Correlation Theory of Antiferromagnet Cr2O3for T>TN
نویسندگان
چکیده
منابع مشابه
Finite-size Spin-wave Theory of a Collienar Antiferromagnet
The ground-state and low-energy properties of the two-dimensional J1−J2 Heisenberg model in the collinear phase are investigated using finite-size spin-wave theory [Q. F. Zhong and S. Sorella, Europhys. Lett. 21, 629 (1993)], and Lanczos exact diagonalizations. For spin one-half – where the effects of quantization are the strongest – the spinwave expansion turns out to be quantitatively accurat...
متن کاملQuantum impurity in an antiferromagnet: non-linear sigma model theory
We present a new formulation of the theory of an arbitrary quantum impurity in an antiferromagnet, using the O(3) non-linear sigma model. We obtain the low temperature expansion for the impurity spin susceptibilities of antiferromagnets with magnetic long-range order in the ground state. We also consider the bulk quantum phase transition in d = 2 to the gapped paramagnet (d is the spatial dimen...
متن کاملHeisenberg Antiferromagnet
The Heisenberg model is described. Some of the interesting behavior of Heisenberg antiferromagnets and its behavior as a function of dimension is described. One dimensional systems have no long range order, two dimensional systems order magnetically only at zero temperature, and three dimensional systems have a non-zero critical temperature. Assembling lower dimensional pieces into ladders and ...
متن کاملTranscendent Describes Quantum Correlation Function of the XXZ Antiferromagnet away from the free - fermion point
We consider quantum correlation functions of the antiferromagnetic spin-1 2 Heisen-berg XXZ spin chain in a magnetic field. We show that for a magnetic field close to the critical field h c (for the critical magnetic field the ground state is ferromag-netic) certain correlation functions can be expressed in terms of the solution of the Painlevé V transcendent. This establishes a relation betwee...
متن کاملHeisenberg antiferromagnet
The results of a detailed histogram Monte-Carlo study of critical-fluctuation effects on the magnetic-field temperature phase diagram associated with the hexagonal Heisenberg antiferromagnet with weak axial anisotropy are reported. The multiphase point where three lines of continuous transitions merge at the spin-flop boundary exhibits a structure consistent with scaling theory but without the ...
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: Acta Physica Polonica A
سال: 1997
ISSN: 0587-4246,1898-794X
DOI: 10.12693/aphyspola.92.403