy spin fluctuations is revealed by inelastic neutron measurements. At low applied fields, these spin excitations are confined to low energy and contribute to the anomalously large specific heat. In larger applied fields, the system reverts to normal behavior as evident by both neutron and thermodynamic results. Our experimental characterization thus reveals that this material is an excellent candidate for the experimental realization of a QSL state.

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