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X-ORIGINAL-URL:https://www.chimieparistech.psl.eu
X-WR-CALDESC:Évènements pour Chimie ParisTech - PSL
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DTSTART;TZID=Europe/Paris:20240703T080000
DTEND;TZID=Europe/Paris:20240919T170000
DTSTAMP:20240924T143116Z
CREATED:20240303T162604Z
LAST-MODIFIED:20240924T143116Z
UID:25598-1719993600-1726765200@www.chimieparistech.psl.eu
SUMMARY:ParisTech International Admission Program 2024
DESCRIPTION:Le réseau ParisTech a lancé le 1er juin 2024 sa nouvelle campagne d’admission d’étudiants internationaux en vue de la rentrée 2025.\nLe programme est ouvert aux étudiants en science et ingénierie de niveau bachelor du monde entier. \nCandidatures ouvertes jusqu’au 19 septembre 2024. \nToutes les informations sont disponibles ici.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/paristech-international-admission-program-2024/
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DTSTART;TZID=Europe/Paris:20240901T080000
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DTSTAMP:20240826T113940Z
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LAST-MODIFIED:20240826T113940Z
UID:25806-1725177600-1725555600@www.chimieparistech.psl.eu
SUMMARY:EUROCORR 2024
DESCRIPTION:Le congrès EUROCORR 2024 se tiendra à Paris au Palais des congrès du 1er au 5 septembre 2024\, réunira plus de 1000 participants\, représentant 50 pays\, et traitera de la dégradation des matériaux en interaction avec l’environnement et des moyens d’accroitre la durabilité de ces matériaux. \nLa durabilité des matériaux est un enjeu majeur pour le succès de la transition énergétique\, de l’évolution vers une énergie décarbonée (incluant notamment l’hydrogène)\, et donc de la réduction des émissions de CO2\, condition nécessaire au ralentissement du réchauffement climatique. \nCe congrès est organisé par le CEFRACOR (The French Corrosion Society)\, dont le Président est le Pr. Philippe Marcus\, en partenariat avec Chimie ParisTech-PSL\, le CNRS et la DECHEMA (Allemagne)\, sous l’égide de la Fédération Européenne de la Corrosion. \nPlus d’information ici \nContact : eurocorr2024@cefracor.org
URL:https://www.chimieparistech.psl.eu/evenement-agenda/eurocorr-2024/
LOCATION:Palais des Congrès\, 2 Place de la Porte Maillot\, Paris\, 75017\, France
CATEGORIES:Colloque
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DTSTART;TZID=Europe/Paris:20240903T140000
DTEND;TZID=Europe/Paris:20240903T163000
DTSTAMP:20240829T111413Z
CREATED:20240829T111413Z
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UID:25814-1725372000-1725381000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Tuesday September 3\, 2:00 pm (Paris time)\nElectrical Breakdown of Excitonic Insulators\nBy Xi Dai\, Department of Physics\, The Hongkong University of Science and Technology\, Hong Kong\, China.\nAt LPEM next week at ESPCI\, Room Charpak\, entrance building\, ground floor. \n\n\n\n\n\nhttps://espci.zoom.us/j/83444829053?pwd=T4qjtaBBe6AYAbvHC4rRwMcPWVaMBD.1\nID: 834 4482 9053Passcode: DJThouless\n\nElectrical Breakdown of Excitonic Insulators\, Yuelin Shao1 and Xi Dai2\n1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics\, Chinese Academy of Sciences\, Beijing 100190\, China\n2 Department of Physics\, The Hongkong University of Science and Technology\, Clear Water Bay\, Kowloon 999077\, Hong Kong\, China. \n\nIn this paper\, we propose a new electrical breakdown mechanism for exciton insulators in the BCS limit\, which differs fundamentally from the Zener breakdown mechanism observed in traditional band insulators. Our new mechanism results from the instability of the many-body ground state for exciton condensation\, caused by the strong competition between the polarization and condensation energies in the presence of an electric field. We refer to this mechanism as “many-body breakdown”. To investigate this new mechanism\, we propose a BCS-type trial wave function under finite electric fields and use it to study the many-body breakdown numerically. Our results reveal two different types of electric breakdown behavior. If the system size is larger than a critical value\, the Zener tunneling process is first turned on when an electrical field is applied\, but the excitonic gap remains until the field strength reaches the critical value of the many-body breakdown\, after which the excitonic gap disappears and the system becomes a highly conductive metallic state. However\, if the system size is much smaller than the critical value\, the intermediate tunneling phase disappears since the many-body breakdown happens before the onset of Zener tunneling. The sudden disappearance of the local gap leads to an “off-on” feature in the current-voltage (I − V ) curve\, providing a straightforward way to distinguish excitonic insulators from normal insulators.\n\n\n\n\n\n\n\n 
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-132/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
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