Seminars Digest, Vol 58, Issue 8

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Today's Topics:

1. 24.11.2023 отмена автобуса (К. Дубейко)
2. Коллоквиум сегодня в 16:00 (Serge Krashakov)

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Message: 1
Date: Thu, 23 Nov 2023 17:41:02 +0300
From: К. Дубейко <bus@itp.ac.ru>
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] 24.11.2023 отмена
автобуса
Message-ID: <83d75cfb-8e97-4dc1-a669-bb14dd7b98df@itp.ac.ru>
Content-Type: text/plain; charset=UTF-8; format=flowed

Уважаемый сотрудники и студенты!

24.11.2023 автобус не запланирован.

К.

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Message: 2
Date: Fri, 24 Nov 2023 11:03:41 +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] Коллоквиум сегодня в
16:00
Message-ID: <fec6f63b-343a-436c-981d-928b4d039364@itp.ac.ru>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Уважаемые коллеги,

Напоминаю, что сегодня также состоится коллоквиум, который из-за разницы
во времени между США и Москвой начнется *в 16:00*, на котором будет
заслушан доклад :

Tigran Sedrakyan (University of Massachusetts, Amherst)
*Moat-band physics and emergent excitonic topological order in
correlated electron-hole bilayers*

The role of the particle-particle interaction becomes increasingly
important if the spectral band structure of a free system has increasing
degeneracy. Ultimately, it will be the role of interactions to choose
the state of the system. Examples include the systems with the lowest
band having a degenerate minimum along a closed contour in the
reciprocal space -- the Moat. A weak perturbation can set a new energy
scale describing the state with qualitatively different properties in
such a limit of infinite degeneracy. In this talk, I will discuss the
general principles behind the universal properties of correlated bosons
on moat bands, which host topological order with long-range quantum
entanglement. In particular, I will discuss moat-band phenomena in
shallowly inverted InAs/GaSb quantum wells, where we observe an
unconventional time-reversal-symmetry breaking excitonic ground state
under imbalanced electron and hole densities. I will show that the
strong frustration of the system leads to a moat band for excitons,
resulting in a time-reversal-symmetry breaking excitonic topological
order, which explains all our experimental observations.

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
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