Next colloquium

Next colloquium

Wednesday, 21 November at 3 pm

Leo Molina-Luna

Electric field in situ TEM of functional materials: towards atomic-resolution operando nanoscopy

Abstract

Recent advances in microelectromechanical systems (MEMS) based chips for in situ transmission electron microscopy are opening exciting new avenues in nanoscale research. The capability to perform current-voltage measurements while simultaneously analyzing the corresponding structural, chemical or even electronic structure changes during device operation would be a major breakthrough in the field of nanoelectronics and beyond.  We aim to directly link the atomic structure to the physical properties under working or so called operando conditions. Shown in figure 1 is an electro-thermal chip sample carrier that allows the combined application of an electrical bias with a thermal gradient directly inside a transmission electron microscope [2]. With this setup, in situ atomic-resolution experiments on functional materials systems and electronic devices are possible. This talk will address the challenges, recent advances and possibilities of the field. Furthermore, I will present our efforts in systems that are relevant for random access memory devices (RRAM) [1], tunable microwave applications and nanomaterials with switchable polarization that are indispensable in memory devices, sensors, actuators, and transducers [2].

References

[1] A. Zintler et al., “FIB based fabrication of an operative Pt/HfO2/TiN device for resistive switching inside a transmission electron microscope,” Ultramicroscopy, vol. 181, no. Supplement C, pp. 144–149, Oct. 2017.

[2] L. Molina-Luna et al., “Enabling nanoscale flexoelectricity at extreme temperature by tuning cation diffusion,” Nature Commun., vol. 9, no. 1, Dec. 2018.

Colloquia 2018/19

Colloquia 2018/19

2018

Date

Speaker

Title

19/09/2018

Daniele Faccio (Glasgow)

Viewing the world with quantum eyes

26/09/2018

Steve Barnett (Glasgow)

Vacuum friction and related puzzles

10/10/2018

Daniel J. Smith (Glasgow)

Mental health research using large-scale population data

24/10/2018

Laura Nuttall (Portsmouth)

How data quality affects the search for gravitational waves and the resulting astrophysical implications

7/11/2018

Ilja Gerhardt (MPI-FKF Stuttgart)

Polarization entangled photon pairs from a single molecule

21/11/2018

Leo Molina-Luna (TU Darmstadt)

Electric field in situ TEM of functional materials: towards atomic-resolution operando nanoscopy

5/12/2018

Christian Bonato (Heriot-Watt)

Quantum technology with single spins

2019

Date

Speaker

Title

16/01/2019

Sally Jordan (Open University)

tba 

23/01/2019

Ed Daw (Sheffield)

Hunting for axions with ADMX

06/02/2019

Viv Kendon (Durham)

Computational quantum walks with cooling

20/02/2019

Lily Asquith (Sussex)

tba

6/03/2019

Susan Smith (ATLAS)

tba

20/03/2019

tba

 

17/4/2019

Sneha Malde (Oxford)

tba