Quantum and thermal fluctuations in the SU(N) Heisenberg spin-glass model near the quantum critical point -: art. no. 217202

被引：24
|
作者：
Camjayi, A [1 ]
Rozenberg, MJ [1 ]
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.90.217202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We solve for the SU(N) Heisenberg spin glass in the limit of large N focusing on small S and T. We study the effect of quantum and thermal fluctuations in the frequency dependent response function and observe interesting transfers of spectral weight. We compute the T dependence of the order parameter and the specific heat and find an unusual T-2 behavior for the latter at low temperatures in the spin-glass phase. We find remarkable qualitative agreement with various experiments on the quantum frustrated magnet SrCr9pGa12-9pO19.
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页数：4
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