SPIRAL MAGNETISM AND COLLECTIVE EXCITATIONS IN DOPED HUBBARD MODELS

被引：8

作者：

BRENIG, W

机构：

[1] Institut für Theoretische Physik, Universität zu Köln, Köln, 50937

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1995年 / 99卷 / 3-4期

关键词：

D O I：

10.1007/BF00752301

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We discuss the ground state properties and the collective dynamics of spiral magnetic states in the two dimensional Hubbard model. In particular we present the phase diagram in the presence of a finite next-nearest-neighbor hopping integral t'. In contrast to the plain t Hubbard-model we find a region of stable antiferromagnetism in an extended interval of electron (hole) doping off half filling for a negative (positive) ratio of t'/t. In addition toe investigate the coupled charge and spiral spin-excitations off half filling. The resulting collective modes are found to be highly anisotropic and strongly Landau, damped.

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页码：319 / 324

页数：6

相关论文

共 29 条

[1] LUTTINGER FERMI-SURFACE OF METALLIC GAP SPECTRAL WEIGHT IN ND1.85CE0.15CUO4-Y [J].

ANDERSON, RO ;

CLAESSEN, R ;

ALLEN, JW ;

OLSON, CG ;

JANOWITZ, C ;

LIU, LZ ;

PARK, JH ;

MAPLE, MB ;

DALICHAOUCH, Y ;

DEANDRADE, MC ;

JARDIM, RF ;

EARLY, EA ;

OH, SJ ;

ELLIS, WP .

PHYSICAL REVIEW LETTERS, 1993, 70 (20) :3163-3166

[2] DOPING-INDUCED INCOMMENSURATE ANTIFERROMAGNETISM IN A MOTT-HUBBARD INSULATOR [J].

ARRIGONI, E ;

STRINATI, GC .

PHYSICAL REVIEW B, 1991, 44 (14) :7455-7465

[3] SPIRAL STATES IN THE 3-BAND HUBBARD-MODEL - A HARTREE-FOCK AND VARIATIONAL QUANTUM MONTE-CARLO APPROACH [J].

ASSAAD, FF .

PHYSICAL REVIEW B, 1993, 47 (13) :7910-7918

[4] RENORMALIZED SINGLE-PARTICLE PROPERTIES IN A SPIN-DENSITY-WAVE ANTIFERROMAGNET [J].

BRENIG, W ;

KAMPF, AP .

EUROPHYSICS LETTERS, 1993, 24 (08) :679-685

[5]

BRENIG W, 1994, IN PRESS

[6] INCOMMENSURATE MAGNETIC FLUCTUATIONS IN LA2-XSRXCUO4 [J].

CHEONG, SW ;

AEPPLI, G ;

MASON, TE ;

MOOK, H ;

HAYDEN, SM ;

CANFIELD, PC ;

FISK, Z ;

CLAUSEN, KN ;

MARTINEZ, JL .

PHYSICAL REVIEW LETTERS, 1991, 67 (13) :1791-1794

[7] RENORMALIZED PERTURBATION-THEORY OF MAGNETIC INSTABILITIES IN THE 2-DIMENSIONAL HUBBARD-MODEL AT SMALL DOPING [J].

CHUBUKOV, AV ;

FRENKEL, DM .

PHYSICAL REVIEW B, 1992, 46 (18) :11884-11901

[8] HARTREE-FOCK THEORY OF SPIRAL MAGNETIC ORDER IN THE 2-D HUBBARD-MODEL [J].

DZIERZAWA, M .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 86 (01) :49-52

[9]

FORSTER D, 1975, FRONTIERS PHYSICS, V47

[10] SLAVE-BOSON APPROACH TO SPIRAL MAGNETIC ORDER IN THE HUBBARD-MODEL [J].

FRESARD, R ;

DZIERZAWA, M ;

WOLFLE, P .

EUROPHYSICS LETTERS, 1991, 15 (03) :325-330