S=1自旋二聚体化合物Ba3Mn2O8的临界性质
强关联电子
2009-05-07 v1
摘要
Ba3Mn2O8是一种六方配位的Mn5+ S=1自旋二聚体系统，具有微小的单轴单离子各向异性。利用135,137Ba NMR谱学确定了H平行于c和H垂直于c方向不同场致相的下临界场Hc1，并测量了量子临界点(QCP)附近的纵向(Ml)和横向(Mt)磁化强度。Ml_parallel (T, Hc1)和Ml_perpendicular (T, Hc1)可通过求解相互作用玻色子稀薄气体的低能模型得以重现。Ml_parallel(T→0, H = Hc1)和Ml_perpendicular(T→0, H = Hc1)分别遵循玻色-爱因斯坦凝聚(BEC)型和类伊辛型QCP的预期行为。
引用
@article{arxiv.0905.0718,
title = {Critical properties of the S=1 spin dimer compound Ba3Mn2O8},
author = {S. Suh and K. A. Al-Hassanieh and E. C. Samulon and J. S. Brooks and W. G. Clark and P. L. Kuhns and L. L. Lumata and A. Reyes and I. R. Fisher and S. E. Brown and C. D. Batista},
journal= {arXiv preprint arXiv:0905.0718},
year = {2009}
}
备注
5 pages, 6 figures