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CATEGORIES:Seminar
DESCRIPTION:Join us remotely for a joint Special Colloquium between the Col
lege of Science\, College of Engineering & Quantum Materials and Sensing In
stitute on Friday\, February 23rd\, 2024. \n\n \n\nSpeaker: Dr. Md Shafayat
Hossain (Princeton University)\n\n \n\nHosts: Arun Bansil and Matteo Rinal
di\n\n \n\nWhen: Friday\, February 23rd\, 2024 @ 11AM\n\n \n\nTitle: Room-t
emperature and many-body quantum states in topological materials\n\n \n\nAb
stract: Topological states of matter combine quantum physics with topologyâ€”
a branch of mathematics that explores geometric properties preserved under
deformation. Quantum topology can lead to incredible properties. For instan
ce\, in a topological insulator\, conducting edge states exist within an in
sulating bulk. Despite continuing progress\, the search for such new quantu
m phases remains a central theme of condensed matter physics. In this talk\
, I will introduce two of the most sought-after quantum statesâ€”room-tempera
ture topology and topological exciton insulator. I will first discuss our s
pectroscopic observation of topological edge states in Bi4Br4. I will show
that the topological states\, which typically can only be observed at tempe
ratures around absolute zero\, survive here at room temperature. I will als
o show how we probe the quantum transport response of this edge state using
quantum interference. These observations mark the first steps in demonstra
ting the potential of topological materials for energy-saving applications.
In the second part of my talk\, I will discuss our discovery of a unique t
opological state in Ta2Pd3Te5. Here\, the Coulomb interactions pair fermion
s (electrons and holes) into bosons (excitons)\, leading to a superfluid co
ndensate state in the bulk while hosting topological edge states on the bou
ndary. Finally\, I will touch upon how these discoveries suggest exciting p
ossibilities. This includes new devices and experimental techniques to disc
over the fundamental physics of topological quantum matter\, opening doors
for more efficient room-temperature devices and quantum information technol
ogy.\n\n \n\nZoom meeting link: https://northeastern.zoom.us/j/99842535071
DTEND:20240224T050000Z
DTSTAMP:20240530T194846Z
DTSTART:20240223T160000Z
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SUMMARY:Joint Special Colloquium- College of Science\, College of Engineeri
ng & QMSI: 'Room-temperature and many-body quantum states in topological ma
terials"
UID:tag:localist.com\,2008:EventInstance_45649225153345
URL:https://calendar.northeastern.edu/event/joint_special_colloquium-_colle
ge_of_science_college_of_engineering_qmsi_room-temperature_and_many-body_qu
antum_states_in_topological_materials
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