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Nanophononics: Phonon transport and interference in nanostructures

English title Nanophononics: Phonon transport and interference in nanostructures
Applicant Zardo Ilaria
Number 165784
Funding scheme Project funding (Div. I-III)
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Condensed Matter Physics
Start/End 01.04.2016 - 31.03.2019
Approved amount 450'000.00
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All Disciplines (2)

Discipline
Condensed Matter Physics
Material Sciences

Keywords (8)

Raman; thermoelectrics; phonons; nanowires; Phonon interference; Phonon transport; renewable energy; quantum computation

Lay Summary (Italian)

Lead
I fononi sono quasi-particelle che descrivono le vibrazioni atomiche all’interno di un reticolo. In particolare sono determinanti nelle proprietà termiche di un materiale e nella propagazione del suono in un mezzo. La capacità di controllare le proprietà termiche di un materiale è particolarmente importante per applicazioni termoelettriche. Inoltre, essendo delle quasi-particelle come elettroni e fotoni, anche i fononi sono soggetti al dualismo onda-particella che, per esempio, permette di osservare fenomeni di interferenza tra fononi sotto opportune condizioni.
Lay summary

Soggetto e obiettivo

Il nostro obiettivo principale è il raggiungimento di una maggiore comprensione e capacità di controllo delle proprietà dei fononi in materiali nanostrutturati. Più precisamente esploreremo il trasporto dei fononi e realizzeremo esperimenti di interferenza tra fononi in nanofili semiconduttori. I nanofili sono strutture quasi unidimensionali la cui sezione ha dimensioni nanometriche, mentre la lunghezza può raggiungere diverse decine di micrometri. Gli studi saranno condotti su nanofili composti da diversi materiali o nanofili con ramificazioni e saranno eseguiti combinando tecniche spettroscopiche ed esperimenti di trasporto.

 

Contesto socio-scientifico

La ricerca proposta permetterà una comprensione maggiore della fisica dei fononi e quindi una maggiore capacità di controllo e progettazione delle proprietà termiche delle nanostrutture. Questo è in ingrediente fondamentale per migliorare l’efficienza di dispositivi termoelettrici che sono alla base di una delle tecnologie per le energie rinnovabili. Inoltre, al fine di realizzare gli esperimenti proposti, verranno sviluppate nuove tecniche sperimentali di interesse per la comunità scientifica.

Direct link to Lay Summary Last update: 08.04.2016

Responsible applicant and co-applicants

Employees

Publications

Publication
Manipulating phonons at the nanoscale: Impurities and boundaries
Zardo Ilaria, Rurali Riccardo (2019), Manipulating phonons at the nanoscale: Impurities and boundaries, in Current Opinion in Green and Sustainable Chemistry, 17, 1-7.
Quasi One-Dimensional Metal–Semiconductor Heterostructures
Benter S., Dubrovskii V. G., Bartmann M., Campo A., Zardo I., Sistani M., Stöger-Pollach M., Lancaster S., Detz H., Lugstein A. (2019), Quasi One-Dimensional Metal–Semiconductor Heterostructures, in Nano Letters, 19(6), 3892-3897.
Phonon Engineering in Twinning Superlattice Nanowires
De LucaMarta, FasolatoClaudia, VerheijenMarcel A., RenYizhen, SwinkelsMilo Y., KöllingSebastian, BakkersErik P.A.M., RuraliRiccardo, CartoixàXavier, ZardoIlaria (2019), Phonon Engineering in Twinning Superlattice Nanowires, in Nano Letters, ASAP.
Crystalline, Phononic, and Electronic Properties of Heterostructured Polytypic Ge Nanowires by Raman Spectroscopy
Fasolato Claudia, De Luca Marta, Djomani Doriane, Vincent Laetitia, Renard Charles, Di Iorio Giulia, Paillard Vincent, Amato Michele, Rurali Riccardo, Zardo Ilaria (2018), Crystalline, Phononic, and Electronic Properties of Heterostructured Polytypic Ge Nanowires by Raman Spectroscopy, in Nano Letters, 18(11), 7075-7084.
Effects of dielectric stoichiometry on the photoluminescence properties of encapsulated WSe2 monolayers
Martín-Sánchez Javier, Mariscal Antonio, De Luca Marta, Martín-Luengo Aitana Tarazaga, Gramse Georg, Halilovic Alma, Serna Rosalía, Bonanni Alberta, Zardo Ilaria, Trotta Rinaldo, Rastelli Armando (2018), Effects of dielectric stoichiometry on the photoluminescence properties of encapsulated WSe2 monolayers, in Nano Research, 11(3), 1399-1414.
A review on III–V core–multishell nanowires: growth, properties, and applications
Royo Miquel, De Luca Marta, Rurali Riccardo, Zardo Ilaria (2017), A review on III–V core–multishell nanowires: growth, properties, and applications, in Journal of Physics D: Applied Physics, 50(14), 143001-143001.
Semiconductor Nanowires: Raman Spectroscopy Studies
De Luca Marta, Zardo Ilaria (2017), Semiconductor Nanowires: Raman Spectroscopy Studies, in Maaz Khan (ed.), InTech, Croatia, 81.

