Pressure-induced structural transition in copper pyrazine dinitrate and implications for quantum magnetism

被引：7

作者：

O'Neal, K. R. ^{[1
]}

Zhou, J. ^{[2
]}

Cherian, J. G. ^{[1
]}

Turnbull, M. M. ^{[3
,4
]}

Landee, C. P. ^{[3
,4
]}

Jena, P. ^{[2
]}

Liu, Z. ^{[5
]}

Musfeldt, J. L. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA

[3] Clark Univ, Dept Phys, Worcester, MA 01610 USA

[4] Clark Univ, Carlson Sch Chem, Worcester, MA 01610 USA

[5] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 10期

基金：

美国国家科学基金会;

关键词：

TEMPERATURE; CRITICALITY; S=1/2;

D O I：

10.1103/PhysRevB.93.104409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We combined synchrotron-based infrared and Raman spectroscopies, diamond anvil cell techniques, and first principles calculations to unveil pressure-induced distortions in quasi-one-dimensional Cu(pyz)(NO3)(2). The crossover at 0.7 GPa is local in nature whereas the transition at 5 GPa lowers symmetry from Pmna to P222(1) and is predicted to slightly increase magnetic dimensionality. Comparison with prior magnetoinfrared results reveals the striking role of out-of-plane bending of the pyrazine ligand, a finding that we discuss in terms of the possibility of using pressure to bias the magnetic quantum critical transition in this classic S = 1/2 antiferromagnet.

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页数：5

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