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Уважаемые коллеги!<br>
<br>
На заседании Ученого совета в пятницу 23 сентября в 11:30 будет
заслушан доклад:<br>
<br>
<u>P.A. Nosov</u>, I.S. Burmistrov, S. Raghu<br>
<font size="4"><b>Superconductivity and localization near a
two-dimensional ferromagnetic quantum critical point</b></font><br>
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We consider a two-dimensional disordered Fermi liquid weakly coupled
to the soft fluctuations associated with proximity to an
Ising-ferromagnetic quantum critical point. By performing a two-loop
calculation of the effective action in the modified non-linear sigma
model framework, we derive interaction-induced corrections to the
Usadel equation governing the superconducting gap function. We
analyze a linearized version of this equation and show that
diffusion and localization effects drastically change the interplay
between fermionic incoherence and strong pairing interactions. In
particular, we demonstrate that: (i) diffusive particle-particle
modes (so-called `Cooperons') acquire new dynamical scaling z=4;
(ii) there is an intermediate range of disorder strength where
superconductivity is enhanced, eventually followed by a tendency
towards the superconductor-insulator transition at stronger
disorder; (iii) dephasing of particle-particle excitations leads to
an additional contribution to the thermal self-energy and increases
pair-breaking effects<br>
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ID и пароль онлайн-трансляции в Zoom те же, что и для предыдущих
трансляций докладов на Ученом совете:<br>
<div class="moz-cite-prefix"> <a class="moz-txt-link-freetext"
href="https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09">https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09</a><br>
Meeting ID: 968 9936 4518<br>
Пароль: 250319</div>
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