12/24 【Special lecture】Unraveling Nanoscale Stimulus Dynamics in Complex Material Systems: Insights from Scanning Probe and Phase-Field Modeling

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時間：12月24日(二) 12：00 ~ 13：20

題目：Unraveling Nanoscale Stimulus Dynamics in Complex Material Systems: Insights from Scanning Probe and Phase-Field Modeling

講者：劉懿德 博士後研究員 Dr. Yi-De Liou, Postdoc

服務單位： Department of Physics, National Cheng Kung University

地點：本校科學三館1樓 SC102會議室

摘要：

Understanding how external stimuli, such as electric field, mechanical strain, and light, induce dynamic changes in the physical properties of complex material systems is a central challenge in condensed matter physics. Systems like complex oxides, heterostructures, and 2D materials exhibit emergent phenomena—such as ferroelectricity, magnetism, and ultrafast photovoltaic effects—that arise from intricate couplings among electronic, structural, and magnetic degrees of freedom. These phenomena provide a rich platform for exploring fundamental physics and offer pathways to novel device applications. However, the underlying mechanisms driving these nanoscale stimulus dynamics and their connection to mesoscale behaviors remain elusive.
This presentation investigates an integrated approach that combines scanning probe microscopy (SPM) and phase-field modeling to uncover the physics governing these dynamic processes. SPM techniques deliver nanoscale resolution, enabling detailed characterization of domain evolution, spatial variations in conductivity, elastic moduli, and carrier dynamics under external stimuli. Complementary phase-field modeling captures the underlying physical principles linking nanoscale interactions to mesoscale phenomena, including domain wall dynamics, polarization switching, and strain-mediated coupling effects. Together, these methods enable the prediction and design of emergent properties, such as non-volatile domain switching and ultrafast photovoltaic responses, in ferroic and phase diverse systems.
Integrating experimental and theoretical methodologies advances our understanding of the mechanisms governing complex material systems under external stimuli. These findings not only deepen our knowledge of condensed matter physics but also open new opportunities to harness emergent phenomena for high-speed, high-density, and energy-efficient devices. Building on these insights, the presentation will outline future directions to expand these interdisciplinary approaches, with a particular focus on uncovering novel physics in strongly correlated and low-dimensional systems.

12/18 【Special lecture】Unraveling AGN Jets and Black Hole Accretion Across Multiple Scales

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時間：12月18日(三) 12：00 ~ 13：20

題目：Unraveling AGN Jets and Black Hole Accretion Across Multiple Scales

講者：蘇恭毅 博士後研究員 Dr. Kung-Yi Su, BHI Fellow

服務單位： Black Hole Initiative, Harvard University

地點：本校科學三館3樓 SC353-2會議室

摘要：

AGN feedback poses a multiscale challenge, intertwined with significant disparities across the diverse length and time scales inherent in galaxy physics and the dynamics of black hole accretion disks. In this presentation, we explore our comprehensive investigation of AGN jets and black hole accretion, spanning from the galaxy scale to the black hole event horizon, with the ultimate goal of unifying the underlying physics across these scales.
At the galactic scale, we conduct an in-depth study of the physical variations of AGN jets using isolated galaxy simulations, ranging from L* galaxies to massive cluster ellipticals. We identify the conditions under which jet models effectively quench massive galaxies and their corresponding observational signatures. Notably, we reveal the critical role of cosmic rays in jets and highlight significant variations arising from different cosmic ray launching models.
At the intermediate scale, we employ a suite of idealized simulations centered on the black hole vicinity. By resolving the gravitational capture of gas by the black hole, we examine the detailed interplay between AGN jets and black hole accretion, deriving an analytical model to describe jet propagation and the self-regulation of black hole growth as functions of black hole mass, feedback models, and gas properties. This model points to a low feedback efficiency upper limit required for the formation of supermassive black holes at high redshift, as uncovered by JWST observations.

Finally, we outline our ongoing efforts to integrate the galaxy scale and black hole horizon scale into a unified simulation framework that leverages a novel multi-zone method to track bidirectional gas flows.

