Questions tagged [superconductivity]

For questions related to superconductivity in materials.

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6
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1answer
66 views

Signatures of Competing Orders in Ab Initio Calculations

Some materials have various competing and/or synergistic orders, such as charge density waves and superconducting pairing. Are there signatures of such an interplay between orders that can be seen in ...
5
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0answers
47 views

Ab initio calculations beyond s-wave BCS superconductors

Conventional superconductors are often modelled using Bardeen-Cooper-Schrieffer (BCS) theory with an s-wave order parameter, but not all superconductors describable with BCS theory have an s-wave ...
4
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0answers
13 views

How are nematic phases modelled?

Nematic phases in superconducting materials are studied in both angular-resolved photoelectron spectroscopy (ARPES) and second harmonic generation (SHG) experiments. What techniques, if any, are used ...
3
votes
0answers
12 views

How are pseudogap phases typically modelled?

Cuprate superconductors have a pseudogap phase that is not well-understood. What attempts have been made to understand the pseudogap phase from an ab-initio perspective?
9
votes
2answers
161 views

Methods for studying superconductivity?

From Wikipedia, superconductivity is the set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material. Any ...
20
votes
1answer
123 views

What class of materials are closest to realizing the tunable coupling Hamiltonian?

From a physics point of view, there is an effective (approximation to second-order coupling Jaynes-Cummings) Hamiltonian of the form [1] \begin{equation} H=\sum_j\omega_j(t)\sigma_j^z+\sum_{\langle i,...
17
votes
2answers
104 views

Can ab initio crystal structure methods predict the structure of cuprates from their stoichiometry and quantify the brittleness of those materials?

Current ab initio methods may not be able to predict the electronic transport properties of cuprate superconductors but can they be used to predict their crystal structure? Furthermore those materials ...
11
votes
1answer
51 views

What limits the accuracy of ab initio methods in predicting the transition temperature of conventional superconductors?

Here I assume that conventional superconductors refer to materials that undergo a superconducting transition at low temperature as described by the Bardeen-Cooper-Schrieffer theory (BCS). For those ...
19
votes
1answer
104 views

Are there any High-Throughput studies that aim to discover High Tc superconductors?

High-Throughput materials modeling based on Density Functional Theory has become very popular recently. If, for example, we search "High-Throughput Perovskites" in Google Scholar, we get over ~14,000 ...