Finite-temperature properties of strongly correlated fermions in the honeycomb lattice
نویسندگان
چکیده
منابع مشابه
مقدمهای بر سیستمهای اسپینی کوانتمی
This manuscript is the collection of lectures given in the summer school on strongly correlated electron systems held at Isfahan university of technology, June 2007. A short overview on quantum magnetism and spin systems is presented. The numerical exact diagonalization (Lanczos) alghorithm is explained in a pedagogical ground. This is a method to get some ground state properties on finite clus...
متن کاملShort-range correlations and cooling of ultracold fermions in the honeycomb lattice.
We use determinantal quantum Monte Carlo simulations and numerical linked-cluster expansions to study thermodynamic properties and short-range spin correlations of fermions in the honeycomb lattice. We find that, at half filling and finite temperatures, nearest-neighbor spin correlations can be stronger in this lattice than in the square lattice, even in regimes where the ground state in the fo...
متن کاملبررسی ابررسانایی نامتعارف در شبکه لانه زنبوری
The possibility of symmetrical s-wave superconductivity in the honeycomb lattice is studied within a strongly correlated regime, using the Hubbard model. The superconducting order parameter is defined by introducing the Green function, which is obtained by calculating the density of the electrons . In this study showed that the superconducting order parameter appears in doping interval be...
متن کاملFinite temperature properties and frustrated ferromagnetism in a square lattice Heisenberg model
The spin 1/2 Heisenberg model on a square lattice with antiferromagnetic nearestand next-nearest neighbour interactions (the J1–J2 model) has long been studied as a paradigm of a two-dimensional frustrated quantum magnet. Only very recently, however, have the first experimental realisations of such systems been synthesized. The newest material, Pb2VO(PO4)2 seems to have mixed ferro– and antifer...
متن کاملZero-energy states and fragmentation of spin in the easy-plane antiferromagnet on a honeycomb lattice.
The core of the vortex in the Néel order parameter for an easy-plane antiferromagnet on a honeycomb lattice is demonstrated to bind two zero-energy states. Remarkably, a single electron occupying this midgap band has its spin fragmented between the two sublattices: Whereas it yields a vanishing total magnetization, it shows a finite Néel order, orthogonal to the one of the assumed background. T...
متن کامل