Two types of adjacent dimer layers in the low-temperature phase of BaCuSi2O6

Article

关键词: BOSE-EINSTEIN CONDENSATION;    GROUND-STATE;    SRCU2(BO3)(2);    FIELD;   

DOI  :  10.1103/PhysRevB.86.014433

来源: SCIE

【 摘 要 】

The low-temperature crystal structure of BaCuSi2O6 has been investigated with high-resolution synchrotron x-ray and neutron powder diffraction techniques and has been found to be on average (ignoring the incommensurate modulation) orthorhombic, with the most probable space group Ibam. The Cu-Cu dimers in this material are forming two types of layerswith distinctly different interatomic distances. Subtle changes also modify the partially frustrated interlayer Cu-Cu exchange paths. The present results corroborate the interpretation of low-temperature nuclear magnetic resonance and inelastic neutron scattering data in terms of distinct dimer layers.

【 授权许可】

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