Dynamical mean-field theory of resonating-valence-bond antiferromagnets

被引：18

作者：

Georges, A

Siddharthan, R

Florens, S

机构：

[1] Ecole Normale Super, Phys Theor Lab, F-75231 Paris 05, France

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.87.277203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a theory of the spin dynamics of frustrated quantum antiferromagnets, which is based on an effective action for a plaquette embedded in a self-consistent bath. This approach, supplemented by a low-energy projection, is applied to the Kagome antiferromagnet. We find that a spin-liquid regime extends to very low energy, in which local correlation functions have a slow decay in time, well described by power-law behavior and omega /T scaling of the response function: chi "(omega) proportional to omega (-alpha) F(omega /T).

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页码：277203 / 277203

页数：4

相关论文

共 20 条

[1] RESONATING VALENCE BONDS - NEW KIND OF INSULATOR [J].

ANDERSON, PW .

MATERIALS RESEARCH BULLETIN, 1973, 8 (02) :153-160

[2] Effective-action approach to strongly correlated fermion systems [J].

Chitra, R ;

Kotliar, G .

PHYSICAL REVIEW B, 2001, 63 (11)

[3] Quantum fluctuations of a nearly critical Heisenberg spin glass [J].

Georges, A ;

Parcollet, O ;

Sachdev, S .

PHYSICAL REVIEW B, 2001, 63 (13)

[4] Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions [J].

Georges, A ;

Kotliar, G ;

Krauth, W ;

Rozenberg, MJ .

REVIEWS OF MODERN PHYSICS, 1996, 68 (01) :13-125

[5] Mean field theory of a quantum Heisenberg spin glass [J].

Georges, A ;

Parcollet, O ;

Sachdev, S .

PHYSICAL REVIEW LETTERS, 2000, 85 (04) :840-843

[6] Fluctuations in a quantum random Heisenberg paramagnet [J].

Grempel, DR ;

Rozenberg, MJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (02) :389-392

[7] Nonlocal dynamical correlations of strongly interacting electron systems [J].

Hettler, MH ;

Tahvildar-Zadeh, AN ;

Jarrell, M ;

Pruschke, T ;

Krishnamurthy, HR .

PHYSICAL REVIEW B, 1998, 58 (12) :R7475-R7479

[8] Order versus disorder in the quantum Heisenberg antiferromagnet on the kagome lattice using exact spectra analysis [J].

Lecheminant, P ;

Bernu, B ;

Lhuillier, C ;

Pierre, L ;

Sindzingre, P .

PHYSICAL REVIEW B, 1997, 56 (05) :2521-2529

[9] RVB description of the low-energy singlets of the spin 1/2 kagome antiferromagnet [J].

Mambrini, M ;

Mila, F .

EUROPEAN PHYSICAL JOURNAL B, 2000, 17 (04) :651-659

[10] Low-energy sector of the S=1/2 Kagome antiferromagnet [J].

Mila, F .

PHYSICAL REVIEW LETTERS, 1998, 81 (11) :2356-2359