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- W2752885377 endingPage "59" @default.
- W2752885377 startingPage "1" @default.
- W2752885377 abstract "We overview physical effects of exchange frustration and quantum spin fluctuations in (quasi-) two dimensional (2D) quantum magnets ($S=1/2$) with square, rectangular and triangular structure. Our discussion is based on the $J_1$-$J_2$ type frustrated exchange model and its generalizations. These models are closely related and allow to tune between different phases, magnetically ordered as well as more exotic nonmagnetic quantum phases by changing only one or two control parameters. We survey ground state properties like magnetization, saturation fields, ordered moment and structure factor in the full phase diagram as obtained from numerical exact diagonalization computations and analytical linear spin wave theory. We also review finite temperature properties like susceptibility, specific heat and magnetocaloric effect using the finite temperature Lanczos method. This method is powerful to determine the exchange parameters and g-factors from experimental results. We focus mostly on the observable physical frustration effects in magnetic phases where plenty of quasi-2D material examples exist to identify the influence of quantum fluctuations on magnetism." @default.
- W2752885377 created "2017-09-15" @default.
- W2752885377 creator A5007465455 @default.
- W2752885377 creator A5038140804 @default.
- W2752885377 date "2017-08-01" @default.
- W2752885377 modified "2023-10-14" @default.
- W2752885377 title "Frustrated two dimensional quantum magnets" @default.
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