1

報告人：勝獻雷，北京航空航天大學

時間：5月20日（周二）14:00

單位：中國科學院物理研究所

地點：物理所M樓631

騰訊會議ID：795-238-455

摘要：

高階拓撲絕緣體是近幾年提出的一類新奇拓撲物態。我們計算預測已經在實驗上合成的石墨炔是一個二維二階拓撲絕緣體材料，構建了第二類Stiefel-Whitney數（實陳數）與二階拓撲絕緣體之間的聯系，提出了一類磁性二維二階拓撲絕緣體的普適構建方案，并預言Bi/EuO結構是磁性二維二階拓撲絕緣體。拓展到三維，預測三維石墨二炔是三維二階實陳數節線半金屬，三維石墨一炔則是三維二階實陳數拓撲絕緣體。在非線性霍爾效應領域，提出外爾半金屬可增強本征非線性平面霍爾效應。通過模型研究，我們發現增強效應主要源于軌道貢獻，基于第一性原理計算，在材料CuTlSe2中計算了這些特性。

報告人簡介：

勝獻雷，北京航空航天大學物理學院，教授，博導。2011年博士畢業于中國科學院大學，先后在美國加州州立大學、中國科學院物理研究所、美國特拉華大學和新加坡科技設計大學做博士后或訪問學者。2015年入職北航物理學院，長期從事計算凝聚態物理研究，尤其是材料拓撲物性、磁性與輸運性質的計算研究，在PRL，NatureComm，PRB等期刊發表SCI論文60余篇。

2

報告人：楊帆，天津大學

時間：5月20日（周二）15:00

單位：中國科學院物理研究所

地點：物理所M樓631

騰訊會議ID：795-238-455

摘要：

TiSe2 is a typical transition-metal dichalcogenide known for its charge-density wave order. In this study, we report the observation of an unusual anisotropic negative magnetoresistance in exfoliated TiSe2 nanoflakes at low temperatures. Unlike the negative magnetoresistance reported in most other transition-metal dichalcogenides, our results cannot be explained by either the conventional two-dimensional weak localization effect or the Kondo effect. A comprehensive analysis of the data suggests that the observed anisotropic negative magnetoresistance in TiSe2 flakes is most likely caused by the three-dimensional weak localization effect. Our findings offer valuable information for understanding the phase-coherent transport processes in TiSe2.

報告人簡介：

楊帆，2007年本科畢業于南京大學物理系，2012年于中科院物理所獲得博士學位，2012-2018年先后在大阪大學和科隆大學從事博士后研究，2018年至今在天津大學物理系量子交叉研究中心工作，任北洋英才計劃長聘副教授、研究員。楊帆的主要研究方向為量子輸運和微納米量子器件，共發表論文20余篇，被引用2000余次。

3

報告人：S.R.Kulkarni，加州理工學院光學天文臺

時間：5月20日（周二）15:30

單位：北京大學物理學院

地點：KIAA-auditorium

摘要：

Following the Big Bang the Universe was homogeneous in matter, energy and barren of chemistry. It is the stars which, through their life and death, built up the periodic table. Astronomers have now identified several classes of cosmic explosions of which supernovae constitute the largest group. The Palomar Transient Factory was an innovative 2-telescope, and its successor, the Zwicky Transient Factory (ZTF), is a high tech project with gigantic CCD cameras and sophisticated software system, and squarely aimed to systematically find "blips and booms in the middle of the night".

The speaker will talk about the great returns and surprises from this project: super-luminous supernovae, new classes of transients, new light on progenitors of supernovae, detection of gamma-ray bursts by purely optical techniques, routine identifications of planets being engulfed by their aging parent stars and troves of pulsating stars and binary stars. ZTF is poised to become the stepping stone for the national flagship project, the Rubin Observatory.