Collaboration

Group / person Country
Types of collaboration
Prof. Alois Lugstein Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Lucia Sorba, Nest, CNR Nano Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Dr. Laetitia Vincent France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Xavier Cartoixa Soler Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Dr. Riccardo Rurali Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Prof. Erik Bakkers, Photonics and Semiconductor Nanophysics, Dep. of Physics, TU/e (Eindhoven) Netherlands (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
NCCR QSIT General Meeting Talk given at a conference Nanophononics with nanowires 06.02.2019 Arosa, Switzerland Zardo Ilaria;
Seminar at the department of Quantum Nanoscience of the TU Delft Individual talk Growth of Si-Ge nanowires for thermal applications 28.01.2019 Delft, Netherlands Gadea Diez Gerard;
Nanoscale and Microscale Heat Transfer VI (NMHT-VI), Eurotherm Seminar No 111 Talk given at a conference Measuring the thermal conductivity of single semiconductor nanowires 04.12.2018 Levi, Finland Campo Alessio;
Nanoscale and Microscale Heat Transfer VI (NMHT-VI), Eurotherm Seminar No 111 Poster Thermal Rectification in Telescopic Nanowires 02.12.2018 Levi, Finland Campo Alessio;
Seminar at the NanoLund, Center for Nanoscience at Lund University Talk given at a conference Phonon engineering & manipulation with Nanowires 13.09.2018 Lund, Sweden Zardo Ilaria;
Swiss Nanoconvention 2018 Talk given at a conference Phonon engineering & manipulation with Nanowires 06.06.2018 Zürich, Switzerland Zardo Ilaria;
Phonons 2018 & PTES 2018 Joint Conference Talk given at a conference Phonon engineering & manipulation with Nanowires 03.06.2018 Nanjing , China Zardo Ilaria;
1st Workshop on Thermo-Electric Transport with Nanowires Poster Thermal Rectification in Telescopic Nanowires 11.12.2017 Eindhoven, Netherlands Campo Alessio;
QSQT Research Seminar: poster session Poster Thermal Rectification in Telescopic Nanowires 14.11.2017 Basel, Switzerland Campo Alessio;
TCM 2017 Talk given at a conference Thermal transport in semiconductor nanowires 19.10.2017 Menorca, Spain Zardo Ilaria;
FISMAT 2017 Talk given at a conference Nanophononics: Phonon engineering and manipulation 01.10.2017 Trieste, Italy Zardo Ilaria;
Thermoelectric Materials: From Theoretical Design to Industrial Application Poster Semiconductor nanowires as efficient thermoelectric nanomaterials 03.07.2017 Cork, Ireland Campo Alessio;
Nanophononics today and perspectives Individual talk Seminar at the CSIC-ICMAB Institute 26.06.2017 Barcelona, Spain Zardo Ilaria;
Nanowire Week Poster Strain and composition effects on Raman vibrational modes of hexagonal GaP/SiGe core-shell nanowires 29.05.2017 Lund, Sweden Azdad Zakaria;
MRS Spring Meeting Talk given at a conference Investigating the Thermoelectric Properties of Semiconductor Nanowires 19.04.2017 Phoenix, United States of America Zardo Ilaria;
Seminar at the Technical University of Delft Individual talk Nanophononics: phonon engineering and manipulation 25.01.2017 Delft, Netherlands Zardo Ilaria;
Colloquium of the Physics department at the Johannes Kepler University of Linz (Austria) Individual talk Nanophononics: phonon engineering and manipulation 19.01.2017 Linz, Austria Zardo Ilaria;
MRS Fall Meeting Talk given at a conference Assessment of thermoelectric properties of semiconducting nanowires 02.12.2016 Boston, United States of America Zardo Ilaria;
Swiss Nanoconvention 2016 Talk given at a conference Thermoelectric properties of single nanowires 30.06.2016 Basel, Switzerland Zardo Ilaria;
CIMTEC 2016 Talk given at a conference Thermoelectric properties of semiconducting nanowires 07.06.2016 Perugia, Italy Zardo Ilaria;
Seminar for the Institute of Materials Individual talk Nanophononics and heat transport in nanowires 06.04.2016 Ecole Polytechnique Federale de Lausanne, Switzerland Zardo Ilaria;


