123B_1_EE 123B W 11 lect 2 Chaps 1,2

123B_1_EE 123B W 11 lect 2 Chaps 1,2 - Chapter 1 Crystal...

Info icon This preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1. Crystal Structure Lecture 2 January 6, 2011
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Quiz #1: 1. From periodic table, why is Ga, Al, In called “column III” atoms and P, As, Sb atoms called “column V”.
Image of page 2
Periodic Table 3 5 valence e - 3 valence e - 8 e - is a complete shell •1 Ga atom bonds to 3 As atoms
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Crystal Growth – Epitaxy 4 GaAs Ga As Substrate MBE sample holder
Image of page 4
2. We discussed epitaxy briefly and related the importance of lattice size to high quality crystal formation. Please list the following compounds in order of lattice constant:, AlAs, GaSb, GaP,GaAs.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Planes in a Crystal (233) To describe this plane: Find intercept: 3a 1 , 2a 2 , 2a 3 or 3,2,2 Take reciprocal: 1/3, ½, ½ Represent as smallest integers: (2,3,3) Called ( h k l ) ≡ index of plane Second example Intercepts are: 4,1,2 (4,1,2) (1/4, 1, 1/2) (1, 4, 2) = (h k l) 2 1 2 1 1 2 3 â 1 â 2 â 3
Image of page 6
Equilibrium crystal shape in nanopatterned epitaxy Faceting is determined by growth rate and mask. Low energy planes require more time to reach equilibruim. P. Wong, accepted JAP (2007) Pyramid A Pyramid B Pyramid C Pyramid A Pyramid B Pyramid C
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
3. Draw the (111) crystal plane on an x, y, z axis.
Image of page 8
Important Planes in a Cubic Crystal ) 200 ( ) 100 ( ) 00 1 ( ) 110 ( ) 111 ( How do these relate to (010), (200), (0Ī0) etc. ? Equivalent planes: (100) plane parallel to y, z planes
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 10
Last Lecture: General overview and motivation periodic table atomic arrangement, bonding epitaxy
Image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern