10.1021/acs.nanolett.8b04805.s001 Ziying Wang Ziying Wang Leiqiang Chu Leiqiang Chu Linjun Li Linjun Li Ming Yang Ming Yang Junyong Wang Junyong Wang Goki Eda Goki Eda Kian Ping Loh Kian Ping Loh Modulating Charge Density Wave Order in a 1T-TaS<sub>2</sub>/Black Phosphorus Heterostructure American Chemical Society 2019 theory calculations show BP CDW orders CDW phase transition temperature charge transfer Coulomb blockade model domain walls CDW phase transition van der Waals heterostructure 180 K CDW phase conductance oscillations quantum dot arrays Scanning tunneling microscopy study 1 T-TaS 2 1 T-TaS 2 nanoflake Modulating Charge Density Wave Order electron states CDW stabilities 2 D heterostructure NC phase 4.5 K transport measurements tunnelling barriers Unusual gate-dependent conductance oscillations charge density wave 2019-04-01 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Modulating_Charge_Density_Wave_Order_in_a_1T-TaS_sub_2_sub_Black_Phosphorus_Heterostructure/7960823 Controllability of collective electron states has been a long-sought scientific and technological goal and promises development of new devices. Herein, we investigate the tuning of charge density wave (CDW) in 1T-TaS<sub>2</sub> via a two-dimensional (2D) van der Waals heterostructure of 1T-TaS<sub>2</sub>/BP. Unusual gate-dependent conductance oscillations were observed in 1T-TaS<sub>2</sub> nanoflake supported on BP in transport measurements. Scanning tunneling microscopy study shows that the nearly commensurate (NC) CDW phase survived to 4.5 K in this system, which is substantially lower than the NC to commensurate CDW phase transition temperature of 180 K. A Coulomb blockade model was invoked to explain the conductance oscillations, where the domain walls and domains in NC phase serve as series of quantum dot arrays and tunnelling barriers, respectively. Density functional theory calculations show that a range of interfacial interactions, including strain and charge transfer, influences the CDW stabilities. Our work sheds light on tuning CDW orders via 2D heterostructure stacking and provides new insights on the CDW phase transition and sliding mechanism.