Ultrafast quantum beats of anisotropic excitons in atomically thin ReS2

• DOI: 10.1038/s41467-017-02802-8
• Publication Date: 2018-01-18T12:28:50Z
• Authors: Sangwan Sim; Doeon Lee; Artur V. Trifonov; Taeyoung Kim; Soonyoung Cha; Ji Ho Sung; Sungjun Cho; Wooyoung Shim; Moon-Ho Jo; Hyunyong Choi
• Keywords: Quantum beats; Quantum superposition

Quantum beats, periodic oscillations arising from coherent superposition states, have enabled exploration of novel phenomena. Originating strong Coulomb interactions and reduced dielectric screening, two-dimensional transition metal dichalcogenides exhibit strongly bound excitons either in a single structure or hetero-counterpart; however, quantum coherence between is barely known to date. Here we observe exciton beats atomically thin ReS