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Strained2DMaterials SIGNED

Unlocking new physics in controllably strained two-dimensional materials

Total Cost €

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EC-Contrib. €

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Partnership

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 Strained2DMaterials project word cloud

Explore the words cloud of the Strained2DMaterials project. It provides you a very rough idea of what is the project "Strained2DMaterials" about.

structure    gap    samples    pseudomagnetic    optical    near    distributions    2dacs    flexural    determined    tmdcs    observe    strained    narrow    indirect    experimental    insulator    softening    fps    electrical    controllably    magnetic    inaccessible    bandgap    plane    weak    quantization    entropic    engineering    amplitudes    excitons    phenomena    shown    binding    spring    polymers    mobility    bilayer    materials    disorder    precisely    suspended    crystals    constant    metal    quasi    adjust    mode    hard    adjusted    situ    dispersion    dichalcogenides    monolayer    2d    interplay    external    look    engineer    dimensional    time    zero    dominate    relation    thermal    phonons    first    topology    dependent    graphene    excitonic    transition    translate    band    mechanical    hall    quantum    energy    atomic    direct    previously    berry    tool    strain    tmdc    emergence    energies    tools    dramatic    uniform    regime    distinguishing   

Project "Strained2DMaterials" data sheet

The following table provides information about the project.

Coordinator
FREIE UNIVERSITAET BERLIN 

Organization address
address: KAISERSWERTHER STRASSE 16-18
city: BERLIN
postcode: 14195
website: www.fu-berlin.de

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Total cost 1˙997˙452 €
 EC max contribution 1˙997˙452 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-11-01   to  2021-10-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    FREIE UNIVERSITAET BERLIN DE (BERLIN) coordinator 1˙997˙452.00

Map

 Project objective

'We will use strain engineering as an enabling tool to study previously inaccessible or hard-to-study phenomena in two-dimensional atomic crystals (2DACs: graphene, bilayer graphene, and monolayer transition metal dichalcogenides). In our first objective, we develop unique experimental tools to control and characterize mechanical strain in 2DACs. These are the distinguishing features of our approach: (i) The use of very low disorder suspended devices; (ii) Both uniform and controlled non-uniform strain will be induced; (iii) The level of strain will be precisely adjusted and determined in-situ during measurements. We will then use controllably-strained samples to study electrical, mechanical, thermal, and optical properties of 2DACs:

Application of strain in suspended graphene will be shown to control amplitudes and dispersion relation of flexural out-of-plane phonons (FPs), a mode unique to 2D and quasi-2D materials. We will demonstrate, for the first time, that FPs dominate electrical, thermal, and mechanical of suspended graphene. Moreover, we will show dramatic mechanical softening of graphene in the regime of weak strain, similar to 'entropic spring' behaviour seen in polymers.

We will engineer strain distributions in high-mobility suspended graphene devices that translate into near-constant 'pseudomagnetic field' and observe Quantum Hall-like quantization at zero external magnetic field.

Strain-induced changes in topology of the band structure of bilayer graphene will be shown to affect Quantum Hall states and the Berry phase.

Through strain engineering, we will controllably adjust - and even make spatially dependent - the band gap energy and binding energies of excitons in monolayer transition metal dichalcogenides (TMDCs). We will study complex interplay between and direct and indirect excitons and look for emergence of a new phase of matter, an excitonic insulator, in strained narrow-bandgap TMDC. '

 Publications

year authors and title journal last update
List of publications.
2017 Ryan J. T. Nicholl, Nickolay V. Lavrik, Ivan Vlassiouk, Bernadeta R. Srijanto, Kirill I. Bolotin
Hidden Area and Mechanical Nonlinearities in Freestanding Graphene
published pages: 266101, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.118.266101
Physical Review Letters 118/26 2020-01-20
2018 Rajan Singh, Ryan J.T. Nicholl, Kirill I. Bolotin, Saikat Ghosh
Motion Transduction with Thermo-mechanically Squeezed Graphene Resonator Modes
published pages: 6719-6724, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.8b02293
Nano Letters 18/11 2020-01-20
2018 Andrey R. Klots, Benjamin Weintrub, Dhiraj Prasai, Daniel Kidd, Kalman Varga, Kirill A. Velizhanin, Kirill I. Bolotin
Controlled dynamic screening of excitonic complexes in 2D semiconductors
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-18803-y
Scientific Reports 8/1 2020-01-20
2018 Xiaomin Xu, Thorsten Schultz, Ziyu Qin, Nikolai Severin, Benedikt Haas, Sumin Shen, Jan N. Kirchhof, Andreas Opitz, Christoph T. Koch, Kirill Bolotin, Jürgen P. Rabe, Goki Eda, Norbert Koch
Microstructure and Elastic Constants of Transition Metal Dichalcogenide Monolayers from Friction and Shear Force Microscopy
published pages: 1803748, ISSN: 0935-9648, DOI: 10.1002/adma.201803748
Advanced Materials 30/39 2020-01-20

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