Role of structural evolution in the quantum conductance behavior of gold nanowires during stretching

被引:67
作者
Rego, LGC
Rocha, AR
Rodrigues, V
Ugarte, D
机构
[1] Lab Nacl Luz Sincrotron, BR-13084971 Campinas, SP, Brazil
[2] Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
来源
PHYSICAL REVIEW B | 2003年 / 67卷 / 04期
关键词
D O I
10.1103/PhysRevB.67.045412
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Gold nanowires generated by mechanical stretching have been shown to adopt only three kinds of configurations where their atomic arrangements adjust such that either the [100], [111], or [110] zone axis lies parallel to the elongation direction. We have analyzed the relationship between structural rearrangements and electronic transport behavior during the elongation of Au nanowires for each of the three possibilities. We have used two independent experiments to tackle this problem: high-resolution transmission electron microscopy to observe the atomic structure and a mechanically controlled break junction to measure the transport properties. We have estimated the conductance of nanowires using a theoretical method based on the extended Huckel theory that takes into account the atom species and their positions. Aided by these calculations, we have consistently connected both sets of experimental results and modeled the evolution process of gold nanowires whose conductance lies within the first and third conductance quanta. We have also presented evidence that carbon acts as a contaminant, lowering the conductance of one-atom-thick wires.
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页数:10
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共 35 条
[1]  
[Anonymous], INTRO APPL QUANTUM C
[2]   Chain formation of metal atoms [J].
Bahn, SR ;
Jacobsen, KW .
PHYSICAL REVIEW LETTERS, 2001, 87 (26) :266101-1
[3]   QUANTIZED CONDUCTANCE IN ATOM-SIZED WIRES BETWEEN 2 METALS [J].
BRANDBYGE, M ;
SCHIOTZ, J ;
SORENSEN, MR ;
STOLTZE, P ;
JACOBSEN, KW ;
NORSKOV, JK ;
OLESEN, L ;
LAEGSGAARD, E ;
STENSGAARD, I ;
BESENBACHER, F .
PHYSICAL REVIEW B, 1995, 52 (11) :8499-8514
[4]   CONDITIONS FOR CONDUCTANCE QUANTIZATION IN REALISTIC MODELS OF ATOMIC-SCALE METALLIC CONTACTS [J].
BRATKOVSKY, AM ;
SUTTON, AP ;
TODOROV, TN .
PHYSICAL REVIEW B, 1995, 52 (07) :5036-5051
[5]   GENERALIZED MANY-CHANNEL CONDUCTANCE FORMULA WITH APPLICATION TO SMALL RINGS [J].
BUTTIKER, M ;
IMRY, Y ;
LANDAUER, R ;
PINHAS, S .
PHYSICAL REVIEW B, 1985, 31 (10) :6207-6215
[6]   How do gold nanowires break? [J].
da Silva, EZ ;
da Silva, AJR ;
Fazzio, A .
PHYSICAL REVIEW LETTERS, 2001, 87 (25) :256102-1
[7]  
DURIG U, 1996, NATO ADV STUDIES I E, V340, P275
[8]   Theoretical study of electrical conduction through a molecule connected to metallic nanocontacts [J].
Emberly, EG ;
Kirczenow, G .
PHYSICAL REVIEW B, 1998, 58 (16) :10911-10920
[9]   Electron standing-wave formation in atomic wires [J].
Emberly, EG ;
Kirczenow, G .
PHYSICAL REVIEW B, 1999, 60 (08) :6028-6033
[10]  
Ferry DK, 1997, TRANSPORT NANOSTRUCT