EXACT AND ADIABATIC SOLUTIONS FOR A SPINLESS PEIERLS-HUBBARD MODEL IN A FINITE CLUSTER

被引：2

作者：

CARDENAS, M

GOTTLIEB, D

ROSSLER, J

机构：

[1] Departamento de Fisica, Facultad de Ciencias, Universidad de Chile, Santiago

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.48.10719

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exact solution of the Hubbard-Peierls model is given in a cluster of six atoms and three spinless electrons. Phonons with wave vector k = pi are retained and quantum mechanically analyzed. Energy level and several averages are evaluated, thus determining the physical properties of the model in terms of the parameters of the system. The regime of the distorted lattice is obtained. The exact and Born-Oppenheimer (BO) results are compared, concluding that the BO enhances quantum fluctuations; this peculiar behavior is explained.

引用

页码：10719 / 10727

页数：9

共 28 条

[1] ELECTRON-ELECTRON INTERACTION EFFECTS ON PEIERLS DIMERIZATION IN A HALF-FILLED BAND [J].

DIXIT, SN ;

MAZUMDAR, S .

PHYSICAL REVIEW B, 1984, 29 (04) :1824-1839

[2] GROUND-STATE ENERGY OF A MOLECULE IN ADIABATIC APPROXIMATION [J].

EPSTEIN, ST .

JOURNAL OF CHEMICAL PHYSICS, 1966, 44 (02) :836-&

[3]

FALICOV L, 1989, PHYS REV B, V39, P7545

[4] PHASE-DIAGRAM OF ONE-DIMENSIONAL ELECTRON-PHONON SYSTEMS .1. THE SU-SCHRIEFFER-HEEGER MODEL [J].

FRADKIN, E ;

HIRSCH, JE .

PHYSICAL REVIEW B, 1983, 27 (03) :1680-1697

[5]

FRADKIN E, 1983, PHYS REV B, V27, P4302

[6] PEIERLS INSTABILITY IN SPINLESS ONE-DIMENSIONAL CONDUCTORS [J].

GAGLIANO, ER ;

PROETTO, CR ;

BALSEIRO, CA .

PHYSICAL REVIEW B, 1987, 36 (04) :2257-2262

[7] PEIERLS TRANSITION IN HELICAL STRUCTURES [J].

GOTTLIEB, D ;

MELO, F .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS, 1988, 10 (12) :1427-1437

[8] SOLITONS IN POLYACETYLENE - A MONTE-CARLO STUDY [J].

HIRSCH, JE ;

GRABOWSKI, M .

PHYSICAL REVIEW LETTERS, 1984, 52 (19) :1713-1716

[9] EFFECT OF QUANTUM FLUCTUATIONS ON THE PEIERLS INSTABILITY - A MONTE-CARLO STUDY [J].

HIRSCH, JE ;

FRADKIN, E .

PHYSICAL REVIEW LETTERS, 1982, 49 (06) :402-405

[10] 2PF AND 4PF INSTABILITIES IN THE ONE-DIMENSIONAL HUBBARD-MODEL [J].

HIRSCH, JE ;

SCALAPINO, DJ .

PHYSICAL REVIEW B, 1984, 29 (10) :5554-5561

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