| Autor: |
Kaiyuan, Yao, Aiming, Yan, Salman, Kahn, Aslihan, Suslu, Yufeng, Liang, Edward S, Barnard, Sefaattin, Tongay, Alex, Zettl, Nicholas J, Borys, P James, Schuck |
| Rok vydání: |
2017 |
| Zdroj: |
Physical review letters. 119(8) |
| ISSN: |
1079-7114 |
| Popis: |
Optoelectronic excitations in monolayer MoS_{2} manifest from a hierarchy of electrically tunable, Coulombic free-carrier and excitonic many-body phenomena. Investigating the fundamental interactions underpinning these phenomena-critical to both many-body physics exploration and device applications-presents challenges, however, due to a complex balance of competing optoelectronic effects and interdependent properties. Here, optical detection of bound- and free-carrier photoexcitations is used to directly quantify carrier-induced changes of the quasiparticle band gap and exciton binding energies. The results explicitly disentangle the competing effects and highlight longstanding theoretical predictions of large carrier-induced band gap and exciton renormalization in two-dimensional semiconductors. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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