scholarly journals Low-Energy Excitations of theS= 1/2 Quantum Spin Tube with the Triangular Lattice Structure

2005 ◽  
Vol 159 ◽  
pp. 297-301 ◽  
Author(s):  
Kouichi Okunishi ◽  
Shin-ichiro Yoshikawa ◽  
Tôru Sakai ◽  
Seiji Miyashita
Keyword(s):  
Triangular Lattice ◽  
Lattice Structure ◽  
Quantum Spin ◽  
Low Energy ◽  
Spin Tube

QUANTUM PHASE TRANSITION OF A TRIANGULAR LATTICE SPIN TUBE AND EDGE SPIN EFFECTS

2009 ◽  
Vol 20 (09) ◽  
pp. 1423-1430 ◽  
Author(s):  
KOUICHI OKUNISHI ◽  
SHIN-ICHIRO YOSHIKAWA ◽  
TÔRU SAKAI ◽  
SEIJI MIYASHITA
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Triangular Lattice ◽  
Lattice Structure ◽  
Quantum Spin ◽  
Quantum Phase ◽  
Spin Effect ◽  
Energy Excitation ◽  
Edge Spin ◽  
Spin Tube

We study the low-energy excitation of the quantum spin tube with the triangular lattice structure, using density matrix renormalization group. Taking account of the edge spin effect, we particularly investigate the spin gap behavior and the low-field magnetization curve near the quantum phase transition point in contrast with the usual free boundary condition. We then find that the bulk behavior of the spin tube can be extracted easier for the single spin termination.

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.

scholarly journals Large gap two dimensional topological insulators: the bilayer triangular lattice TlM (M = N, P, As, Sb)

2017 ◽  
Vol 5 (17) ◽  
pp. 4268-4274 ◽  
Author(s):  
Pan Zhou ◽  
Lin Xue ◽  
Lizhong Sun
Keyword(s):  
Triangular Lattice ◽  
Density Functional ◽  
Quantum Spin ◽  
Low Energy ◽  
Two Dimensional ◽  
Functional Theory ◽  
Quantum Spin Hall Effect ◽  
Berry Curvature ◽  
Band Inversion ◽  
Low Energy Electrons

Based on density functional theory and Berry curvature calculations, we predict that the p–p band inversion type quantum spin Hall effect (QSHE) can be realized in a series of two dimensional (2D) bilayer honeycomb TlMs (M = N, P, As, Sb), which can be effectively equivalent to a bilayer triangular lattice for low energy electrons.

scholarly journals Microscopic Phase Separation in Triangular-Lattice Quantum Spin Magnet κ-(BEDT-TTF)2Cu2(CN)3 Probed by Muon Spin Relaxation

2012 ◽  
Vol 81 (6) ◽  
pp. 063706 ◽  
Author(s):  
Saori Nakajima ◽  
Takao Suzuki ◽  
Yasuyuki Ishii ◽  
Kazuki Ohishi ◽  
Isao Watanabe ◽  
...  
Keyword(s):  
Phase Separation ◽  
Spin Relaxation ◽  
Triangular Lattice ◽  
Muon Spin ◽  
Muon Spin Relaxation ◽  
Quantum Spin ◽  
Lattice Quantum

Magnetic interactions inα−NaMnO2: Quantum spin-2 system on a spatially anisotropic two-dimensional triangular lattice

2008 ◽  
Vol 77 (2) ◽  
Author(s):  
Andrej Zorko ◽  
Samir El Shawish ◽  
Denis Arčon ◽  
Zvonko Jagličić ◽  
Alexandros Lappas ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Quantum Spin ◽  
Magnetic Interactions ◽  
Two Dimensional

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 Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
S. A. Zvyagin ◽  
D. Graf ◽  
T. Sakurai ◽  
S. Kimura ◽  
H. Nojiri ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Quantum Spin ◽  
Spin Hamiltonian ◽  
Pressure Tuning ◽  
Triangular Lattice Antiferromagnet

scholarly journals NMR studies of a twisted quantum spin tube [(CuCl2tachH)3Cl]Cl2

2009 ◽  
Vol 150 (4) ◽  
pp. 042036 ◽  
Author(s):  
Y Furukawa ◽  
Y Sumida ◽  
K Kumagai ◽  
H Nojiri ◽  
P Korgerler ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Nmr Studies ◽  
Spin Tube
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