Valence-bond theory of highly disordered quantum antiferromagnets
نویسندگان
چکیده
منابع مشابه
Valence-bond theory of highly disordered quantum antiferro- magnets
We present a large-N variational approach to describe the magnetism of insulating doped semiconductors based on a disorder-generalization of the resonating-valence-bond theory for quantum antiferromagnets. This method captures all the qualitative and even quantitative predictions of the strong-disorder renormalization group approach over the entire experimentally relevant temperature range. Fin...
متن کاملValence Bond Ground States in Quantum Antiferromagnets and Quadratic Algebras
The wave functions corresponding to the zero energy eigenvalue of a onedimensional quantum chain Hamiltonian can be written in a simple way using quadratic algebras. Hamiltonians describing stochastic processes have stationary states given by such wave functions and various quadratic algebras were found and applied to several diffusions processes. We show that similar methods can also be applie...
متن کاملValence Bond Solid Order Near Impurities in Two-Dimensional Quantum Antiferromagnets
Recent scanning tunnelling microscopy (STM) experiments on underdoped cuprates have displayed modulations in the local electronic density of states which are centered on a Cu-O-Cu bond (Kohsaka et al., Science 315, 1380 (2007)). As a paradigm of the pinning of such bond-centered ordering in strongly correlated systems, we present the theory of valence bond solid (VBS) correlations near a single...
متن کاملNature of the Disordered Phase of Low-dimensional Quantum Antiferromagnets
I review work done in collaboration with N. Read on the nature of the non-Néel phase of quantum antiferromagnets on bipartite lattices in one and two dimensions. I examine in detail the global phase diagram of a class of nearest-neighbor SU(N) antiferromagnets all of which have a two-sublattice Néel state as their classical ground state. The nonNéel or resonating valence bond state is shown to ...
متن کاملPhase Structure and Universality in Two-Dimensional Disordered Quantum Antiferromagnets
Two-dimensional disordered quantum antiferromagnets are studied by means of a continuum description in which disorder is introduced by a random distribution of couplings (spin stiffnesses) in the ordered phase of the Nonlinear Sigma Model. Quenched soliton (skyrmion) correlation functions are evaluated and used, along with the quenched magnetization, to characterize the phase structure of the s...
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: EPL (Europhysics Letters)
سال: 2009
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/87/27003