Condensed concepts

In February 1986, Bednorz and Müller made a stunning discovery: superconductivity at a temperature of 35 K in a doped copper oxide (cuprate)...

About twenty-five years ago I became interested in how the Fermi surface of the metallic state of organic charge-transfer salts could be map...

Two key ideas concerning unconventional superconductors are the following. 1. s-wave and p-wave pairing (in momentum space) are associated...

I welcome comments on this preprint. Quantum critical local spin dynamics near the Mott metal-insulator transition in infinite dimensions ...

Like everything in India, higher education is incredibly diverse, both in quality, resources, and culture. These statistics give some of the...

There is a very helpful review article Demystifying the Holographic Mystique by Dmitri Khveshchenko In order to motivate a proper full r...

Today I am giving a  seminar  at the  Institute of Physics in Belgrade . My host is  Darko Tanaskovic  who has done  nice work using DMFT t...

And why is it so elusive? Quantum many-body systems are characterised by many different energy scales (e.g. Fermi energy, Debye frequency,...

There is an interesting paper Quantum critical dynamics of a magnetic impurity in a semiconducting host Nagamalleswararao Dasari, Swagata ...

The frequency dependence of the real part of the conductivity of a metal gives a lot of information, both qualitative and quantitatively. Fo...

Nandan Pakhira and I just finished a paper Shear viscosity of strongly interacting fermionic quantum fluids Eighty years ago Eyring propo...

There is an interesting paper Quantum criticality of Mott transition in organic materials  Tetsuya Furukawa, Kazuya Miyagawa, Hiromi Tanig...

Nandan Pakhira and I recent completed a paper Absence of a quantum limit to charge diffusion in bad metals This work was partly motivated...

Previously I posted about some interesting theory and cold atom experiments that suggest that the spin diffusion constant D has a lower boun...

I am increasingly concerned about how many papers, particularly in luxury journals , publish claims and conclusions that appear (at least to...

Generally I am skeptical about quantum criticality as an important organising principle for strongly correlated electron materials (see for ...

On thursday I am giving a seminar at the Institute of Physics in Belgrade, Serbia. My host is Darko Tanasković . He recently did some nice ...

Here is a random collection of a few of the things I learnt last week in Korea. Yuji Matsuda described experimental work on the iron pnict...

An outstanding question in frustrated quantum magnets in two dimensions is whether one can have excitations with fractional quantum numbers,...

It may depend on who you ask. It is interesting that even twenty years ago the phrase "quantum matter" was rarely used. Now we h...