Questions tagged [superconductivity]

For questions related to superconductivity in materials.

Filter by
Sorted by
Tagged with
10
votes
1answer
228 views

"Quantum protectorates" and the limits of grand unified theories

I've recently made myself more familiar with Laughlin and Pines' "quantum protectorate" arguments (1, 2), which seems built on Anderson's famous More is Different article (3). This does seem ...
10
votes
1answer
173 views

Nematicity in superconductors

It seems to me that the definition of "nematic phase" is quite chamaleonic. Quoting from its first definition [Nature 393, 550 (1998)] for a 2-dimensional square lattice "The nematic ...
7
votes
1answer
72 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 ...
10
votes
0answers
93 views

First principles 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 ...
6
votes
0answers
39 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
26 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?
10
votes
2answers
192 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
145 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
115 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
59 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
113 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 ...