Past QuMat seminars in Utrecht

The QuMat seminars in Utrecht is a bi-weekly joint venture between Utrecht’s experimental and theoretical condensed matter physics groups.
Coming QuMat seminars are listed here.

Videos from previous talks are available on youtube and listed here.


ARPES enables the precise experimental determination of the electronic self-energy as we present here from the strange metal single-layer cuprate (Pb,Bi)_2Sr_(2−x)La_xCuO_(6+δ) overa wide range in w- and T for k along the nodal direction. Constant energy cuts through the spectral function (MDCs) show a non-Lorentzian lineshape as k increases away from kF: the nodal self-energy is k dependent. These experimental data provide a new test for aspiring theories.

The self energy extracted from experiment is captured remarkably well by a power law that smoothly evolves with hole doping with – crucially – a k-dependent scaling exponent. In fact, this description emerges naturally from AdS/CFT-based semi-holography, putting a spotlight on holographic methods for the quantitative modelling of strongly interacting quantum materials like the cuprate strange metals [1].

[1] S. Smit et al.,

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