Dielectric properties of V2O3 and (V0.989Cr0.011)2O3 from temperature-dependent ac impedance measurements

被引：1

作者：

Ma, Yongchang ^{[1
,2
]}

Li, Ang ^{[1
]}

Li, Yajun ^{[1
]}

Du, Li ^{[1
]}

Zhang, Chenguang ^{[1
,3
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Minist Educ, Key Lab Display Mat & Photoelect Devices, Tianjin 300384, Peoples R China

[3] Tianjin Key Lab Photoelect Mat & Devices, Tianjin 300384, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 07期

关键词：

ELECTRICAL-PROPERTIES; INSULATOR-TRANSITION; CRYSTAL-STRUCTURE; MOTT TRANSITION; METAL; PHASE; SCATTERING;

D O I：

10.1103/PhysRevB.107.075125

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dielectric properties of the various insulating phases in pure V2O3 and (V0.989Cr0.011)2O3 crystals have been investigated. Large dielectric constants on the scale of 103 were obtained, which were attributed to the backflow effect of normal carriers and also the periodic charge configuration relevant to V-V dimers in an antiferromagnetic insulating state or the bond contraction of V-Cr-V in a paramagnetic insulating phase. We propose that if Cr dopants are arranged nearly uniformly, the charge density of (V0.989Cr0.011)2O3 in the paramagnetic insulating phase will exhibit a doping-induced wavelike distribution in real space, and thus the polarization of the system will be enhanced.

引用

页数：8

共 49 条

[1] OPTICAL PROPERTIES OF V203 DOPED WITH CHROMIUM [J].

BARKER, AS ;

REMEIKA, JP .

SOLID STATE COMMUNICATIONS, 1970, 8 (19) :1521-&

[2] Crystal structure of the low-temperature antiferromagnetic phase of V2O3 [J].

Dernier, P. D. ;

Marezio, M. .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (09) :3771-3776

[3] CRYSTAL STRUCTURE OF V2O3 AND METAL-INSULATOR TRANSITION [J].

DERNIER, PD .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1970, 31 (11) :2569-&

[4] Memory Metamaterials [J].

Driscoll, T. ;

Kim, Hyun-Tak ;

Chae, Byung-Gyu ;

Kim, Bong-Jun ;

Lee, Yong-Wook ;

Jokerst, N. Marie ;

Palit, S. ;

Smith, D. R. ;

Di Ventra, M. ;

Basov, D. N. .

SCIENCE, 2009, 325 (5947) :1518-1521

[5] THE DETERMINATION OF THE ELASTIC FIELD OF AN ELLIPSOIDAL INCLUSION, AND RELATED PROBLEMS [J].

ESHELBY, JD .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1957, 241 (1226) :376-396

[6] FLUX GROWTH OF V2O3 SINGLE-CRYSTALS BY REDUCTION OF V2O5 IN A GRAPHITE CRUCIBLE [J].

FOGUEL, M ;

GRAJOWER, R .

JOURNAL OF CRYSTAL GROWTH, 1971, 11 (03) :280-+

[7]

Frandsen B. A., PHYS REV B

[8] BUCKLED CRYSTALLINE-STRUCTURE OF MIXED IONIC SALTS [J].

FRENKEL, A ;

STERN, EA ;

VORONEL, A ;

QIAN, M ;

NEWVILLE, M .

PHYSICAL REVIEW LETTERS, 1993, 71 (21) :3485-3488

[9] Strain-induced bond buckling and its role in insulating properties of Cr-doped V2O3 [J].

Frenkel, A. I. ;

Pease, D. M. ;

Budnick, J. I. ;

Metcalf, P. ;

Stern, E. A. ;

Shanthakumar, P. ;

Huang, T. .

PHYSICAL REVIEW LETTERS, 2006, 97 (19)

[10]

Goodenough J. B., 1971, ANNU REV MATER SCI, V1, P101, DOI DOI 10.1146/ANNUREV.MS.01.080171.000533

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