UTe2: Excitement along the road of heavy fermion superconductivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10419428" target="_blank" >RIV/00216208:11320/20:10419428 - isvavai.cz</a>

Result on the web

<a href="http://kfkl.cz/cs/component/seminar/?task=3&cid=464" target="_blank" >http://kfkl.cz/cs/component/seminar/?task=3&cid=464</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

UTe2: Excitement along the road of heavy fermion superconductivity

Original language description

Unconventional superconductivity was first discovered in heavy fermion systems 40 years ago. Today this field for research is constantly yielding new information and surprises. One particularly fruitful branch is the family of uranium based ferromagnetic superconductors, which have brought the decisive proof of the role of magnetic fluctuations in the superconducting pairing mechanism, as well as harboring such rare phenomena as a probable triplet &quot;p-wave&quot; superconducting order parameter and an enhancement of superconductivity by an external magnetic field. This latter spectacular effect was qualitatively understood by the destabilization of ferromagnetic order when a field is applied transverse to the direction of the ordered moments in these Ising type systems, leading to a new channel of magnetic fluctuations boosting superconductivity. This picture was however recently challenged by the discovery of superconductivity with a similar enhancement under magnetic field in the paramagnetic heavy fermion system UTe2. Over the past year UTe2 has been the subject of intense research by teams in the US, Japan and France. I will present some of the recent results including reinforced or re-entrant superconductivity under applied field, metamagnetism, as well as the surprising behavior under pressure where the superconducting critical temperature is enhanced by a factor 2, reaching 3K, and the rare phenomenon of multiple superconducting phases is found.

Czech name

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Czech description

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Type

W - Workshop organization

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Event location

online

Event country

CZ - CZECH REPUBLIC

Event starting date

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Event ending date

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Total number of attendees

54

Foreign attendee count

36

Type of event by attendee nationality

WRD - Celosvětová akce