PHYSICS: STUDY DATA FROM YEREVAN STATE UNIVERSITY UPDATE UNDERSTANDING OF PHYSICS

Science Letter
March 17, 2009

"A mixed Ising-Heisenberg spin system consisting of triangular
XXZ-Heisenberg spin clusters assembled into a chain by alternating
with Ising spins interacting to all three spins in the triangle is
considered," scientists writing in the journal Physical Review B report
(see also Physics).

"The exact solution of the model is given in terms of the
generalized decoration-iteration map and within the transfer-matrix
technique. Exact expressions for thermodynamic functions are derived,"
wrote D. Antonosyan and colleagues, Yerevan State University.

The researchers concluded: "Ground-state phase diagrams and
thermodynamic and magnetic properties of the system are examined."

Antonosyan and colleagues published their study in Physical Review B
(Exactly solvable Ising-Heisenberg chain with triangular XXZ-Heisenberg
plaquettes. Physical Review B, 2009;79(1):4432).

Additional information can be obtained by contacting D. Antonosyan,
Yerevan State University, Dept. of Theoret Physics, A Manoogian 1,
Yerevan 0025, Armenia.

The publisher of the journal Physical Review B can be contacted
at: American Physical Society, One Physics Ellipse, College Pk,
MD 20740-3844, USA.