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Today's Topics:
1. Friday 02.02.2024 (Serge Krashakov)
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Message: 1
Date: Wed, 31 Jan 2024 21:13:44 +0300
From: Serge Krashakov <sakr@itp.ac.ru>
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Friday 02.02.2024
Message-ID: <91546d40-7b17-4351-8f22-0c2aed7845fc@itp.ac.ru>
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Уважаемые коллеги!
На заседании Ученого совета ИТФ в пятницу 2 февраля в 11:30 будет
заслушан доклад:
I.V. Poboiko and _M.V. Feigel'man_
*Mean-field theory of first-order quantum superconductor-insulator
transition*
Recent experimental studies of strongly disordered Indium Oxide films
revealed an unusual first-order quantum phase transition between
superconducting and insulating state (SIT), with the jump between
nonzero and zero values of superfluid stiffness at the transition. This
finding is in sharp contradiction with a "scaling scenario" discussed
usually in relation to SIT. In the present paper we propose a simple
theory of this first-order transition. It is based upon idea of
competition between two intrinsically different ground states that can
be formed by initially localized (due to strong disorder) electron
pairs: superconducting state and Coulomb glass insulator. These two
ground states are characterized by two crucially different order
parameters, thus it is natural to expect a discontinuous transition
between them at T = 0. The transition happens when magnitudes of
superconducting gap ∆ and Coulomb gap E_C are comparable.
ID и пароль онлайн-трансляций в Zoom те же, что и для предыдущих
трансляций семинаров и докладов на Ученом совете:
https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09
Meeting ID: 968 9936 4518
Пароль: 250319
При числе желающих не менее 5 будет организован автобус.
Для записи на автобус из Москвы в Черноголовку необходимо до 18:00
четверга отправить письмо на адрес электронной почты bus@itp.ac.ru
После этого записавшимся до 20:00 поступит подтверждение об отправке или
неотправке автобуса в зависимости от числа записавшихся.
Запись на обратный автобус - на Ученом совете.
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