Descrizione del progetto
Controllare le interazioni degli eccitoni nei semicondutatori atomicamente sottili
I semiconduttori sottili come atomi sono materiali promettenti per i dispositivi fotonici su scala nanometrica. Le loro affascinanti proprietà sono in gran parte determinate dagli eccitoni, coppie elettrone-lacuna legate, che interagiscono con cariche elettriche, spin e fononi. Il progetto MaPWave, finanziato dal programma di azioni Marie Skłodowska-Curie, sintetizzerà i dicalcogenuri di metalli di transizione e sfrutterà le forti interazioni a molti-corpi (elettrone-lacuna) per generare condensati di eccitoni. Saranno utilizzati metodi avanzati di spettroscopia per studiare le interazioni elettrone-lacuna. Il controllo delle interazioni fondamentali nei semiconduttori potrebbe consentire la progettazione di dispositivi optoelettronici 2D con funzioni specifiche.
Obiettivo
Atomically thin semiconductors are emerging as an important class of quantum materials that provide groundbreaking functionalities in device architectures. In particular, tailoring quantum degrees of freedom associated with charge, spin and orbital quantum numbers, as well as twist angle, could enable novel electronic, spintronic, valleytronic and twistronic applications. These fascinating properties are all contained in the quantum mechanical wavefunctions associated with the charge carrying electrons and holes of the semiconductors. Here, I will prepare heterostructures of two-dimensional (2D) transition metal dichalcogenide semiconductors and use the strong many-body interactions in the materials to generate condensates of electron-hole pair excitations. The many-body wavefunctions of these so-called exciton condensates will be visualised for the first time using advanced photoemission spectroscopies that provide complementary access to the energy-, momentum-, time- and length-scales of the excitations. I hypothesise that this fundamental level of control of the underlying quantum mechanisms of the semiconductors will ultimately enable highly specific quantum engineering of 2D optoelectronic devices. I will combine my expertise on non-equilibrium femtosecond dynamics of 2D semiconductors with the capabilities of my host group at Aarhus University, Denmark, in order to gain access to multiple photoemission spectroscopy experiments with nanoscale spatial resolution and femtosecond time-resolution, as well as 2D material fabrication facilities. These new skills and networking opportunities will ultimately enable me to obtain a permanent academic position.
Campo scientifico
Programma(i)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Meccanismo di finanziamento
HORIZON-AG-UN - HORIZON Unit GrantCoordinatore
8000 Aarhus C
Danimarca