Exact Dimer Ground State and Quantized Magnetization Plateaus in the Two-Dimensional Spin SystemSrCu2(BO3)2

Autor:	K. Yoshimura, Masako Kato, N.V. Mushnikov, T. Goto, Charles P. Slichter, K. Kosuge, K. Onizuka, Raivo Stern, Y. Ueda, Hiroshi Kageyama
Rok vydání:	1999
Předmět:	Physics Condensed matter physics Band gap Dimer Spin system General Physics and Astronomy Magnetic susceptibility Magnetization chemistry.chemical_compound chemistry Condensed Matter::Strongly Correlated Electrons Cuprate Ground state Nuclear quadrupole resonance
Zdroj:	Physical Review Letters. 82:3168-3171
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.82.3168
Popis:	Magnetic susceptibility, Cu NQR, and high-filed magnetization have been measured in polycrystalline $\mathrm{SrCu}{}_{2}(\mathrm{BO}{}_{3}{)}_{2}$ having a two-dimensional (2D) orthogonal network of Cu dimers. This cuprate provides a new class of 2D spin-gap system $(\ensuremath{\Delta}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}30\mathrm{K})$ in which the ground state can be solved ``exactly.'' Furthermore, in the magnetization, two plateaus corresponding to $\frac{1}{4}$ and $\frac{1}{8}$ of the full Cu moment were first observed for 2D quantum spin systems.
Databáze:	OpenAIRE
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