Quantum phase transition in the dioptase magnetic lattice

Details Quantum phase transition in the dioptase magnetic lattice Quantum phase transition in the dioptase magnetic lattice

2002-08-06

arxiv.org/abs/cond-mat/0208106v1

Europhys. Lett. 60, 276 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 5 figures, EPL, in press

Scientific paper

10.1209/epl/i2002-00347-0

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.

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