PGI Colloquium - Hybrid Event: Prof. Dr. Alexander Gray, Temple University, Philadelphia, USA

8th July 2022 09:00 AM
8th July 2022 10:30 AM

Hybrid Event

Please note: There will be a limited number of seats available in the PGI Lecture Hall. You may furthermore join by video conference. Detailed information will be communicated by email, usually about a week before the lecture takes place. It is also available on request from the contact person below.

Emergent Phenomena at Oxide Interfaces and 2D Layers Studied with Standing-wave Photoelectron Spectroscopy 

Prof. Dr. Alexander Gray

Emergent phenomena at complex-oxide interfaces have become a vibrant field of study in the past two decades due to the rich physics and a wide range of possibilities for creating new states of matter and novel functionalities for potential devices. Electronic-structural characterization of such phenomena presents a unique challenge due to the lack of direct yet non-destructive techniques for probing buried layers and interfaces with the required Ångstrom-level resolution, as well as element and orbital specificity.

In this colloquium talk, I will survey several recent studies wherein soft x-ray standing-wave photoelectron spectroscopy, a relatively newly developed technique, is used to investigate buried oxide interfaces exhibiting emergent phenomena such as metal-insulator transition, interfacial ferromagnetism, and two-dimensional electron gas. Advantages, challenges, and future applications of this methodology to the studies of two-dimensional and quantum materials will also be discussed.


C.-T. Kuo et al., J. Vac. Sci. Technol. A 40, 020801 (2022).

J. Wang et al., Chem. Mater. 33, 1811 (2021).

A. Arab et al., Nano Lett. 19, 8311 (2019).

W. Yang et al., Phys. Rev. B 100, 125119 (2019).

R. U. Chandrasena et al., Phys. Rev. B 98, 155103 (2018).


Daniel Bürgler

Telefon: +49 2461 61-4214

Fax:  +49 2461 61-4443


Last Modified: 10.08.2022