Quantum fluctuations in anisotropic triangular lattices with ferromagnetic and 
antiferromagnetic exchange

Schmidt, Burkhard; Thalmeier, Peter

doi:10.1103/PhysRevB.89.184402

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Quantum fluctuations in anisotropic triangular lattices with ferromagnetic and antiferromagnetic exchange

MPS-Authors

/persons/resource/persons126833

Schmidt, Burkhard
Burkhard Schmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126879

Thalmeier, Peter
Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

公開されているフルテキストはありません

付随資料 (公開)

There is no public supplementary material available

引用

Schmidt, B., & Thalmeier, P. (2014). Quantum fluctuations in anisotropic triangular lattices with ferromagnetic and antiferromagnetic exchange. Physical Review B, 89(18):, pp. 1-12. doi:10.1103/PhysRevB.89.184402.

引用: https://hdl.handle.net/11858/00-001M-0000-0019-907E-8

要旨

The Heisenberg model on a triangular lattice is a prime example of a geometrically frustrated spin system. However most experimentally accessible compounds have spatially anisotropic exchange interactions. As a function of this anisotropy, ground states with different magnetic properties can be realized. Motivated by recent experimental findings on Cs2CuCl4-xBrx, we discuss the full phase diagram of the anisotropic model with two exchange constants J(1) and J(2), including possible ferromagnetic exchange. Furthermore a comparison with the related square lattice model is carried out. We discuss the zero-temperature phase diagram, ordering vector, ground-state energy, and ordered moment on a classical level and investigate the effect of quantum fluctuations within the framework of spin-wave theory. The field dependence of the ordered moment is shown to be nonmonotonic with field and control parameter.