E. Pisanova

collaborators

3 papers

cond-mat.stat-mech2001

Finite size and temperature effects in the $J_{1} - J_{2}$ model on a strip

E. S. Pisanova, N. B. Ivanov, N. S. Tonchev

Within Takahashi's spin-wave theory we study finite size and temperature effects near the quantum critical point in the $J_{1} - J_{2}$ Heisenberg antiferromagnet defined on a strip…

cond-mat1997

Low-temperature regimes and finite-size scaling in a quantum spherical model

H. Chamati, D. M. Danchev, E. S. Pisanova +1

A $d$ --dimensional quantum model in the spherical approximation confined to a general geometry of the form $L^{d - d^{'}} \times \infty^{d^{'}} \times L_{τ}^{z}$ ( $L$ --linear s…

cond-mat1997

Theory of a spherical quantum rotors model: low--temperature regime and finite-size scaling

Hassan Chamati, Ekaterina S. Pisanova, Nocholay S. Tonchev

The quantum rotors model can be regarded as an effective model for the low-temperature behavior of the quantum Heisenberg antiferromagnets. Here, we consider a $d$ -dimensional mode…

Finite size and temperature effects in the J1​−J2​ model on a strip

Low-temperature regimes and finite-size scaling in a quantum spherical model

Theory of a spherical quantum rotors model: low--temperature regime and finite-size scaling

Finite size and temperature effects in the $J_{1} - J_{2}$ model on a strip