Field-induced decays in XXZ triangular-lattice antiferromagnets
نویسندگان
چکیده
منابع مشابه
Magnetic-Field Induced Quantum Phase Transitions in Triangular-Lattice Antiferromagnets
Cs2CuBr4 and Ba3NiSb2O9 are magnetically described as quasi-two-dimensional triangular-lattice antiferromagnets with spin1 2 and 1, respectively. We show that both systems exhibit a magnetization plateau at one-third of the saturation magnetization Ms due to the interplay of spin frustration and quantum fluctuation. In Cs2CuBr4 that has a spatially anisotropic triangular lattice, successive mag...
متن کاملQuantum phase diagram of the triangular-lattice XXZ model in a magnetic field.
The triangular lattice of S=1/2 spins with XXZ anisotropy is a ubiquitous model for various frustrated systems in different contexts. We determine the quantum phase diagram of the model in the plane of the anisotropy parameter and the magnetic field by means of a large-size cluster mean-field method with a scaling scheme. We find that quantum fluctuations break up the nontrivial continuous dege...
متن کاملXXZ and Ising spins on the triangular kagome lattice
The recently fabricated two-dimensional magnetic materials Cu9X2 cpa 6 ·xH2O cpa=2-carboxypentonic acid and X=F,Cl,Br have copper sites which form a triangular kagome lattice TKL , formed by introducing small triangles “a-trimers” inside of each kagome triangle “b-trimer” . We show that in the limit where spins residing on b-trimers have Ising character, quantum fluctuations of XXZ spins residi...
متن کاملQuantum Fluctuation-Induced Phase Transition in S = 1/2XY-like Heisenberg Antiferromagnets on the Triangular Lattice
The selection of the ground state among nearly degenerate states due to quantum fluctuations is studied for the S = 1/2 XY-like Heisenberg antiferromagnets on the triangular lattice in the magnetic field applied along the hard axis, which was first pointed out by Nikuni and Shiba. We find that the selected ground state sensitively depends on the degree of the anisotropy and the magnitude of the...
متن کاملQuasiparticles of spatially anisotropic triangular antiferromagnets in a magnetic field.
The spectral properties of the spin-1/2 Heisenberg antiferromagnet on an anisotropic triangular lattice in a magnetic field are investigated using a weak-interchain-coupling approach combined with exact solutions of a chain. Dominant modes induced by interchain interactions in a magnetic field behave as quasiparticles which show distinctive features such as anomalous incommensurate ordering and...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2016
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.94.140407