【徵才】 國立臺灣師範大學僑生先修部 徵聘113學年度物理兼課及儲備教師

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國立臺灣師範大學僑生先修部 徵聘113學年度物理兼課及儲備教師

  • 一、徵選類別：

徵選職級：兼課及儲備教師（講師(含)以上）

徵選科目與名額：物理科1-2名

  • 二、應徵資格、專長與授課內容：

(一)應徵資格，符合下列任一條件者均可：

1.      聘任專長相符、相關科系畢業有專任教職、退休高中教師，並具碩士學位以上者。

2.      聘任專長相符、相關科系畢業無專任職務且具以下資格之一：

(1)   具碩士學位以上者。

(2)   具部頒講師以上證書資格者。

(3)   博士班研究生(得有碩士學位或其同等學歷證書)。

（二）教學領域專長及與授課內容：物理專長

  • 三、應徵方式：

（一）準備資料

1.      個人學經歷及自傳。

2.      最高學位證書（國外學歷者需檢附驗證證明）。

3.      教師證書影本(無則免)。

4.      身分證件影本。

（二）意者請檢附以下資料影本於113年12月16日(星期一)前(郵戳為憑)掛號郵寄 「24449 新北市林口區仁愛路一段 2 號國立臺灣師範大學林口校區僑生先修部教務組」，並請於信封上註明「應徵物理兼課及儲備教師」。

  • 四、工作地點：國立臺灣師範大學僑生先修部

新北市林口區仁愛路一段 2 號

  • 五、甄選方式：

（一）本次甄選，僑先部將依113學年度實際班級數調整錄取名額，如應徵者不合適或屆時無課程之需求得從缺。

（二）本次應徵由僑生先修部教學科審查後擇優洽談，未錄取者不另行通知。

  • 六、截止日期：113年12月16日。
  • 七、錄取通知：錄取者個別通知(以電話或E-mail 方式)。
  • 八、附則：

（一）應徵人員繳交各項證件，如有偽造、不實等情事者，取消錄取資格並須自負法律責任。

（二）資料不齊者恕不受理，所寄資料請自留底稿。未獲通知面試或錄取之應徵者如需退還書面應徵資料，可附掛號回郵信封俾利郵寄退件。

（三）本公告未盡事宜，悉依本校相關法令規定辦理。

  • 九、聯絡資訊：

聯絡人：莊詠麟

聯絡電話：02-7749-8263               E-mail：eric6923@ntnu.edu.tw

聯絡地址：新北市林口區仁愛路一段 2 號

12/11【Special lecture】Manipulating elementary excitations in functional quantum materials using resonant X-ray techniques

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時間：12月11日(三) 12：00 ~ 13：20

題目：Manipulating elementary excitations in functional quantum materials using resonant X-ray techniques

講者：曾奕 博士後研究員 Dr. Tseng Yi

服務單位：Deutsches Elektronen Synchrotron, Free-Electron Laser Hamburg

地點：本校科學三館3樓 SC353-2會議室

摘要：
The increasing demand and interests of quantum materials, as well as their intriguing macroscopic manifestation of collective phenomena and exotic properties, have led to unprecedented opportunities for materializing these emergent properties into functional devices, e.g. high-temperature superconductivity, quantum Hall effect, ferroelectricity, etc. In this vein, characterizing the underlying physics highlights a hallmark and unique realization in condensed matter physics, both from a fundamental as well from an applied perspective. In this talk, I will present studies using resonant X-ray spectroscopy techniques on elementary excitations in a number of quantum materials, specifically low-dimensional transition-metal magnets. Such experimental probes are sensitive to all electron degrees of freedom, i.e. lattice, spin, orbital and charge, capable of revealing unique information about the microscopic electronic interactions that are vital to the low-energy Hamiltonian. In addition to the aforementioned research achievements and present focus, future prospect including the ultrafast time control of electronic dynamics will be discussed.

12/12 Multi-messenger signals from magnetized core-collapse supernovae

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時間：12月12日(四) 13：20 ~ 15：10

題目：Multi-messenger signals from magnetized core-collapse supernovae

講者：潘國全 副教授

服務單位：國立清華大學 天文研究所

地點：本校科學三館1樓 SC157

摘要：
Core-collapse supernovae (CCSNe) are among the most explosive events in the universe and are the birthplaces of neutron stars and stellar-mass black holes under extreme conditions. CCSNe are also ideal multi-messenger sources, expected to be detected not only through electromagnetic waves but also via neutrinos and gravitational waves.
In this talk, I will present the latest results from our multi-dimensional supernova simulations with self-consistent neutrino transport. In particular, I will focus on how magnetic fields and stellar rotation affect the explosion engine and multi-messenger signals. I will also comment on further searches for gravitational waves from core-collapse supernovae.