欢迎登录材料期刊网

材料期刊网

高级检索

采用带有RHEED的MBE技术,利用RHEED图像演变实时监控薄膜生长状况,通过RHEED强度振荡测算薄膜生长速率,在GaAs (001)基片上同质外延GaAs薄膜.利用STM对MBE生长的GaAs薄膜表面的熟化过程进行了深入研究.研究发现,随着退火时间的延长,刚完成生长的GaAs表面从具有大量岛和坑的粗糙表面逐渐熟化,在熟化过程中岛不断合并扩大并与平台结合,而坑却逐渐消失.指出当熟化过程完成后GaAs表面将进入原子级平坦状态,并详细解释了熟化过程GaAs表面各种形貌特征形成的内在原因.

参考文献

[1] 冯 端;师昌绪;刘治国.材料科学导论[M].北京:化学工业出版社,2002:473-589.
[2] Andrew Zangwill.Physics at surface[M].Cambridge:Cambridge University Press,UK,1998:21-25.
[3] Frank Hausser;Axel Voigt .Ostwald ripening of two-dimensional homoepitaxial islands[J].Physical review, B. Condensed matter and materials physics,2005(3):035437.1-035437.11.
[4] Bartelt NC.;Tromp RM.;Theis W. .OSTWALD RIPENING OF TWO-DIMENSIONAL ISLANDS ON SI(001)[J].Physical Review.B.Condensed Matter,1996(16):11741-11751.
[5] X. W. Lou;Y. Wang;C. Yuan;J. Y. Lee;L. A. Archer .Template-Free Synthesis of SnO2 Hollow Nanostructures with High Lithium Storage Capacity[J].Advanced Materials,2006(17):2325-2329.
[6] 周 勋;杨再荣;罗子江 等.RHEED实时监控的MBE生长GaAs晶体衬底温度校准及表面相变的研究[J].物理学报,2011,60:016109.
[7] 罗子江,周勋,杨再荣,贺业全,何浩,邓朝勇,丁召.InGaAs/GaAs异质薄膜的MBE生长研究[J].功能材料,2011(05):846-849.
[8] Cho A Y .How molecular beam epitaxy began and its projection into the future[J].Journal of Crystal Growth,1999,11:201.
[9] Burlakov VM .Ostwald ripening in rarefied systems[J].Physical review letters,2006(15):5703-1-5703-4-0.
[10] Alloyeau D et al.Ostwald ripening in nanoalloys:when thermodynamics drives a size-dependent particle composition[J].Physical Review Letters,2010,105:255901.
[11] Prévot G .Ostwald ripening of three-dimensional clusters on a surface studied with an ultrafast kinetic Monte Carlo algorithm[J].Physical Review B:Condensed Matter,2011,84:045434.
[12] Ding Z.;Bullock DW.;Thibado PM.;LaBella VP.;Mullen K. .Atomic-scale observation of temperature and pressure driven preroughening and roughening - art. no. 216109[J].Physical review letters,2003(21):6109-0.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%