[RpL 810] Fwd: Maxim Yu. Kagan: The Kohn-Luttinger effect and anomalous pairing in novel superconductive and superfluid systems (14.04.2015)

Чт Апр 2 15:16:14 MSK 2015

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Subject: 	Maxim Yu. Kagan: The Kohn-Luttinger effect and anomalous 
pairing in novel superconductive and superfluid systems (14.04.2015)
Date: 	Thu, 2 Apr 2015 11:55:38 +0000
From: 	Russian Quantum Center information <info на rqc.ru>
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To: 	<akorneev на rplab.ru>

Maxim Yu. Kagan: The Kohn-Luttinger effect and anomalous pairing in 
novel superconductive and superfluid systems (14.04.2015)

*Maxim Yu. Kagan: The Kohn-Luttinger effect and anomalous pairing in 
novel superconductive and superfluid systems*

On 14th of April at 5 p.ma RAS Corresponding Fellow, Principal 
Investigator in the Kapitza Institute for Physical Problems, Moscow, 
Professor of the Moscow Institute of Electronics and Mathematics - Maxim 
Yu. Kagan 
<http://rqc.us4.list-manage1.com/track/click?u=8108e48f6c1a81eeb480bf510&id=275273f0e6&e=59b6fc1841>, 
will hold a seminar in the Russian Quantum Center:

«We discuss the Kohn-Luttinger mechanism of superconductivity and 
superfluidity in 3D and 2D fermionic systems with purely repulsive 
interaction. We construct the phase diagrams and find the regions of 
superconductive p-wave, d-wave and f-wave pairings in free space and on 
different (cubic, square , hexagonal) lattices in Hubbard, t-J and other 
basic models of strongly correlated electron systems. We demonstrate the 
possibility to increase T-c significantly already at low density of 
fermions in the spin-polarized case and in the two-band situation. The 
proposed theory can explain or predict superconductivity in different 
materials including high-T-c superconductors, heterostructures and 
semimetals, superlattices and dichalcogenides, heavy fermions and 
organic superconductors. It is also useful for novel systems explaining 
angular dependence of the superconductive gap in recent angle-resolved 
photoemission (ARPES) experiments in FeAs-based superconductors and 
predicting anomalous superconductivity in SrTiO3 and in idealized 
monolayer and bilayer graphene. For low-temperature physics the theory 
predicts triplet p-wave superfluidity in 3D and 2D mixtures of He-3 in 
He-4 and in ultracold Fermi-gases in magnetic traps, as well as a strong 
T-c increase in spin-polarised A1-phase of the superfluid He-3. Note 
that the potential for the experimental realization of high-temperature 
superfluidity in quasi two-dimensional spin-imbalanced (polarised) 
Fermi-gases has the group of J.E.Thomas in North Carolina. Note also 
that the physics of graphene has important analogies with solid He-3 
submonolayers on grafoil substrate and with the 2D optical lattices. 
Recently the tunable honeycomb optical lattices for the Fermi-gas of 
ultracold K-40 atoms with adjustable properties and moving and merging 
Dirac points were realized experimentally in Zurich by T.Esslinger team.»

Maxim Yu. Kagan is a RAS Corresponding Fellow, Principal Investigator in 
the Kapitza Institute for Physical Problems, Moscow, Professor of the 
Moscow Institute of Electronics and Mathematics. His research interests 
include superconductivity, superfluidity and BCS-BEC crossover. He has 
authored books "Modern trends in Superconductivity and Superfluidity” 
(Springer, 2013) and Physics of macroscopic quantum systems" (MPEI 
Publishing, 2014, in Russian).

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