MULTILAYER RELAXATION OF THE MG(0001) SURFACE

被引:51
作者
SPRUNGER, PT
POHL, K
DAVIS, HL
PLUMMER, EW
机构
[1] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831
[2] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996
关键词
D O I
10.1016/0039-6028(93)90004-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We have investigated the interplanar relaxation of the clean (0001)-(1 x 1) surface of magnesium at 100 K using a dynamical LEED I-V analysis. In contrast to almost all other metal surfaces, an expansion has been observed for the first interlayer spacing of this clean surface. Using an extended database, the results indicate that the first three interlayer spacings are relaxed from the bulk value by: DELTAd12 = +1.9 +/- 0.3%, DELTAd23 = +0.8 +/- 0.4%, and DELTAd34 = -0.4 +/- 0.5%. A comparison of this observed multilayer relaxation with experimental and theoretical results for similar free-electron closepacked metal surfaces, e.g. Al(111), suggests that a surface expansion is a normal property of high electron density simple metals.
引用
收藏
页码:L48 / L54
页数:7
相关论文
共 34 条
[1]   MULTILAYER LATTICE-RELAXATION AT METAL-SURFACES - A TOTAL-ENERGY MINIMIZATION [J].
BARNETT, RN ;
LANDMAN, U ;
CLEVELAND, CL .
PHYSICAL REVIEW B, 1983, 28 (04) :1685-1695
[2]   BISMUTH INDUCED STRUCTURES ON COPPER(100) [J].
BLUM, B ;
PLUMMER, EW ;
DAVIS, HL ;
ZEHNER, DM .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1991, 9 (03) :1703-1706
[3]   LASER VAPORIZATION OF BERYLLIUM - GAS-PHASE SPECTRUM AND MOLECULAR-POTENTIAL OF BE2 [J].
BONDYBEY, VE ;
ENGLISH, JH .
JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (01) :568-570
[4]  
CHATILLON C, 1975, CR ACAD SCI C CHIM, V280, P1505
[5]   ANOMALOUS RELAXATIONS OF (0001) AND (1010) SURFACES IN HCP METALS [J].
CHEN, SP .
SURFACE SCIENCE, 1992, 264 (1-2) :L162-L168
[6]   ABINITIO STUDY OF THE STRUCTURAL-PROPERTIES OF MAGNESIUM [J].
CHOU, MY ;
COHEN, ML .
SOLID STATE COMMUNICATIONS, 1986, 57 (10) :785-788
[7]   EQUIVALENT BEAM AVERAGING (EBA) OF IV SPECTRA FOR LEED ANALYSIS [J].
DAVIS, HL ;
NOONAN, JR .
PHYSICA SCRIPTA, 1983, T4 :141-143
[8]   ANOMALOUS INTERPLANAR EXPANSION AT THE (0001) SURFACE OF BE [J].
DAVIS, HL ;
HANNON, JB ;
RAY, KB ;
PLUMMER, EW .
PHYSICAL REVIEW LETTERS, 1992, 68 (17) :2632-2635
[9]   LATTICE-RELAXATION AT AN ALUMINUM SURFACE - SELF-CONSISTENT LINEAR-ELECTRONIC-RESPONSE APPROACH [J].
EGUILUZ, AG .
PHYSICAL REVIEW B, 1987, 35 (11) :5473-5486
[10]   1ST-PRINCIPLES CALCULATION OF THE GEOMETRIC AND ELECTRONIC-STRUCTURE OF THE BE(0001) SURFACE [J].
FEIBELMAN, PJ .
PHYSICAL REVIEW B, 1992, 46 (04) :2532-2539