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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-592@lptms.universite-paris-saclay.fr
DTSTART:20180529T110000Z
DTEND:20180529T120000Z
DTSTAMP:20180509T123828Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-shamashis-sengupta/
SUMMARY:Séminaire du LPTMS : Shamashis Sengupta - LPTMS\, salle 201\, 2èm
 e étage\, Bât 100\, Campus d'Orsay - 29 Mai 18 11:00
DESCRIPTION:Gate-tunable superconductivity in oxide heterostructures\nShama
 shis Sengupta (CSNSM\, Université Paris-Sud)\n&nbsp\;\n\nThe realization 
 of two-dimensional electronic gases (2DEGs) in oxide-based heterostructure
 s (e.g. LaAlO3/SrTiO3) has led to important discoveries about superconduct
 ivity in low dimensions. There have been reports of the observation of pai
 ring interactions without superconductivity (Cheng et al.\, Nature 521\, 1
 96 (2015)) and density-of-states features resembling the pseudogap in cupr
 ates (Richter et al.\, Nature 502\, 528 (2013)). Consequently\, this 2DEG 
 has emerged as a model system to study the physics of Cooper pair formatio
 n in two dimensions and to gain useful insights about complex problems\, e
 .g.\, the phase diagram of high temperature superconductors. In this talk\
 , we will discuss about a new method developed in our group for realizing 
 such superconducting systems in oxide heterostructures\, and the results o
 f experiments to characterize their properties. Due to the low carrier den
 sity\, it is possible to change it using a gate voltage following the prin
 ciple of a field-effect transistor. The superconducting critical parameter
 s (temperature and field) are tunable as a function of the gate voltage\, 
 leading to a 'superconducting dome' in the phase diagram. The possibility 
 of continuously varying the carrier density allows us to study different e
 quilibrium and non-equilibrium features characterizing the electronic phas
 es. Results of some recent experiments will be presented.
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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