Seek help for space groups in 2 dimensions Bravais lattice

harmonyU
Messages
4
Reaction score
0
Dear experts,
I'm not familiar with crystal structure theory. I'm seek expertise to figure out space groups in 2 dimensions Bravais lattice of the attached structures. In the figure, red and greens dots represent different atoms. I'll greatly appreciate your help.

Struture 1
https://www.physicsforums.com/attachment.php?attachmentid=55823&stc=1&d=1361080231
structure 2
https://www.physicsforums.com/attachment.php?attachmentid=55824&stc=1&d=1361080249
structure 2
https://www.physicsforums.com/attachment.php?attachmentid=55825&stc=1&d=1361080249
 

Attachments

  • Structure 1.jpg
    Structure 1.jpg
    24.2 KB · Views: 800
  • Structure 2.jpg
    Structure 2.jpg
    19.8 KB · Views: 774
  • Structure 3.png
    Structure 3.png
    2.4 KB · Views: 816
Physics news on Phys.org
Dr Transport said:
do you see any symmetry planes?
Thank you men. I'm not familiar with space group in 2D bravais lattice. Can you give me your expertise answer?
 

Thread 'Stability of persistent currents in superconductors regardless of temperature'

From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. Annihilated superfluid carriers become normal and lose their momenta on lattice atoms. So if we induce a persistent supercurrent in a ring below Tc and after that slowly increase the temperature, we must observe a decrease in the actual supercurrent, because the density of electron pairs and total supercurrent momentum decrease. However, this supercurrent...
View full post »

Thread 'Instantaneous dipole moment and orbitals'

Hi. I have got question as in title. How can idea of instantaneous dipole moment for atoms like, for example hydrogen be consistent with idea of orbitals? At my level of knowledge London dispersion forces are derived taking into account Bohr model of atom. But we know today that this model is not correct. If it would be correct I understand that at each time electron is at some point at radius at some angle and there is dipole moment at this time from nucleus to electron at orbit. But how...
View full post »

Similar threads

Bravais lattices in 2 dimensions (and 3 dimensions)
Replies
3
Views
5K
I The missing factor of 2π in reciprocal lattice calculations
Replies
4
Views
3K
Solving OP AMP Structure Problems: Inverting & Non-Inverting Inputs
Replies
5
Views
1K
Equation of motion for a Mass-Spring-Damper-system, one mass 2 DOFS
Replies
6
Views
8K
Proof: Parabola reflects light to the focus
Replies
15
Views
6K
Is x(t) equal to the shifted step function u(t+2)-u(t)?
Replies
1
Views
1K
Making a Lissajous Figure: 2 Questions
Replies
2
Views
2K
Why Is Task 2 in Quantum Mechanics Homework Difficult?
Replies
3
Views
2K
Engineering Thevenin equivalent circuit parameters
Replies
3
Views
2K
Finding a formula for this curve
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top