TY - JOUR
T1 - Quantum field induced orderings in fully frustrated Ising spin systems
AU - Tanaka, Shu
AU - Hirano, Masaki
AU - Miyashita, Seiji
N1 - Funding Information:
This work was partially supported by Research on Priority Areas “Physics of new quantum phases in superclean materials” (Grant no. 17071011 ) from MEXT and by the Next Generation Super Computer Project, Nanoscience Program from MEXT. S.T. is partly supported by Grant-in-Aid for Young Scientists Start-up (no. 21840021) from JSPS. The authors also thank the Supercomputer Center, Institute for Solid State Physics, University of Tokyo for the use of the facilities.
PY - 2011/1
Y1 - 2011/1
N2 - We study ordering mechanism which is induced by a quantum fluctuation in fully frustrated Ising spin systems. Since there are many degenerated states in frustrated systems, "order by thermal disorder" often takes place due to a kind of entropy effect. To consider "order by quantum disorder" in fully frustrated Ising spin systems, we apply transverse field as a quantum fluctuation. In triangular antiferromagnetic Ising spin system, there exists a ferromagnetic correlation in each sublattice. The sublattice correlation at zero temperature is enlarged due to transverse field. The quantum fluctuation enhances the solid order at zero temperature. This is an example of quantum field induced ordering in fully frustrated systems. We also study a case in which the transverse field induces a reentrant behavior as another type of order by quantum disorder, and compare correspondent cases in the classical systems.
AB - We study ordering mechanism which is induced by a quantum fluctuation in fully frustrated Ising spin systems. Since there are many degenerated states in frustrated systems, "order by thermal disorder" often takes place due to a kind of entropy effect. To consider "order by quantum disorder" in fully frustrated Ising spin systems, we apply transverse field as a quantum fluctuation. In triangular antiferromagnetic Ising spin system, there exists a ferromagnetic correlation in each sublattice. The sublattice correlation at zero temperature is enlarged due to transverse field. The quantum fluctuation enhances the solid order at zero temperature. This is an example of quantum field induced ordering in fully frustrated systems. We also study a case in which the transverse field induces a reentrant behavior as another type of order by quantum disorder, and compare correspondent cases in the classical systems.
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U2 - 10.1016/j.physe.2010.07.046
DO - 10.1016/j.physe.2010.07.046
M3 - Article
AN - SCOPUS:78651104961
SN - 1386-9477
VL - 43
SP - 766
EP - 768
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 3
ER -