English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Ultrafast Pathways of the Photoinduced Insulator–Metal Transition in a Low‐Dimensional Organic Conductor

Smit, B., Hüwe, F., Payne, N., Olaoye, O., Bauer, I., Pflaum, J., et al. (2019). Ultrafast Pathways of the Photoinduced Insulator–Metal Transition in a Low‐Dimensional Organic Conductor. Advanced Materials, 2019: 1900652. doi:10.1002/adma.201900652.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0003-4DB5-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-C4CE-8
Genre: Journal Article

Files

show Files
hide Files
:
Smit_et_al-2019-Advanced_Materials.pdf (Publisher version), 2MB
 
File Permalink:
-
Name:
Smit_et_al-2019-Advanced_Materials.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
adma201900652-sup-0001-s1.pdf (Supplementary material), 505KB
 
File Permalink:
-
Name:
adma201900652-sup-0001-s1.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show
hide
Locator:
https://dx.doi.org/10.1002/adma.201900652 (Publisher version)
Description:
-

Creators

show
hide
 Creators:
Smit, B.1, Author
Hüwe, F.2, 3, Author
Payne, N.1, Author
Olaoye, O.1, Author
Bauer, I.4, Author
Pflaum, J.2, 3, Author
Schwoerer, M.4, Author
Schwoerer, H.1, 5, Author              
Affiliations:
1Laser Research Institute, Physics Department, Stellenbosch University, ou_persistent22              
2Experimental Physics VI, Julius-Maximilians-Universität, ou_persistent22              
3Bavarian Center for Applied Energy Research (ZAE Bayern e.V.), ou_persistent22              
4Physikalisches Institut, Universität Bayreuth, ou_persistent22              
5Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              

Content

show
hide
Free keywords: organic molecular conductors; photoinduced phase transitions; structural dynamics; ultrafast electron diffraction
 Abstract: Among functional organic materials, low‐dimensional molecular crystals represent an intriguing class of solids due to their tunable electronic, magnetic, and structural ground states. This work investigates Cu(Me,Br‐dicyanoquinonediimine)2 single crystals, a charge transfer radical ion salt which exhibits a Peierls insulator‐to‐metal transition at low temperatures. The ultrafast electron diffraction experiments observe collective atomic motions at the photoinduced phase transition with a temporal resolution of 1 ps. These measurements reveal the photoinduced lifting of the insulating phase to happen within 2 ps in the entire crystal volume with an external quantum efficiency of conduction band electrons per absorbed photon of larger than 20. This huge cooperativity of the system, directly monitored during the phase transition, is accompanied by specific intramolecular motions. However, only an additional internal volume expansion, corresponding to a pressure relief, allows the metallic state for long times to be optically locked. The identification of the microscopic molecular pathways that optically drive the structural Peierls transition in Cu(DCNQI)2 highlights the tailored response to external stimuli available in these complex functional materials, a feature enabling high‐speed optical sensing and switching with outstanding signal responsivity.

Details

show
hide
Language(s): eng - English
 Dates: 2019-03-122019-01-272019-03-292019-05-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1002/adma.201900652
 Degree: -

Event

show

Legal Case

show

Project information

show hide
Project name : This work is based upon research supported by the South African Research Chair Initiative of the Department of Science and Technology, the National Research Foundation and the Deutsche Forschungsgemeinschaft (Project No. PF 385/6‐1 and SCHW 130/16‐1), the DFG research unit FOR1809 and the DFG priority program GRK 2112. The authors acknowledge discussions with Nicolas Erasmus, Catherine Esterhuysen, Laurent René de Cotret and Stuart Hayes, and support of the molecular synthesis by Peter Strohriegl. The authors also thank Vincent Smith for the X‐ray structural analysis of Cu(Me,Br‐DCNQI)2 crystals.
Grant ID : -
Funding program : -
Funding organization : -

Source 1

show
hide
Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 2019 Sequence Number: 1900652 Start / End Page: - Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855