visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-10-16 16:00 
일시 Oct. 16 (Fri.), 04:00 PM 
장소 https://kaist.zoom.us/j/89198078609 
연사 Dr. Daesu Lee 

Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern

 Dr. Daesu Lee

Department of Physics, POSTECH

 Oct. 16 (Fri.), 04:00 PM Online seminar

https://kaist.zoom.us/j/89198078609

회의 ID: 891 9807 8609

암호: 660431

 

 

Abstract:

Nonequilibrium atomic structures can host exotic and technologically relevant properties in otherwise conventional materials. Oxygen octahedral rotation forms a fundamental atomic distortion in perovskite oxides, but only a few patterns are predominantly present at equilibrium. This has restricted the range of possible properties and functions of perovskite oxides, necessitating the utilization of nonequilibrium patterns of octahedral rotation. Here, we report that a designed metastable pattern of octahedral rotation leads to robust room-temperature ferroelectricity in CaTiO3, which is otherwise nonpolar down to 0 K. Guided by density-functional theory, we selectively stabilize the metastable pattern, distinct from the equilibrium pattern and cooperative with ferroelectricity, in heteroepitaxial films of CaTiO3. Atomic-scale imaging combined with deep neural network analysis confirms a close correlation between the metastable pattern and ferroelectricity. This work reveals a hidden but functional pattern of oxygen octahedral rotation and opens avenues for designing multifunctional materials.

 

번호 날짜 장소 제목
516 2021-06-22 17:00  Zoom webinar  Spintronics meets Quantum Materials file
515 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
514 2020-09-24 09:00  Zoom Video  (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
513 2022-01-12 11:00  Zoom and E6 #1323  Spectroscopic study of trapped ions towards probing dark matter and new physics file
512 2023-05-17 16:30  Zoom  Detecting Hidden Photon Dark Matter via the Excitation of Qubits file
511 2023-11-29 10:00  Zoom  [High Energy Theory Seminar] Averaged null energy and the renormalization group
510 2023-04-13 11:00  Zoom  [High Energy Theory Seminar]Noninvertible Gauss Law and Axions
509 2022-11-04 16:30  Zoom  초세대 협업연구실 Quantum- & Nano-Photonics_Multifunctional neural probes with integrated nanophotonics file
508 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
507 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
506 2020-09-11 14:00  zoom  SRC Seminar file
505 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
504 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
503 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
502 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
501 2017-04-27 16:00  Seminar Room(#1323, E6-2)  반도체 양자점을 이용한 단광자 광원
500 2017-03-06 16:00  Seminar Room 1501  Spring 2017: Physics Colloquium file
499 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
498 2017-03-21 16:00  Seminar Room 1323  Spring 2017: Physics Seminar Serises file
497 2018-07-02 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  High Precision Magnetic Field Measurement for the Muon g-2 Experiment file