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Cu 表面性质的第一性原理分析

舒瑜 张研 张建民

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Cu 表面性质的第一性原理分析

舒瑜, 张研, 张建民

First-principles analysis of properties of Cu surfaces

Shu Yu, Zhang Yan, Zhang Jian-Min
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  • 采用第一性原理赝势平面波方法, 计算并详细分析了面心立方Cu晶体及其 (100), (110) 和 (111) 这3个低指数表面的原子结构、 表面能量及表面电子态密度. 表面能的计算结果表明, Cu (111) 表面的结构稳定性最好, Cu (100) 表面次之, Cu (110)表面的结构稳定性最差. 3个表面的表面原子弛豫量随着层数的增加而逐渐减弱. Cu (110) 表面的最表层原子相对收缩最大, Cu (100)表面次之, Cu (111) 表面的最表层原子相对收缩最小. 表面原子弛豫不仅引起表面几何结构的变化, 而且使表面层原子的电子态密度峰形相对晶体内部发生变化, 这是表面能产生的主要原因, 而Cu (110)表面相对于Cu (100)与Cu (111)表面具有高表面活性的主要原因则源于其表面层原子电子态密度在高能级处的波峰相对晶体内部显著的升高.
    Using first-principles pseudopotential plane wave method, the energy, atomic geometry and electronic density of states of FCC Cu crystal and its (111), (110) and (100) surface models were calculated and analyzed. According to the calculated results of the surface energy, the structural stability of the Cu surfaces increases for Cu (110), Cu (100), Cu (111) surfaces successively. The relaxation extent of the surface atoms decreases successively with the increasing the number of the layers. For the inwards relaxation of the surface layer atoms, Cu (110) surface moves maximum, Cu (100) takes second place, Cu (111) surface moves least. It was found that the relaxation of the surface atom layers not only causes the change of geometrical structures of the surface models but also leads to the change of peak contour of density of states (DOS) of surface layer atoms comparing with crystal inside. The increment of the total energy caused by these change is the main reason of the surface energy. And that the Cu (110) surface having higher activity than that of Cu(111) and Cu(100) surfaces may be attributed to its apparent rising of the surface layer atoms DOS in the high energy level.
    • 基金项目: 国家重点基础研究发展计划(批准号: 2010CB631002)和国家自然科学基金(批准号: 51071098)资助的课题.
    • Funds: Project supported by the State Key Development for Basic Research of China (Grant No. 2010CB631002), and the National Natural Science Foundation of China (Grant No. 51071098).
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    DesjonquèresMC, Spanjaard D 1995 Concepts in Surface Science (New York: Springer Press) p1

    [2]

    Kittel C 1996 Introduction to Solid State Physics 7th Ed (New York: Wiley Press) p152

    [3]

    Smith C J 1976 Metals Reference Book (5th Ed.) (London: Butterworrd Press ) p186

    [4]

    Davis H L, Noonan J R 1983 Surf. Sci. 126 245

    [5]

    Noonan J R, Davis H L 1982 Bull. Am. Phys. Soc. 27 237

    [6]

    Lind D M, Dunning F B, Walters G K, Davis H L 1987 Phys. Rev. B 35 9037

    [7]

    Adams D L, Nielsen H B, Andersen J N 1983 Surf. Sci. 128 294

    [8]

    Davis H L, Noonan J R, Jenkins L H 1979 Surf. Sci. 83 559

    [9]

    Noonan J R, Davis H L 1980 Surf. Sci. 99, L424

    [10]

    Tear S P, Röll K, Prutton M 1981 J. Phys. C 14 3297.

    [11]

    Lindgren S Å , Wallde? L, Rundgren J, Westrin P 1984 Phys. Rev. B 29 576

    [12]

    Bartoš I, Jaroš P, Barbieri A, van Hove M A, Chung W F, Cal Q, Altman M S 1995 Surf. Sci. Lett. 2 477

    [13]

    Tyson W R, Miller W A 1977 Surf. Sci. 62 267

    [14]

    de Boer F R, Boom R, MattensWC M, Miedema A R, Niessen A K 1988 Cohesion in Metals (Amsterdam: North-Holland Press)

    [15]

    Domain C, Becquart C S 2002 Phys. Rev. B 65 024103

    [16]

    Khein A, Singh D J, Umrigar C J 1995 Phys. Rev. B 51 4105

    [17]

    Da Silva J L F 2002 Ph. D. Dissertation (Berlin: Technical University Berlin, Germany)

    [18]

    Da Silva J L F, Schroeder K, Blügel S 2004 Phys. Rev. B 69 245411

    [19]

    Rodach T, Bohnen K P, Ho K M 1993 Surf. Sci. 286 66

    [20]

    Foiles S M, Baskes M I, Daw M S 1986 Phys. Rev. B 33 7983

    [21]

    Sinnott S B, Stave M S, Raeker T J, de Pristo A E 1991 Phys. Rev. B 44 8927

    [22]

    Ross C, Schirmer B, Wuttig M, Gauthier Y, Bihlmayer G, Blügel S 1998 Phys. Rev. B 57 2607

    [23]

    Sklyadneva I Y, Rusina G G, Chulkov E V 1998 Surf. Sci. 416 17

    [24]

    Da Silva J L F, Barreteau C, Schroeder K, Schroeder K, Blügel S 2006 Phys. Rev. B 73 125402

    [25]

    Galanakis I, Bihlmayer G, Bellini V, Papanikolaou N, Zeller R, Blögel S, Dederichs P H 2002 Europhys. Lett. 58 751

    [26]

    Skriver H L, Rosengaard N M 1992 Phys. Rev. B 46 7157

    [27]

    Vitos L, Skriver H L, Kollár J 1999 Surf. Sci. 425 212

    [28]

    Tian Z J, Rahman T S 1993 Phys. Rev. B 47 9751

    [29]

    Raouafi F, Barreteau C, Desjonquères M C, Spanjaard D 2002 Surf. Sci. 505 183

    [30]

    Wan J, Shen S G, Fan X Q 1997 Acta Phys. Sin. 46 1161 (in Chinese) [万钧, 申三国, 范希庆 1997 物理学报 46 1161]

    [31]

    Zhang J M, Li H Y, Xu K W 2006 J. Phys. Chem. Solids 67 1623

    [32]

    Kresse G, Hafner J 1993 Phys. Rev. B 47 558

    [33]

    Kresse G, Hafner J 1994 Phys. Rev. B 49 14251

    [34]

    Kresse G, Furthmüller J 1996 Comput. Mater. Sci. 6 15

    [35]

    Kresse G, Furthmüller J 1996 Phys. Rev. B 54 11169

    [36]

    Kresse G, Joubert D 1999 Phys. Rev. B 59 1758

    [37]

    Perdew J, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865

    [38]

    Monkhorst H J, Pack J D 1976 Phys. Rev. B 13 5390

    [39]

    Xiao J M, Zhu F W 1999 Energetics of Materials (Shanghai: Shanghai Science and Technology Press) p417 (in Chinese) [肖纪美, 朱逢吾 1999 材料能量学 (上海: 上海科学技术出版社) 第417页]

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出版历程
  • 收稿日期:  2010-12-14
  • 修回日期:  2011-04-25
  • 刊出日期:  2012-01-05

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