Quantum phase transition in the dioptase magnetic lattice
arXiv:cond-mat/0208106 · doi:10.1209/epl/i2002-00347-0
Abstract
The study of quantum phase transitions, which are zero-temperature phase transitions between distinct states of matter, is of current interest in research since it allows for a description of low-temperature properties based on universal relations. Here we show that the crystal green dioptase Cu_6Si_6O_18 . 6H_2O, known to the ancient Roman as the gem of Venus, has a magnetic crystal structure, formed by the Cu(II) ions, which allows for a quantum phase transition between an antiferromagnetically ordered state and a quantum spin liquid.
6 pages, 5 figures, EPL, in press
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