THE GROSS-NEVEU MODEL AS AN EFFECTIVE THEORY FOR POLYACETYLENE

被引：38

作者：

CHODOS, A ^{[1
]}

MINAKATA, H ^{[1
]}

机构：

[1] TOKYO METROPOLITAN UNIV,DEPT PHYS,HACHIOJI,TOKYO 19203,JAPAN

来源：

PHYSICS LETTERS A | 1994年 / 191卷 / 1-2期

关键词：

D O I：

10.1016/0375-9601(94)90557-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the Gross-Neveu model undergoes a first-order transition as a function of chemical potential, from the low-density phase in which chiral symmetry is spontaneously broken to the high-density phase in which the symmetry is restored. We apply this to polyacetylene, in which a charged-soliton-conducting to metallic phase transition has been observed as a function of doping level y. Our results are in excellent agreement with experiment; in particular, the critical value of y is well reproduced.

引用

页码：39 / 45

页数：7

共 15 条

[1] SOLITON EXCITATIONS IN POLYACETYLENE AND RELATIVISTIC FIELD-THEORY MODELS [J].

CAMPBELL, DK ;

BISHOP, AR .

NUCLEAR PHYSICS B, 1982, 200 (02) :297-328

[2] SOLITON LATTICE TO METAL - A 1ST ORDER PHASE-TRANSITION [J].

CHEN, J ;

CHUNG, TC ;

MORAES, F ;

HEEGER, AJ .

SOLID STATE COMMUNICATIONS, 1985, 53 (09) :757-763

[3] QED WITH A CHEMICAL-POTENTIAL - THE CASE OF A CONSTANT MAGNETIC-FIELD [J].

CHODOS, A ;

EVERDING, K ;

OWEN, DA .

PHYSICAL REVIEW D, 1990, 42 (08) :2881-2892

[4] DYNAMICAL SYMMETRY BREAKING IN ASYMPTOTICALLY FREE FIELD-THEORIES [J].

GROSS, DJ ;

NEVEU, A .

PHYSICAL REVIEW D, 1974, 10 (10) :3235-3253

[5] SOLITONS IN CONDUCTING POLYMERS [J].

HEEGER, AJ ;

KIVELSON, S ;

SCHRIEFFER, JR ;

SU, WP .

REVIEWS OF MODERN PHYSICS, 1988, 60 (03) :781-850

[6] THE GROSS-NEVEU MODEL AT FINITE TEMPERATURE AND DENSITY [J].

KARSCH, F ;

KOGUT, J ;

WYLD, HW .

NUCLEAR PHYSICS B, 1987, 280 (02) :289-303

[7]

KOBAYASHI Y, UNPUB THERMODYNAMICS

[8] FREE-CARRIERS IN HEAVILY DOPED POLYACETYLENE [J].

MARKOWITSCH, W ;

LEISING, G .

SYNTHETIC METALS, 1992, 51 (1-3) :25-29

[9] 1ST-ORDER TRANSITION TO A NOVEL METALLIC STATE IN [NAY+(CH)-Y]X - INSITU ELECTRON-SPIN RESONANCE DURING CHEMICAL AND ELECTROCHEMICAL DOPING [J].

MORAES, F ;

CHEN, J ;

CHUNG, TC ;

HEEGER, AJ .

SYNTHETIC METALS, 1985, 11 (4-5) :271-292

[10]

SHURYAK EV, 1980, PHYS REP, V61, P73

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