Anomalous dynamical spin susceptibility in the SU(N) Heisenberg spin-glass model and SrCr9xGa12-9xO19 -: art. no. 020404

被引：2

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 B | 2004年 / 69卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.69.020404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We solve the SU(N) Heisenberg spin-glass model in the limit of large N focusing on the dynamical spin susceptibility. We show that the results for the model at S=3/2, which is appropriate for the SrCr9xGa12-9xO19 compound, have a qualitative behavior in close agreement with neutron-scattering data. Quantum fluctuations produce a significant transfer of spectral weight to higher frequencies, while thermal fluctuations are responsible for a dramatic change in the low-frequency part of the dynamical spin susceptibility where T becomes comparable to the spin-glass transition temperature.

引用

页数：4

共 6 条

[1] Neutron spin-echo investigation of slow spin dynamics in kagome-bilayer frustrated magnets as evidence for phonon assisted relaxation in SrCr9xGa12-9xO19
Mutka, H.
Ehlers, G.
Payen, C.
Bono, D.
Stewart, J. R.
Fouquet, P.
Mendels, P.
Mevellec, J. Y.
Blanchard, N.
Collin, G.
PHYSICAL REVIEW LETTERS, 2006, 97 (04)
[2] Quantum and thermal fluctuations in the SU(N) Heisenberg spin-glass model near the quantum critical point -: art. no. 217202
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Rozenberg, MJ
PHYSICAL REVIEW LETTERS, 2003, 90 (21)
[3] Susceptibility and dilution effects of the kagome bilayer geometrically frustrated network:: A GaNMR study of SrCr9pGa12-9pO19 -: art. no. 144447
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Mendels, P
Collin, G
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PHYSICAL REVIEW B, 2002, 65 (14): : 1 - 18
[4] Spin-orbit splitting of Λ9Be excited states studied with the SU6 quark-model baryon-baryon interactions -: art. no. 047002
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PHYSICAL REVIEW C, 2004, 70 (04): : 047002 - 1
[5] Sr2V3O9 and Ba2V3O9:: Quasi-one-dimensional spin-systems with an anomalous low temperature susceptibility -: art. no. 174417
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Rosner, H
Yushankhai, V
Sichelschmidt, J
Shpanchenko, RV
Geibel, C
PHYSICAL REVIEW B, 2003, 67 (17)
[6] NMR study of the molecular nanomagnet [Fe8(N3C6H15)6O2(OH)12]•[Br8•9H2O] in the high-spin magnetic ground state -: art. no. 094439
Furukawa, Y
Kumagai, K
Lascialfari, A
Aldrovandi, S
Borsa, F
Sessoli, R
Gatteschi, D
PHYSICAL REVIEW B, 2001, 64 (09):

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