Atomic EXAFS: evidence for photoelectron backscattering by interstitial charge densities

被引：12

作者：

Wende, H ^{[1
]}

Baberschke, K ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Phys Expt, D-14195 Berlin, Germany

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1999年 / 101卷

关键词：

surface extended X-ray absorption fine structure; adsorbate-substrate bonding;

D O I：

10.1016/S0368-2048(98)00431-9

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We present further evidence for backscattering of photoelectrons at interstitial charge densities. Two low-Z adsorbate-metal systems, namely (2x3)N/Cu(110) and (root 2X2 root 2)R45 degrees O/Cu(100), show clear evidence of atomic EXAFS. Directional bonding which is a characteristic of these two reconstructed systems is most likely to be the reason for the strong AXAFS found in the experimental data. Moreover, it turns out that low-Z adsorbates are ideal candidates to study such a phenomenon as multielectron excitations do not interfere with the AXAFS oscillations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：821 / 826

页数：6

共 11 条

[1]

ATKINS PW, 1988, PHYSICAL CHEM

[2] ATOMIC BACKGROUND IN X-RAY-ABSORPTION SPECTRA OF 5TH-PERIOD ELEMENTS - EVIDENCE FOR DOUBLE-ELECTRON EXCITATION EDGES [J].

FILIPPONI, A ;

DICICCO, A .

PHYSICAL REVIEW A, 1995, 52 (02) :1072-1078

[3] X-ray-absorption fine structure in embedded atoms - Comment [J].

Filipponi, A ;

DiCicco, A .

PHYSICAL REVIEW B, 1996, 53 (14) :9466-9467

[4] ATOMIC ORIGIN OF STRUCTURE IN EXAFS EXPERIMENTS [J].

HOLLAND, BW ;

PENDRY, JB ;

PETTIFER, RF ;

BORDAS, J .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1978, 11 (03) :633-642

[5] ADSORPTION OF OXYGEN ON CU(100) .1. LOCAL-STRUCTURE AND DYNAMICS FOR 2 ATOMIC CHEMISORPTION STATES [J].

LEDERER, T ;

ARVANITIS, D ;

COMELLI, G ;

TROGER, L ;

BABERSCHKE, K .

PHYSICAL REVIEW B, 1993, 48 (20) :15390-15404

[6] ANALYSIS OF DAFS FINE-STRUCTURE AND BACKGROUND [J].

RAVEL, B ;

NEWVILLE, M ;

CROSS, JO ;

BOULDIN, CE .

PHYSICA B, 1995, 208 (1-4) :145-147

[7] X-RAY-ABSORPTION FINE-STRUCTURE IN EMBEDDED ATOMS [J].

REHR, JJ ;

BOOTH, CH ;

BRIDGES, F ;

ZABINSKY, SI .

PHYSICAL REVIEW B, 1994, 49 (17) :12347-12350

[8] Bond length and adsorbate vibrations of (2x3)N/Cu(110): A SEXAFS study [J].

Wende, H ;

Arvanitis, D ;

Tischer, M ;

Chauvistre, R ;

Henneken, H ;

May, F ;

Baberschke, K .

PHYSICAL REVIEW B, 1996, 54 (08) :5920-5926

[9] Evidence for photoelectron backscattering by interstitial charge densities [J].

Wende, H ;

Srivastava, P ;

Chauvistre, R ;

May, F ;

Baberschke, K ;

Arvanitis, D ;

Rehr, JJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (31) :L427-L433

[10] Surface atomic-XAFS for nitrogen atoms on copper [J].

Wende, H ;

Arvanitis, D ;

Tischer, M ;

Chauvistre, R ;

Henneken, H ;

May, F ;

Baberschke, K .

JOURNAL DE PHYSIQUE IV, 1997, 7 (C2) :211-212

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