報告人簡介：

S. R. Kulkarni is the George Ellery Hale Professor of Astronomy at the California Institute of Technology. He served as Executive Officer for Astronomy (1997-2000) and Director of Caltech Optical Observatories for the period 2006-2018. He was recognized by Cornell University with an AD White Professor-at-Large appointment. Kulkarni received an honorary doctorate from the Radboud University of Nijmegen, The Netherlands. He is the Chair of the Physical Sciences panel of the Infosys Science Foundation. Kulkarni obtained his undergraduate degree from the Indian Institute of Technology, Delhi and his PhD from UC Berkeley. He served a brief period as a postdoc at UC Berkeley and Caltech before joining the faculty rank at Caltech in 1987. Prof. Kulkarni's primary interests are the study of compact objects (neutron stars and gamma-ray bursts) and cosmic explosions. He is keenly interested in developing or refining astronomical methodologies. His awards include NSF's Alan T. Waterman Prize of the NSF, a fellowship from the David and Lucile Packard Foundation, a Presidential Young Investigator award from the NSF, the Helen B. Warner award of the American Astronomical Society, the Janksy Prize of Associated Universities, Inc, the Dan David Prize and the Shaw Prize. Kulkarni is a fellow or member of the following learned societies: the American Academy of Arts & Sciences, the Royal Society of London, the US National Academy of Sciences, Indian Academy of Sciences and the Royal Netherlands Academy of Arts and Sciences (KNAW).

4

報告人：Masao Doi，Nagoya University

時間：5月20日（周二）16:00

單位：中國科學院理論物理研究所

地點： 北樓202

5

報告人：江云峰，東南大學

時間：5月21日（周三）14:00

單位：中國科學院理論物理研究所

地點：北樓322

摘要：
Integrability is interesting, often associated with remarkable phenomena such as the existence of infinitely many conserved charges, factorized scattering and exact solvability. On the other hand, it is probably even more interesting to break integrability, giving rise to new phenomena such as particle production, resonance states, and notably, soliton confinements. In this talk, I will first review confinement in Ising field theory and the theoretical works to determine the associated meson spectrum. I will then present recent work in which we explore analogous phenomena in an Ising ladder system. In this setting, we observe similar confinement mechanisms but encounter a richer meson spectrum, including both interchain and intrachain mesons. I will discuss the methods used to determine these spectra and present the key findings of our study.

6

報告人：高尚，中國科學技術大學

時間：5月21日（周三）15:00

單位：北京大學物理學院

地點：物理樓，西563會議室

7

報告人：褚衍輝，華南理工大學

時間：5月22日（周四）10:00

單位：中國科學院物理研究所

地點：物理所M樓253

騰訊會議ID：993-486-049

摘要：

高熵陶瓷因具有巨大的組分空間，獨特的微觀結構以及可調控的性能近年來受到國內外研究學者的廣泛關注，我們在國際上較早地開展了高熵超高溫陶瓷材料研究，開發出系列高熵超高溫陶瓷材料，建立了精準的相形成能力判據以及可遷移的機器學習勢函數，實現了對其力-熱性能的精準預測；發明了多種合成高熵超高溫陶瓷粉體的方法，制備出系列高品質粉體，實現了公斤級批量化生產；揭示了高熵超高溫陶瓷晶格畸變與力-熱-電-磁性能之間的關聯機理，開發出高韌、高強、高隔熱、寬吸波高熵陶瓷材料；闡明了高熵陶瓷多組元協同抗氧化機制，開發出耐3600℃抗氧化高熵碳化物陶瓷材料。

報告人簡介：

褚衍輝，華南理工大學研究員、博士生導師，2016年博士畢業于西北工業大學，其中2014年1月至2015年9月在美國哈佛大學博士聯合培養。2017年開始從事高熵陶瓷材料研究工作，以第一或通訊作者在Nat Commun、Matter、Adv Mater、Adv Funct Mater、Acta Mater等期刊發表SCI論文100余篇，獲授權國家發明專利30余件，主持基金委優青、科技部重點研發計劃青年科學家等項目，曾獲美國陶瓷學會Ross Coffin Purdy獎、教育部自然科學獎一等獎等，兼任中國硅酸鹽學會測試技術分會副秘書長、《Journal of Materiomics》和《Int. J. Appl. Ceram. Technol.》期刊編委等。

8

報告人：Yakov Fominov，L.D. Landau Institute of Theoretical Physics, Russian Academy of Sciences

時間：5月22日（周四）15:00

單位：中國科學院理論物理研究所

地點：Lecture Hall on the 5th Floor of CCAST

Zoom Meeting ID: 825 1553 1170

Passcode: 654432

摘要：

In this talk, I will discuss the rapidly developing field of nonreciprocal effects in superconducting transport, also known as the superconducting diode effect. The essence of this phenomenon lies in the asymmetry of a system's properties when a supercurrent tlows in opposite directions. Such an effect requires the simultaneous breaking of tme-reversal and inversion symmetries. The underlying physical mechanisms can vary significantly, including effects of magnetic (and, more specifically, exchange) fields, spin-orbit interactions, and geometric asymmetry of the system. These effects can lead to nonreciprocacharge transport both in systems homogeneous along the current direction and in Josephson junctions.

