Giant electroresistance in ferroelectric tunnel junctions

被引：648

作者：

Zhuravlev, MY ^{[1
]}

Sabirianov, RF

Jaswal, SS

Tsymbal, EY

机构：

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Dept Phys, Omaha, NE 68182 USA

[3] Univ Nebraska, Ctr Mat Res & Anal, Lincoln, NE 68588 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.94.246802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The interplay between the electron transport in metal-ferroelectric-metal junctions with ultrathin ferroelectric barriers and the polarization state of a barrier is investigated. Using a model which takes into account screening of polarization charges in metallic electrodes and direct quantum tunneling across a ferroelectric barrier, we calculate the change in the tunneling conductance associated with the polarization switching. We find the conductance change of a few orders of magnitude for metallic electrodes with significantly different screening lengths. This giant electroresistance effect is the consequence of a different potential profile seen by transport electrons for the two opposite polarization orientations.

引用

页数：4

共 9 条

[1]

Ashcroft N. W., 1976, Solid State Physics, P340

[2] Two-dimensional ferroelectric films [J].

Bune, AV ;

Fridkin, VM ;

Ducharme, S ;

Blinov, LM ;

Palto, SP ;

Sorokin, AV ;

Yudin, SG ;

Zlatkin, A .

NATURE, 1998, 391 (6670) :874-877

[3] Resistive switching in metal-ferroelectric-metal junctions [J].

Contreras, JR ;

Kohlstedt, H ;

Poppe, U ;

Waser, R ;

Buchal, C ;

Pertsev, NA .

APPLIED PHYSICS LETTERS, 2003, 83 (22) :4595-4597

[4]

Duke C. B., 1969, Tunneling in Solids

[5] Ferroelectricity in ultrathin perovskite films [J].

Fong, DD ;

Stephenson, GB ;

Streiffer, SK ;

Eastman, JA ;

Auciello, O ;

Fuoss, PH ;

Thompson, C .

SCIENCE, 2004, 304 (5677) :1650-1653

[6] Critical thickness for ferroelectricity in perovskite ultrathin films [J].

Junquera, J ;

Ghosez, P .

NATURE, 2003, 422 (6931) :506-509

[7] Ferroelectricity revisited - Advances in materials and physics [J].

Samara, GA .

SOLID STATE PHYSICS, VOL 56, 2001, 56 :239-458

[8] The properties of ferroelectric films at small dimensions [J].

Shaw, TM ;

Trolier-McKinstry, S ;

McIntyre, PC .

ANNUAL REVIEW OF MATERIALS SCIENCE, 2000, 30 :263-298

[9] Fundamental size limits in ferroelectricity [J].

Spaldin, NA .

SCIENCE, 2004, 304 (5677) :1606-1607

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