Recent content by jonesj314

Bump. Would this be better moved to a different board?

Homework Statement A 100eV electron beam is normally incident on an unreconstructed Si(001) surface. Calculate the angle from the surface normal to the (1, 0) and (1, 1) LEED spots (the spots are indexed using the surface unit cell) Si cubic latice parameter is 5.43072 angstroms...

oh of course :) thank you! All makes sense now

Hi, thanks for the reply. You're right, I evaluated the numerator incorrectly. I still don't understand the significance of the denominator. Why do I get zero? Would permuting the triple product to the form you suggest give a different answer? Quite confused as to what this should be.

Homework Statement Si(001) has the following lattice vectors in a (2x1) reconstruction \vec{a'_1} = \vec{a_1} + \vec{a_2} \vec{a'_2} = -0.5 \vec{a_1} + 0.5 \vec{a_2} Calculate the reciprocal lattice vectors of the reconstructed unit cell, \vec{b'_1} and \vec{b'_2} in terms of...