Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with superconductivity
Search options not deleted
user 105482
Superconductivity is the transmission of current with no resistive losses, and is one of the most active areas of condensed matter physics research.
1
vote
1
answer
283
views
Eigenvectors of the BCS Hamiltonian
In introductory superconductivity one often studies the BCS Hamiltonian
$$H=
\begin{pmatrix}
\xi & -\Delta \\
-\Delta & -\xi
\end{pmatrix}
$$
I can find the Eigenvalues and Eigenvectors by writing …
- 465
4
votes
0
answers
82
views
Is there a violation in the Onsager-Kelvin relation in Normal metal - superconductor junctions?
I'm currently reading the paper https://journals.aps.org/prb/pdf/10.1103/PhysRevB.48.15198
It is about charge $I$ and heat $I_H$ currents in NS junctions due to temperature $(\Delta T)$ and voltage $ …
- 465
0
votes
0
answers
309
views
Deriving Continuum BdG equation from Tight-Binding model for Graphene-Superconductor interface
Background
My question concerns Beenakker's paper on "Specular Andreev Reflection in Graphene": cond-mat/0604594 (arxiv)/Phys.Rev.Lett. 97, 067007 (The same topic is also discussed in Rev. Mod. Phys. …
- 465
0
votes
Accepted
Why is Andreev reflection in a NS junction retroreflective?
Solution
The solution is actually quite simple. Let us for simplicity consider two dimensions $(x,y)$. The electron and hole dispersions are
\begin{equation}
\mathbf{k}^2 = \frac{2m}{\hbar}\left(\mu + …
- 465
1
vote
1
answer
248
views
Why is Andreev reflection in a NS junction retroreflective?
Background
Consider a normal metal (N) - superconductor (S) junction. Assume N is in the region $x<0$ and S is in the region $x>0$. In addition, let us assume that the system is invariant in the $y$ a …
- 465
0
votes
1
answer
690
views
Electron and holes in tight binding Hamiltonian on two sublattices
Background
Say that I have a tight binding Hamiltonian (with spinless fermions) of the form
$$H = - 2t \sum_{ij} (c_i^{\dagger} c_j + h.c) - 2\mu \sum_i c^{\dagger}_i c_i$$
where we only sum over nea …
- 465