Moiré Potential Independent of Moiré Size Down to a Few Nanometers in Sliding Ferroelectrics DOI
Jian Liao, Xinyu Lv, Takashi Taniguchi

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Sliding ferroelectricity represents a way to realize atomically thin ferroelectric materials. Due the moiré pattern formed during stacking process, alternating domain network provides an attractive superlattice of electrostatic potential modulate electronic structures another material sitting on it. The relationship between magnitude and size, however, has been controversial in literature. In addition, how strong remains for sizes down 10 nm range is unclear. this study, we use contact-mode scanning tunneling microscopy with high spatial energy resolution show that independent size ranging from hundreds several nanometers. We also determined solely by specific materials used fabricate stack. This study important information sliding ferroelectrics can foster their application modulating other

Language: Английский

ac Stark Spectroscopy of Interactions between Moiré Excitons and Polarons DOI Creative Commons
Bertrand Evrard, Haydn S. Adlong, Antonia Ghita

et al.

Physical Review X, Journal Year: 2025, Volume and Issue: 15(2)

Published: April 1, 2025

We use nonlinear pump-probe spectroscopy to study optical excitations in a charge-tunable MoSe2/WS2 moiré heterostructure. An intense red-detuned laser pulse creates photonic dressing of the material by introducing large population excitons or exciton polarons deep potential. By measuring resulting ac Stark effect with weak resonant pulse, we gain access nature and mutual interactions elementary excitations. At charge neutrality, our measurements reveal that different resonances, associated confinement their center-of-mass motion potential, have significant spatial overlap. The short-range manifest themselves as density-dependent blueshift for same-valley bound biexciton states opposite-valley excitons. attractive polaron resonance appears upon injection electrons into heterostructure shows contrasting behavior: Here, observe an electron-density-independent light shift clear pump-power-dependent saturation. These features are equivalent ensemble independent two-level emitters indicate breakdown Fermi-polaron picture subject strong Our work establishes experimental approach elucidate semiconductor heterostructures, providing solid ground correlated electronic excitonic such materials. Published American Physical Society 2025

Language: Английский

Citations

0
Moiré Potential Independent of Moiré Size Down to a Few Nanometers in Sliding Ferroelectrics DOI
Jian Liao, Xinyu Lv, Takashi Taniguchi

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Sliding ferroelectricity represents a way to realize atomically thin ferroelectric materials. Due the moiré pattern formed during stacking process, alternating domain network provides an attractive superlattice of electrostatic potential modulate electronic structures another material sitting on it. The relationship between magnitude and size, however, has been controversial in literature. In addition, how strong remains for sizes down 10 nm range is unclear. this study, we use contact-mode scanning tunneling microscopy with high spatial energy resolution show that independent size ranging from hundreds several nanometers. We also determined solely by specific materials used fabricate stack. This study important information sliding ferroelectrics can foster their application modulating other

Language: Английский

Citations

0