THERMODYNAMIC MODEL OF THE INSULATOR-METAL TRANSITION IN NICKEL IODIDE

被引：14

作者：

FREERICKS, JK

FALICOV, LM

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.45.1896

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model calculation of the phase diagram for the isostructural insulator-metal phase transition of nickel iodide is presented. The system is modeled by the Falicov-Kimball Hamiltonian with the calculated band structure of NiL2 and (Ising) spin-spin interactions, but neglects all hybridization effects between nickel 3d and iodine 5p bands. Many-body interactions and spin superexchange are both treated in mean-field theory. The results include second-order antiferromagnetic-paramagnetic insulator transitions, first-order insulator-metal transitions, and a (as yet unobserved and probably unobservable) classical critical point. The calculated phase diagram and transport properties agree well with the recent experimental results.

引用

页码：1896 / 1899

页数：4

共 12 条

[1] STUDY OF THE ELECTRONIC-STRUCTURE OF NICL2, COCL2, FECL2, AND MNCL2 BY THE INTERSECTING-SPHERES MODEL [J].

ANTOCI, S ;

MIHICH, L .

PHYSICAL REVIEW B, 1980, 21 (08) :3383-3388

[2]

ANTONICI S, 1979, PHYS REV B, V18, P5768

[3] SIMPLE MODEL FOR SEMICONDUCTOR-METAL TRANSITIONS - SMB6 AND TRANSITION-METAL OXIDES [J].

FALICOV, LM ;

KIMBALL, JC .

PHYSICAL REVIEW LETTERS, 1969, 22 (19) :997-&

[4]

FALICOV LM, 1972, SOLID STATE COMMUN, V10, P445

[5] THEORY OF PRESSURE-INDUCED MAGNETIC AND METAL-INSULATOR TRANSITIONS [J].

GIESEKUS, A ;

FALICOV, LM .

PHYSICAL REVIEW B, 1991, 44 (19) :10449-10454

[6] MAGNETIC AND STRUCTURAL INVESTIGATIONS ON NII2 AND COI2 [J].

KUINDERSMA, SR ;

SANCHEZ, JP ;

HAAS, C .

PHYSICA B & C, 1981, 111 (2-3) :231-248

[7]

Mott N. F., 1974, METAL INSULATOR TRAN

[8] PRESSURE-INDUCED METALLIZATION AND THE COLLAPSE OF THE MAGNETIC STATE IN THE ANTIFERROMAGNETIC INSULATOR NII2 [J].

PASTERNAK, MP ;

TAYLOR, RD ;

CHEN, A ;

MEADE, C ;

FALICOV, LM ;

GIESEKUS, A ;

JEANLOZ, R ;

YU, PY .

PHYSICAL REVIEW LETTERS, 1990, 65 (06) :790-793

[9] THEORY OF ALPHA-GAMMA PHASE TRANSITION IN METALLIC CERIUM [J].

RAMIREZ, R ;

FALICOV, LM .

PHYSICAL REVIEW B-SOLID STATE, 1971, 3 (08) :2425-&

[10] Metal-insulator transitions: A simple theoretical model [J].

Ramirez, Ricardo ;

Falicov, L. M. ;

Kimball, J. C. .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (08) :3383-3393

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