title: Gate-Optimized Thermoelectric Power Factor in Ultrathin WSe2 Single Crystals.
abstract: We report an electric field tuning of the thermopower in ultrathin WSe2 single crystals over a wide range of carrier concentration by using electric double-layer (EDL) technique. We succeeded in the optimization of power factor not only in the hole but also in the electron side, which has never been chemically accessed. The maximized values of power factor are one-order larger than that obtained by changing chemical composition, reflecting the clean nature of electrostatic doping.
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Masaro
authors: M
authors: Yoshida
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Takahiko
authors: T
authors: Iizuka
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Yu
authors: Y
authors: Saito
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Masaru
authors: M
authors: Onga
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Ryuji
authors: R
authors: Suzuki
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.
authors: Yijin
authors: Y
authors: Zhang
authors: Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, the University of Tokyo , Tokyo 113-8656, Japan.|RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan.
authors: Yoshihiro
authors: Y
authors: Iwasa
authors: RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan.
authors: Sunao
authors: S
authors: Shimizu
keywords: Thermopower; electric double-layer transistor (EDLT); on-chip thermometer; thermoelectric power factor; tungsten diselenide (WSe2)