Self-organised

Title Date Place
1st Workshop on Thermoelectric transport in Nanowires 11.12.2017 Eindhoven, Netherlands

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Schülerpraktikum for the Sekundarschule Hittnau Performances, exhibitions (e.g. for education institutions) 19.03.2019 Basel, Switzerland Campo Alessio; Zardo Ilaria;
Techday at Cantonal Gymnasium in Mendrisio Performances, exhibitions (e.g. for education institutions) 22.11.2018 Mendrisio, Switzerland Zardo Ilaria;
Find your number day at the Gymnasium am Münsterplatz Talk 18.06.2018 Basel, Switzerland Zardo Ilaria;
Sonderwoche 2017 for the Gymasium Münchenstein Talk 29.09.2017 Basel, Switzerland Zardo Ilaria;
"Find your number day" program at the Gymnasium am Münsterplatz Talk 09.06.2017 Basel, Switzerland Zardo Ilaria;
Lehrer Event organized by Swiss Nanoscience Institute Talk 04.06.2017 Basel, Switzerland Zardo Ilaria;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Saturday Morning Physics German-speaking Switzerland 2018
Talks/events/exhibitions Quanten und Nanowelten German-speaking Switzerland 2016

Associated projects

Number Title Start Funding scheme
170741 Time resolved and stimulated Raman spectroscopy 01.12.2016 R'EQUIP
184942 Phonon Interference in nanostructures 01.04.2019 Project funding (Div. I-III)

Abstract

In the last decades, the power to control photons and electrons paved the way for extraordinary technological developments in electronic and optoelectronic applications.The understanding and ability to manipulate phonons as coherent waves in solids enables the control of heat conduction, which is of fundamental interest and could also be exploited in applications. Namely, phonon management and control over the interaction between phonons and charges, spins or photons is key to develop electronic, optoelectronic, quantum, sonic and thermal devices. In this respect, semiconductor nanostructures offer the possibility to modify to a large extent their phonon properties. In particular, nanowires (NWs) are a model system for 1D phonon transport and can exhibit modified phonon dispersion with eventually the appearance of surface phonon modes. Finally, NWs can be used as a template for more complex novel architectures, where phonon transport and phonon scattering can be engineered. Despite the several theoretical studies on phonon conduction in 1D nanostructures, there are still several open questions, which need to be addressed experimentally. This proposal aims at investigating and engineering phonon transport and phonon interference effects in NW-based heterostructures by means of a combination of spectroscopy techniques and transport experiments. The proposed research will be of great relevance for fundamental research as well as for technological applications.Phonon interference experiments (project A) Photons and electrons have been subject of studies exploiting their quantum-mechanical nature for a long time. Recently, researchers are trying to expose the quantum-mechanical nature of collective excitations like phonons, which is crucial for the understanding of the physics and the development of sonic and thermal materials and devices. In this proposal, single crystalline NW crosses are the platform for phonon interference experiments. Coherent phonon transport (project B) Coherent phonon heat transport can occur in periodic heterostructures. However, this regime was achieved only below150 K due to the quality of the interfaces. In this project, phonon transport regimes will be investigated in crystal-phase superlattice NWs exhibiting high structural quality. Phonon interference and phonon transport experiments will be realized with time-resolved Raman spectroscopy measurements and developing a thermal conductivity spectroscopic method by combining pump-probe Raman spectroscopy with electrical measurements synchronizing laser and electrical pulses.Thermoelectric properties of topological insulator nanowires (project C): Waste heat recovery through high-efficiency thermoelectric (TE) converters can have a major impact on energy production and enable new self-powered device applications. However, the adoption of TE devices is nowadays limited by their poor efficiency: good TE materials should exhibit high power factor and low thermal conductivity, but this elusive target has challenged researchers for decades. Topological insulators (TI) are a recently discovered class of materials, where edge or surface states electron transport is naturally protected from scattering. Therefore, this property can be used to decouple electron and phonon transport. Theoretical studies predict a significantly enhanced efficiency of TIs, but such effects have not been experimentally demonstrated yet. Hereby, the TE properties of TI NWs will be extensively investigated with the use of suspended SiNx membranes with integrated microheaters.
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