DYNAMIC-RESPONSE FUNCTIONS OF HUBBARD-MODEL IN GUTZWILLER APPROXIMATION

被引：36

作者：

LI, T ^{[1
]}

SUN, YS ^{[1
]}

WOLFLE, P ^{[1
]}

机构：

[1] UNIV KARLSRUHE, INST THEORIE KONDENSIERTEN MAT, W-7500 KARLSRUHE 1, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1991年 / 82卷 / 03期

关键词：

D O I：

10.1007/BF01357181

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We calculate the two-point dynamic response functions of the Hubbard model at any filling from a slave-boson representation in the paramagnetic saddle point approximation. We use a spin-rotation invariant form of the representation due to Kotliar and Ruckenstein, for which the saddle point corresponds to Gutzwiller's variational approximation. In addition to the spin and charge susceptibilities, which have the familiar RPA form in the limit of small wavevector q, the double and single-occupancy response functions are here calculated for the first time.

引用

页码：369 / 374

页数：6

共 16 条

[1] CLASS OF VARIATIONAL SINGLET WAVE-FUNCTIONS FOR THE HUBBARD-MODEL AWAY FROM HALF FILLING [J].

ANDERSON, PW ;

SHASTRY, BS ;

HRISTOPULOS, D .

PHYSICAL REVIEW B, 1989, 40 (13) :8939-8944

[2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[3] CORRELATION OF ELECTRONS IN A NARROW S BAND [J].

GUTZWILLER, MC .

PHYSICAL REVIEW, 1965, 137 (6A) :1726-+

[4] EFFECT OF CORRELATION ON FERROMAGNETISM OF TRANSITION METALS [J].

GUTZWILLER, MC .

PHYSICAL REVIEW LETTERS, 1963, 10 (05) :159-&

[5] EFFECT OF CORRELATION ON FERROMAGNETISM OF TRANSITION METALS [J].

GUTZWILLER, MC .

PHYSICAL REVIEW, 1964, 134 (4A) :A923-+

[6] NEW FUNCTIONAL INTEGRAL APPROACH TO STRONGLY CORRELATED FERMI SYSTEMS - THE GUTZWILLER APPROXIMATION AS A SADDLE-POINT [J].

KOTLIAR, G ;

RUCKENSTEIN, AE .

PHYSICAL REVIEW LETTERS, 1986, 57 (11) :1362-1365

[7]

LAVAGNA M, 1990, HELV PHYS ACTA, V63, P310

[8] FUNCTIONAL-INTEGRAL APPROACH TO STRONGLY CORRELATED FERMI SYSTEMS - QUANTUM FLUCTUATIONS BEYOND THE GUTZWILLER APPROXIMATION [J].

LAVAGNA, M .

PHYSICAL REVIEW B, 1990, 41 (01) :142-148

[9] SUPERCONDUCTIVITY FROM COMMENSURATE FLUX PHASES [J].

LEDERER, P ;

POILBLANC, D ;

RICE, TM .

PHYSICAL REVIEW LETTERS, 1989, 63 (14) :1519-1522

[10] SPIN-ROTATION-INVARIANT SLAVE-BOSON APPROACH TO THE HUBBARD-MODEL [J].

LI, T ;

WOLFLE, P ;

HIRSCHFELD, PJ .

PHYSICAL REVIEW B, 1989, 40 (10) :6817-6821

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