Settling the "Dead Layer" Debate in Nanoscale Capacitors

被引:90
作者
Chang, Li-Wu [1 ]
Alexe, Morin [2 ]
Scott, James F. [3 ]
Gregg, J. Marty [1 ]
机构
[1] Queens Univ Belfast, Sch Math & Phys, Ctr Nanostruct Media, Belfast BT7 1NN, Antrim, North Ireland
[2] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany
[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
基金
英国工程与自然科学研究理事会;
关键词
THIN-FILM CAPACITORS; THICKNESS DEPENDENCE; DIELECTRIC RESPONSE; FERROELECTRICS; (BA; SR)TIO3; MEMORY; FIELD; SIZE;
D O I
10.1002/adma.200901756
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Permittivity peaks in single crystal thin film capacitors are strongly suppressed compared to bulk in the case of Pt/SrTiO3/Pt, but are relatively unaffected in Pt/BaTiO3/Pt structures. This is consistent with the recent suggestion that subtle variations in interfacial bonding between the dielectric and electrode are critical in determining the presence or absence of inherent dielectric "dead layers".
引用
收藏
页码:4911 / +
页数:5
相关论文
共 31 条
[1]   The dielectric response as a function of temperature and film thickness of fiber-textured (Ba,Sr)TiO3 thin films grown by chemical vapor deposition [J].
Basceri, C ;
Streiffer, SK ;
Kingon, AI ;
Waser, R .
JOURNAL OF APPLIED PHYSICS, 1997, 82 (05) :2497-2504
[2]   Smearing of phase transition due to a surface effect or a bulk inhomogeneity in ferroelectric nanostructures [J].
Bratkovsky, AM ;
Levanyuk, AP .
PHYSICAL REVIEW LETTERS, 2005, 94 (10)
[3]   The effect of flexoelectricity on the dielectric properties of inhomogeneously strained ferroelectric thin films [J].
Catalan, G ;
Sinnamon, LJ ;
Gregg, JM .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (13) :2253-2264
[4]   Size effects on thin film ferroelectrics: Experiments on isolated single crystal sheets [J].
Chang, L. W. ;
McMillen, M. ;
Morrison, F. D. ;
Scott, J. F. ;
Gregg, J. M. .
APPLIED PHYSICS LETTERS, 2008, 93 (13)
[5]   The influence of point defects and inhomogeneous strain on the functional behavior of thin film ferroelectrics [J].
Chang, L. W. ;
McMillen, M. ;
Gregg, J. M. .
APPLIED PHYSICS LETTERS, 2009, 94 (21)
[6]   Evaluation of tailored electrode (Ba,Sr)RuO3 for (Ba,Sr)TiO3 [J].
Choi, DK ;
Kim, BS ;
Son, SY ;
Oh, SH ;
Park, KW .
JOURNAL OF APPLIED PHYSICS, 1999, 86 (06) :3347-3351
[7]   Depolarization corrections to the coercive field in thin-film ferroelectrics [J].
Dawber, M ;
Chandra, P ;
Littlewood, PB ;
Scott, JF .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (24) :L393-L398
[8]  
DIMOS D, 1995, ANNU REV MATER SCI, V25, P273
[9]   Ferroelectricity in asymmetric metal-ferroelectric-metal heterostructures: A combined first-principles-phenomenological approach [J].
Gerra, G. ;
Tagantsev, A. K. ;
Setter, N. .
PHYSICAL REVIEW LETTERS, 2007, 98 (20)
[10]   Ionic polarizability of conductive metal oxides and critical thickness for ferroelectricity in BaTiO3 [J].
Gerra, G ;
Tagantsev, AK ;
Setter, N ;
Parlinski, K .
PHYSICAL REVIEW LETTERS, 2006, 96 (10)