NEWS & EVENTS Event Calendars Event

Time & Date

14:00-15:30, Tuesday, April 13th, 2021

Venue

Room 211, Building 4, Yunqi Campus

Host

Dr. Shi Liu, PI of School of Science, Westlake University

Audience

Faculty and Staff,Graduate Students,Undergraduate Students

Category

Academics and Research

Physics Colloquium | Yuefeng Nie: Freestanding perovskite oxides – a new playground for emergent 2D correlated phases

Time:14:00-15:30, Tuesday, April 13th, 2021

Host:Dr. Shi Liu, PI of School of Science, Westlake University

Venue:Room 211, Building 4, Yunqi Campus


Speaker:

Professor Yuefeng Nie

Department of Materials Science and Engineering, Nanjing University


Biography:


Yuefeng Nie is a professor in the department of Materials Science and Engineering at Nanjing University. After receiving a B.S. and a M.S. degree in Physics from Zhongshan University, he did graduate work in Physics at the University of Connecticut, receiving a Ph.D. in 2011. He was then a post-doc in Cornell Center for Materials Research (CCMR) at Cornell University. In late 2014, he joined the faculty in MSE at Nanjing University. His research focuses on the emergent phases such as multiferroicity and high Tc superconductivity in transition metal oxide thin films and heterostructures by oxide molecular-beam epitaxy (MBE) and in situ angle-resolved photoemission spectroscopy (ARPES). His has published over 40 papers in high-impact journals, including Nautre,NautreCommunications, and Physical Review Letters. Especially, he advanced the atomic-scale precise thin film growth technique and synthesized ultrathin freestanding perovskite oxides down to the monolayer limit, providing new opportunities in the exploration of two-dimensional (2D) correlated quantum phases in perovskite oxides.


Abstract:


Two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMD) have demonstrated how the new electronic phases emerge when a bulk crystal is thinned down to a mono-layer. As transition metal perovskite oxides host a variety of correlated phases, realizing the analogs with transition metal perovskite oxides would open the door to a rich spectrum of exotic 2D correlated phases that have not yet been explored. However, the three-dimensional crystalline structure of perovskite oxides hinders the synthesis of 2D materials by a simple mechanical exfoliation method. Here we advanced the atomic-scale precise thin film growth methodsbased on reactive molecular beam epitaxy (MBE) and synthesized ultrathin freestanding perovskite oxides down to the monolayer limit [1-3]. The ability to synthesize and transfer crystalline freestanding perovskite films without thickness limitation onto any desired substrate opens a new field for the 2D correlated electronic phases and interfacial phenomena that technically have not yet been accessible.

If time allows, the design and engineering of 2D phases in ultrathin oxide thin films by MBE and angle-resolved photoemission spectroscopy (ARPES) will be also discussed [4-6].

[1] D.X. Ji, et al., Nature 570 87–90 (2019)

[2] Han Lu, et al., Adv. Mater. Interfaces 1901604 (2020)

[3] H.Y. Sun, et al., Nat. Commun. 9.1, 2965 (2018)

[4] Y.F. Nie, et al., Phys. Rev. Lett. 114, 016401 (2015)

[5] W. Guo, et al., Phys. Rev. B 101, 085101 (2020)

[6] X. Chen, et al., ACS Appl. Mater. Interfaces 13, 7812 (2021)

Contact:

wuyunqin@westlake.edu.cn



Time & Date

14:00-15:30, Tuesday, April 13th, 2021

Venue

Room 211, Building 4, Yunqi Campus

Host

Dr. Shi Liu, PI of School of Science, Westlake University

Audience

Faculty and Staff,Graduate Students,Undergraduate Students

Category

Academics and Research