Publications by Alberto Ciarrocchi

Excitonic devices with van der Waals heterostructures: valleytronics meets twistronics

Andras Kis, Fedele Tagarelli, Ahmet Avsar, Alberto Ciarrocchi

2D semiconducting transition metal dichalcogenides comprise an emerging class of materials with distinct properties, including large exciton binding energies that reach hundreds of millielectronvolts and valley-contrasting physics. Thanks to the van der Wa ...

2022

Excitonic transport driven by repulsive dipolar interaction in a van der Waals heterostructure

Andras Kis, Fedele Tagarelli, Alberto Ciarrocchi, Zhe Sun, Juan Francisco Gonzalez Marin

Nature Publishing Group2022

Probing magnetism in atomically thin semiconducting PtSe2

Andras Kis, Oleg Yazyev, Mukesh Kumar Tripathi, Ahmet Avsar, Michele Pizzochero, Alberto Ciarrocchi, Cheol Yeon Cheon

Atomic-scale disorder in two-dimensional transition metal dichalcogenides is often accompanied by local magnetic moments, which can conceivably induce long-range magnetic ordering into intrinsically non-magnetic materials. Here, we demonstrate the signatur ...

Nature Research2020

Electronic, excitonic and magnetic properties of two-dimensional heterostructures

Alberto Ciarrocchi

Two-dimensional (2D) crystals such as graphene or transition metal dichalcogenides (TMDCs) are a fascinating class of quantum materials. These compounds are obtained isolating the single atomic sheets that normally form bulk layered crystals, and the reduc ...

EPFL2020

Excitonic device and operating methods thereof

Andras Kis, Ahmet Avsar, Dmitrii Unuchek, Alberto Ciarrocchi

The present disclosure concerns an excitonic device including at least one heterostructure comprising or consisting solely of a first two-dimensional material or layer and a second two-dimensional material or layer. The at least one heterostructure being c ...

2019

Valley-polarized exciton currents in a van der Waals heterostructure

Andras Kis, Ahmet Avsar, Dmitrii Unuchek, Alberto Ciarrocchi, Zhe Sun

2019

Defect induced, layer-modulated magnetism in ultrathin metallic PtSe2

Andras Kis, Oleg Yazyev, Ahmet Avsar, Michele Pizzochero, Dmitrii Unuchek, Alberto Ciarrocchi

2019

Development of graphene-based ionizing radiation sensors

Davide Forti, Alberto Ciarrocchi, Giovanni Borghi

We present the first steps to develop radiation sensors based on the graphene field effect transistor technology. Such a sensor exploits the ambipolar behavior of graphene near its Dirac point and it is not dependent on collecting charges, but it senses io ...

ELSEVIER SCIENCE BV2019

Room-temperature electrical control of exciton flux in a van der Waals heterostructure

Andras Kis, Dmitrii Unuchek, Ahmet Avsar, Alberto Ciarrocchi

2018

Thickness-modulated metal-to-semiconductor transformation in a transition metal dichalcogenide

Andras Kis, Alberto Ciarrocchi, Dmitry Ovchinnikov, Ahmet Avsar

Nature Research2018