Na4Ir3O8 as a 3D spin liquid with fermionic spinons.
نویسندگان
چکیده
Spin liquid states for the spin-1/2 antiferromagnetic Heisenberg model on a hyperkagome lattice are studied. We classify and study flux states according to symmetries. Applying this model to Na4Ir3O8, we propose that the high temperature state may be described by a spinon Fermi surface, which forms a paired state with line nodes below 20 K. The possible mixed spin singlet and spin triplet pairing states are discussed according to the lattice symmetry which breaks inversion.
منابع مشابه
Algebraic spin liquid in an exactly solvable spin model.
We have proposed an exactly solvable quantum spin-3/2 model on a square lattice. Its ground state is a quantum spin liquid with a half-integer spin per unit cell. The fermionic excitations, dubbed as "spinons", are gapless with a linear dispersion, while the topological "vison" excitations are gapped. Moreover, these massless fermionic spinon excitations are topologically stable. Thus, this mod...
متن کاملPossibility of S=1 spin liquids with fermionic spinons on triangular lattices
In this paper, we generalize the fermionic representation for S=1 /2 spins to arbitrary spins. Within a mean field theory we obtain several spin liquid states for spin S=1 antiferromagnets on triangular lattices, including gapless f-wave spin liquid and topologically nontrivial px+ ipy spin liquid. After considering different competing orders, we construct a phase diagram for the J1−J3−K model....
متن کاملGapless Fermions and Quantum Order
Using 2D quantum spin-1/2 model as a concrete example, we studied the relation between gapless fermionic excitations (spinons) and quantum orders in some spin liquid states. Using winding number, we find that the projective symmetry group characterizing the quantum order can directly determine the pattern of Fermi points in the Brillouin zone. Thus quantum orders provide an origin for gapless f...
متن کامل0 Majorana liquids : the complete fractionalization of the electron
We describe ground states of correlated electron systems in which the electron fractionalizes into separate quasiparticles which carry its spin and its charge, and into real Majorana fermions which carry its Fermi statistics. Such parent states provide a unified theory of previously studied fractionalized states: their descendants include insulating and conducting states with neutral spin S = 1...
متن کاملQuantum Orders and Symmetric Spin Liquids
A concept – quantum order – is introduced to describe a new kind of orders that generally appear in quantum states at zero temperature. Quantum orders that characterize universality classes of quantum states (described by complex ground state wave-functions) is much richer then classical orders that characterize universality classes of finite temperature classical states (described by positive ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 101 19 شماره
صفحات -
تاریخ انتشار 2008