DOPING-INDUCED INCOMMENSURATE ANTIFERROMAGNETISM IN A MOTT-HUBBARD INSULATOR

被引:87
作者
ARRIGONI, E
STRINATI, GC
机构
[1] Scuola Normale Superiore
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 14期
关键词
D O I
10.1103/PhysRevB.44.7455
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Properties of incommensurate spiral spin phases are calculated at the mean-field level for a single-band Hubbard Hamiltonian with variable hole density, by adapting both the Hartree-Fock decoupling and the Kotliar-Ruckenstein slave-boson approach to a regular twist of the spin quantization axes from site to site in a two-dimensional square lattice. The relative stability of the (1,1) and (1,0) spiral phases, the coexistence of the antiferromagnetic and the spiral phases over a finite range of hole density, and the stiffness of the spirals against fluctuations of their direction and pitch are discussed within the model Hamiltonian over a wide range of hole density and interaction strength.
引用
收藏
页码:7455 / 7465
页数:11
相关论文
共 24 条
[1]   ANTIFERROMAGNETISM OF CUO2 LAYERS WITHIN A SLAVE-BOSON APPROACH [J].
ARRIGONI, E ;
STRINATI, G ;
CASTELLANI, C .
PHYSICAL REVIEW B, 1990, 41 (07) :4838-4841
[2]   QUANTUM SPIN NEMATICS - MOMENT-FREE MAGNETISM [J].
CHANDRA, P ;
COLEMAN, P .
PHYSICAL REVIEW LETTERS, 1991, 66 (01) :100-103
[3]   MAGNETIC-PROPERTIES OF THE 2-DIMENSIONAL HUBBARD-MODEL [J].
CHEN, L ;
BOURBONNAIS, C ;
LI, T ;
TREMBLAY, AMS .
PHYSICAL REVIEW LETTERS, 1991, 66 (03) :369-372
[4]   THEORY OF MAGNETIC RESONANCE IN HEAVY RARE-EARTH METALS [J].
COOPER, BR ;
NETTEL, SJ ;
SUHL, H ;
ELLIOTT, RJ .
PHYSICAL REVIEW, 1962, 127 (01) :57-&
[5]   THEORY OF HIGH-TC SUPERCONDUCTIVITY IN OXIDES [J].
EMERY, VJ .
PHYSICAL REVIEW LETTERS, 1987, 58 (26) :2794-2797
[6]   PHASE-SEPARATION IN THE T-J MODEL [J].
EMERY, VJ ;
KIVELSON, SA ;
LIN, HQ .
PHYSICAL REVIEW LETTERS, 1990, 64 (04) :475-478
[7]   REMARKS ON COUPLED SPIN AND CHARGE FIELDS IN HUBBARD HAMILTONIAN [J].
GOMES, AA ;
LEDERER, P .
JOURNAL DE PHYSIQUE, 1977, 38 (02) :231-239
[8]  
GORKOV LP, 1990, JETP LETT+, V52, P394
[9]   THEORY OF THE MAGNETIC EXCITATIONS IN THE CU-O SUPERCONDUCTORS [J].
HEDEGARD, P ;
PEDERSEN, MB .
PHYSICAL REVIEW B, 1990, 42 (16) :10035-10040
[10]  
HUANG K, 1963, STATISTICAL MECHANIC