Conserving approximation for the three-band Hubbard model: Flat quasiparticle dispersion

被引：26

作者：

Putz, R ^{[1
]}

Preuss, R ^{[1
]}

Muramatsu, A ^{[1
]}

Hanke, W ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.53.5133

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is shown that the low-energy single-particle spectrum of the three-band Hubbard model at finite hole dopings agrees remarkably well with quantum Monte Carlo and experimental data within the framework of a conserving approximation including self-consistently the interaction with charge, spin, and particle-particle fluctuations. The dispersion of the quasiparticle peak is hat around the (pi,0), (0,pi) points as observed in recent angle-resolved photoemission measurements. The significant reduction of the dispersion near the Fermi level is due to spin fluctuations, rather than being induced by band effects.

引用

页码：5133 / 5136

页数：4

共 28 条

[1] EXPERIMENTALLY OBSERVED EXTENDED SADDLE-POINT SINGULARITY IN THE ENERGY-SPECTRUM OF YBA2CU3O6.9 AND YBA2CU4O8 AND SOME OF THE CONSEQUENCES [J].

ABRIKOSOV, AA ;

CAMPUZANO, JC ;

GOFRON, K .

PHYSICA C, 1993, 214 (1-2) :73-79

[2] CONSERVATION LAWS AND CORRELATION FUNCTIONS [J].

BAYM, G ;

KADANOFF, LP .

PHYSICAL REVIEW, 1961, 124 (02) :287-+

[3] SELF-CONSISTENT APPROXIMATIONS IN MANY-BODY SYSTEMS [J].

BAYM, G .

PHYSICAL REVIEW, 1962, 127 (04) :1391-&

[4] CONSERVING APPROXIMATIONS FOR STRONGLY FLUCTUATING ELECTRON-SYSTEMS .2. NUMERICAL RESULTS AND PARQUET EXTENSION [J].

BICKERS, NE ;

WHITE, SR .

PHYSICAL REVIEW B, 1991, 43 (10) :8044-8064

[5] CONSERVING APPROXIMATIONS FOR STRONGLY CORRELATED ELECTRON-SYSTEMS - BETHE-SALPETER-EQUATION AND DYNAMICS FOR THE TWO-DIMENSIONAL HUBBARD-MODEL [J].

BICKERS, NE ;

SCALAPINO, DJ ;

WHITE, SR .

PHYSICAL REVIEW LETTERS, 1989, 62 (08) :961-964

[6]

BICKERS NE, 1989, ANN PHYS-NEW YORK, V193, P207

[7] ONE-ELECTRON SPECTRAL WEIGHT OF THE DOPED 2-DIMENSIONAL HUBBARD-MODEL [J].

BULUT, N ;

SCALAPINO, DJ ;

WHITE, SR .

PHYSICAL REVIEW LETTERS, 1994, 72 (05) :705-708

[8] QUASI-PARTICLE DISPERSION IN THE CUPRATE SUPERCONDUCTORS AND THE 2-DIMENSIONAL HUBBARD-MODEL [J].

BULUT, N ;

SCALAPINO, DJ ;

WHITE, SR .

PHYSICAL REVIEW B, 1994, 50 (10) :7215-7218

[9] FLAT QUASI-PARTICLE DISPERSION IN THE 2D T-J MODEL [J].

DAGOTTO, E ;

NAZARENKO, A ;

BONINSEGNI, M .

PHYSICAL REVIEW LETTERS, 1994, 73 (05) :728-731

[10] KEY FEATURES IN THE MEASURED BAND-STRUCTURE OF BI2SR2CACU2O8+DELTA - FLAT BANDS AT E(F) AND FERMI-SURFACE NESTING [J].

DESSAU, DS ;

SHEN, ZX ;

KING, DM ;

MARSHALL, DS ;

LOMBARDO, LW ;

DICKINSON, PH ;

LOESER, AG ;

DICARLO, J ;

PARK, CH ;

KAPITULNIK, A ;

SPICER, WE .

PHYSICAL REVIEW LETTERS, 1993, 71 (17) :2781-2784

← 1 2 3 →