LATTICE CONTRACTION DRIVEN INSULATOR-METAL TRANSITION IN THE D=INFINITY LOCAL APPROXIMATION

被引：37

作者：

MAJUMDAR, P ^{[1
]}

KRISHNAMURTHY, HR ^{[1
]}

机构：

[1] JAWAHARLAL NEHRU CTR ADV SCI RES, BANGALORE 560012, INDIA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.73.1525

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effects of lattice contraction on insulator-metal transitions in strongly correlated systems, in the context of the d = infinity, iterated perturbation theory approximation for the half-filled Hubbard model. We compute the phase diagram in the pressure-temperature plane for the paramagnetic metal to paramagnetic insulator transition. We present results for conductivity jumps across the transition and for the variation in conductivity with pressure and temperature in either phase. Our results agree qualitatively with experimental data on transition metal oxides.

引用

页码：1525 / 1528

页数：4

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