Publications de Heidi Andrea Potts

Questioning liquid droplet stability on nanowire tips: from theory to experiment

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Lucas Güniat, Martin George Friedl, Heidi Andrea Potts, William Craig Carter, Mahdi Zamani, Lea Ghisalberti

2019

Segregation scheme of indium in AlGaInAs nanowire shells

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Simon Robert Escobar Steinvall, Sara Marti Sanchez

2019

Unveiling Temperature-Dependent Scattering Mechanisms in Semiconductor Nanowires Using Optical-Pump Terahertz-Probe Spectroscopy

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Francesca Amaduzzi, Heidi Andrea Potts

Optical-pump terahertz-prohe (OPTP) spectroscopy is a powerful, non-contact tool for extracting the electrical conductivity within a material. In this work, we show how OPTP spectroscopy can he used to extract the temperature-dependent electron mobility an ...

IEEE2019

Fundamental aspects to localize self-catalyzed III-V nanowires on silicon

Anna Fontcuberta i Morral, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, William Craig Carter, Lea Ghisalberti, Wonjong Kim, Vladimir Dubrovskii

III-V semiconductor nanowires deterministically placed on top of silicon electronic platform would open many avenues in silicon-based photonics, quantum technologies and energy harvesting. For this to become a reality, gold-free site-selected growth is nec ...

Nature Research2019

Template-Assisted Scalable Nanowire Networks

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Lucas Güniat, Martin George Friedl, Heidi Andrea Potts, Mahdi Zamani, Wonjong Kim, Sara Marti Sanchez, Vladimir Dubrovskii

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of ...

American Chemical Society (ACS)2018

Dataset for "Template-assisted scalable nanowire networks"

Anna Fontcuberta i Morral, Martin George Friedl, Heidi Andrea Potts, Mahdi Zamani, Wonjong Kim

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of ...

Zenodo2018

Bistability of Contact Angle and Its Role in Achieving Quantum-Thin Self-Assisted GaAs nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Lucas Güniat, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Wonjong Kim, Vladimir Dubrovskii

American Chemical Society (ACS)2018

High Electron Mobility and Insights into Temperature-Dependent Scattering Mechanisms in InAsSb Nanowires

Anna Fontcuberta i Morral, Francesca Amaduzzi, Heidi Andrea Potts

American Chemical Society (ACS)2018

Anisotropic-Strain-Induced Band Gap Engineering in Nanowire-Based Quantum Dots

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Lucas Güniat, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Andrea Giunto, Wonjong Kim, Pablo Romero Gómez

American Chemical Society (ACS)2018

Imaging Stray Magnetic Field of Individual Ferromagnetic Nanotubes

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Lucas Güniat, Dirk Grundler, Reza Zamani, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Nicola Rossi, Wonjong Kim, Vladimir Dubrovskii

American Chemical Society (ACS)2018

Optimizing the yield of A-polar GaAs nanowires to achieve defect-free zinc blende structure and enhanced optical functionality

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Lucas Güniat, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Edoardo Markov, Mahdi Zamani, Lea Ghisalberti, Wonjong Kim, Sara Marti Sanchez, Vladimir Dubrovskii

2018

Bi-stability of contact angle and its role in tuning the morphology of self-assisted GaAs nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Lucas Güniat, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, Luca Francaviglia, Wonjong Kim, Vladimir Dubrovskii

We demonstrate the existence of two stable contact angles for the gallium droplet on top of self-assisted GaAs nanowires grown by MBE on patterned silicon substrates. Contact angle around 130 degrees fosters a continuous increase in the nanowire radius, wh ...

IEEE2018

Nanoporous silicon tubes: the role of geometry in nanostructure formation and application to light emitting diodes

Anna Fontcuberta i Morral, Jelena Vukajlovic Plestina, Francesca Amaduzzi, Heidi Andrea Potts, Luca Francaviglia

Obtaining light emission from silicon has been the holy grail of optoelectronics over the last few decades. One of the most common methods for obtaining light emission from silicon is to reduce it to a nanoscale structure, for example by producing porous s ...

Institute of Physics2017

Engineering the Size Distributions of Ordered GaAs Nanowires on Silicon

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jelena Vukajlovic Plestina, Martin George Friedl, Heidi Andrea Potts, Maxime Lagier, Wonjong Kim

Reproducible integration of III-V semiconductors on silicon can open new path toward CMOS compatible optoelectronics and novel design schemes in next generation solar cells. Ordered arrays of nanowires could accomplish this task, provided they are obtained ...

2017

Tilting Catalyst-Free InAs Nanowires by 3D-Twinning and Unusual Growth Directions

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Martin George Friedl, Heidi Andrea Potts, Youri Louis Winandus Van Hees

Controlling the growth direction of nanowires is of strategic importance both for applications where nanowire arrays are contacted in parallel and for the formation of more complex nanowire networks. We report on the existence of tilted InAs nanowires on ( ...

American Chemical Society2017

Tuning growth direction of catalyst-free InAs(Sb) nanowires with indium droplets

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Heidi Andrea Potts, Nicholas Paul Morgan

The need for indium droplets to initiate self-catalyzed growth of InAs nanowires has been highly debated in the last few years. Here, we report on the use of indium droplets to tune the growth direction of self-catalyzed InAs nanowires. The indium droplets ...

Institute of Physics2017

Gold-free Growth of InAs Nanowires : Growth, Structural & Electrical Properties

Heidi Andrea Potts

Semiconductor nanowires are interesting building blocks for a variety of electronic and optoelectronic applications, and they provide an excellent platformto probe fundamental physical effects. For the realization of nanowire based devices, a deep understa ...

EPFL2017

Synthesis, Morphological, and Electro-optical Characterizations of Metal/Semiconductor Nanowire Heterostructures

Anna Fontcuberta i Morral, Sonia Conesa Boj, Heidi Andrea Potts

In this letter, we demonstrate the formation of unique Ga/GaAs/Si nanowire heterostructures, which were successfully implemented in nanoscale light-emitting devices with visible room temperature electroluminescence. Based on our recent approach for the int ...

American Chemical Society2016

From Twinning to Pure Zincblende Catalyst-Free InAs(Sb) Nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Esther Alarcon Llado, Federico Matteini, Francesca Amaduzzi, Martin George Friedl, Heidi Andrea Potts

III-V nanowires are candidate building blocks for next generation electronic and optoelectronic platforms. Low bandgap semiconductors such as In As and InSb are interesting because of their high electron mobility. Fine control of the structure, morphology, ...

American Chemical Society2016

Impact of the Ga Droplet Wetting, Morphology, and Pinholes on the Orientation of GaAs Nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Jean-Baptiste Leran, Federico Matteini, Jelena Vukajlovic Plestina, Heidi Andrea Potts, William Craig Carter, Dmitry Mikulik

Ga-catalyzed growth of GaAs nanowires on Si is a candidate process for achieving seamless III/V integration on IV. In this framework, the nature of silicon's surface oxide is known to have a strong influence on nanowire growth and orientation and therefore ...

American Chemical Society2016