Existence of a ferroelectric ground state with a spontaneous polarization in the Falicov-Kimball model

被引：27

作者：

Farkasovsky, P ^{[1
]}

机构：

[1] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.59.9707

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The extrapolation of small-cluster exact-diagonalization calculations is used to examine the possibility of electronic ferroelectricity in the one-dimensional spinless and spin-one-half Falicov-Kimball model (FKM). It is found that neither the spinless nor the spin-one-half version of the FKM allows for a ferroelectric ground state with a spontaneous polarization, i.e., there is no nonvanishing (d(+)f) expectation value for vanishing hybridization V. [S0163-1829(99)05015-8].

引用

页码：9707 / 9709

页数：3

共 11 条

[1]

CZYCHOLL G, UNPUB

[2] CORRELATED ELECTRONS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

DAGOTTO, E .

REVIEWS OF MODERN PHYSICS, 1994, 66 (03) :763-840

[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-KIMBALL MODEL AND THE PROBLEM OF VALENCE AND METAL-INSULATOR TRANSITIONS [J].

FARKASOVSKY, P .

PHYSICAL REVIEW B, 1995, 51 (03) :1507-1512

[5] Electronic phase transitions in the spin-1/2 Falicov-Kimball model [J].

Farkasovsky, P .

PHYSICAL REVIEW B, 1996, 54 (16) :11261-11264

[6] The role of hybridization on valence transitions in the spinless Falicov-Kimball model [J].

Farkasovsky, P .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1997, 104 (03) :553-557

[7] PRESSURE-INDUCED INSULATOR-METAL TRANSITIONS IN THE SPINLESS FALICOV-KIMBALL MODEL [J].

FARKASOVSKY, P .

PHYSICAL REVIEW B, 1995, 52 (08) :R5463-R5466

[8]

Gruber C, 1996, HELV PHYS ACTA, V69, P850

[9] Theory of electronic ferroelectricity [J].

Portengen, T ;

Ostreich, T ;

Sham, LJ .

PHYSICAL REVIEW B, 1996, 54 (24) :17452-17463

[10] Boundary effects on electronic ferroelectricity [J].

Portengen, T ;

Sham, LJ .

SUPERLATTICES AND MICROSTRUCTURES, 1998, 23 (3-4) :531-537

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