9

報告人：楊明，香港理工大學

時間：5月22日（周四）15:00

單位：北京大學物理學院

地 點：物理大樓中212報告廳

摘要：

Two-dimensional (2D) semiconductors such as monolayer MoS? hold significant promise for advancing nanoelectronics. However, integrating high-k dielectrics with 2D semiconductors to achieve high performance devices remains a challenge. In this talk, I will present our understanding of designing high-performance interfaces between high-k dielectrics and 2D MoS2. First, we demonstrate that hydrogenation is an effective method for passivating dangling bonds at the interface between conventional high-k dielectrics and MoS?, in which hydrogenation selectively occurs on high-k dielectrics such as Si3N4 and HfO2 without affecting the MoS2. Second, we introduce a data-driven approach to expedite the discovery of inorganic molecular crystals (IMCs) as high-k dielectrics. From enormous candidates in Materials Project, we identify 9 IMCs as the promising high-k dielectrics for 2D semiconductors. These findings advance the understanding of integrating high-k dielectrics with 2D semiconductors and could be useful for the development of a wide range of 2D electronic and optoelectronic devices.

報告人簡介：

Dr. Ming Yang is currently an Assistant Professor in the Department of Applied Physics at The Hong Kong Polytechnic University (PolyU). He earned his Ph.D. from the National University of Singapore (NUS), where he also conducted postdoctoral research. Following this, Dr. Yang served as a Scientist at the Institute of Materials Research and Engineering in Singapore. Dr. Yang’s research focuses on accelerating the development of functional materials for advanced applications through high-throughput screening techniques, large-scale density functional theory (DFT) calculations, and machine learning. To date, Dr. Yang has authored or co-authored over 200 peer-reviewed articles in renowned journals, contributed to two book chapters, and filed three patents.

10

報告人：王明聰，大灣區大學（籌）

時間：5月23日（周五）10:00

單位：中國科學院物理研究所

地點：懷柔園區MA樓505會議室

騰訊會議：754-849-575

會議密碼：2025

摘要：

YBCO超導薄膜的電學性能一致性與表面粗糙度和厚度均勻性的控制高度相關。然而，傳統接觸式等表征手段難以滿足量產工藝對在線監測的高通量、無損化需求。本報告聚焦光學多模態無損表征技術，解析如何通過寬場干涉顯微術實現納米級粗糙度的快速全場映射，以及如何通過X射線反射/熒光光譜完成薄膜厚度的大面積掃描快速掃描，為PLD/MOCVD工藝研發人員提供及時和無損的質量評估手段，為工藝窗口的優化提供數據支撐。

報告人簡介：

王明聰，四川大學學士和碩士、中國工程物理研究院博士、阿卜杜拉國王科技大學博士后研究員，現任大灣區大學（籌）特聘研究員、助理教授，主要從事超快激光光譜技術（瞬態吸收、太赫茲光譜、時間分辨光致發光光譜）及其在拓撲、超導、光伏和發光材料中的應用研究，在PRL、Nat.Commum.、Angew.Chem.等期刊發表多篇唯一第一作者學術論文，入選教育部海外青年人才、蘇州汾彩領軍人才、東莞市特色人才，兼任松山湖材料實驗室客座研究員、東莞市微納光場調控與感知重點實驗室副主任。

11

報告人：Jo?o Maia，Peking University

時間：5月23日（周五）10:30

單位：中國科學院理論物理所

地 點：北樓322

摘要：

The long-range Ising model extends the classical Ising framework by allowing every pair of spins to interact, with interaction strength decaying polynomially in the distance between them. In one dimension, this system—often referred to as the Dyson model—exhibits spontaneous magnetization at sufficiently low temperature, a phenomenon absent in its nearest-neighbour counterpart. Another variation of the Ising model, called the random field Ising model (RFIM), incorporates an independent Gaussian random external field acting on each site. This model has garnered significant interest recently, and it is most notorious for its lack of a phase transition in two dimensions.

In this talk, I will present recent results on the existence and nature of phase transitions in the long-range RFIM. I will describe the techniques used to establish these findings and outline open problems and potential avenues for future research.

報告人簡介：

Jo?o Maia is a postdoctoral researcher at Peking University under the supervision of Jian Ding. He earned his Ph.D. from the University of S?o Paulo, working under the supervision of Rodrigo Bissacot. His research focuses on classical statistical mechanics, with particular emphasis on long-range models and systems subject to external perturbations.

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