Questions tagged [superconductivity]
For questions related to superconductivity in materials.
11
questions
10
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1answer
217 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
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1answer
163 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
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1answer
71 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 ...
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0answers
64 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 ...
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33 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 ...
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0answers
20 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?
10
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2answers
173 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
139 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
111 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
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1answer
54 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
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1answer
107 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 ...
