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228 results on '"Huang, Jinqiang"'

2. Probing the fractional quantum Hall phases in valley-layer locked bilayer MoS$_{2}$

Author

Zhao, Siwen, Huang, Jinqiang, Crépel, Valentin, Wu, Xingguang, Zhang, Tongyao, Wang, Hanwen, Han, Xiangyan, Li, Zhengyu, Xi, Chuanying, Pan, Senyang, Wang, Zhaosheng, Watanabe, Kenji, Taniguchi, Takashi, Sacépé, Benjamin, Zhang, Jing, Wang, Ning, Lu, Jianming, Regnault, Nicolas, and Han, Zheng Vitto

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Semiconducting transition-metal dichalcogenides (TMDs) exhibit high mobility, strong spin-orbit coupling, and large effective masses, which simultaneously leads to a rich wealth of Landau quantizations and inherently strong electronic interactions. However, in spite of their extensively explored Landau levels (LL) structure, probing electron correlations in the fractionally filled LL regime has not been possible due to the difficulty of reaching the quantum limit. Here, we report evidence for fractional quantum Hall (FQH) states at filling fractions 4/5 and 2/5 in the lowest LL of bilayer MoS$_{2}$, manifested in fractionally quantized transverse conductance plateaus accompanied by longitudinal resistance minima. We further show that the observed FQH states sensitively depend on the dielectric and gate screening of the Coulomb interactions. Our findings establish a new FQH experimental platform which are a scarce resource: an intrinsic semiconducting high mobility electron gas, whose electronic interactions in the FQH regime are in principle tunable by Coulomb-screening engineering, and as such, could be the missing link between atomically thin graphene and semiconducting quantum wells., Comment: 10 pages, 4 figures

Published
2023

46. Study on Growth Interface of Large Nd:YAG Crystals.

Author

Quan, Jiliang, Ke, Guanzhen, Zhang, Yali, Liu, Jian, and Huang, Jinqiang

Subjects
YTTRIUM aluminum garnet, CRYSTAL growth, SOLID-liquid interfaces, CRYSTALS, FORCED convection, ORTHOGONAL systems
Abstract

A study was performed on the growth interface of a large-diameter 1 at% neodymium-doped yttrium aluminum garnet (Nd:YAG) single crystal grown using the Czochralski method. Red parallel light and an orthogonal polarizing system were used to observe the distribution of the central and lateral cores of the crystal at different growth interfaces. The solid–liquid interface of large-diameter Nd:YAG crystal growth was mainly determined via the interaction between natural and forced convection. The shape of the solid–liquid interface was mainly controlled via maintaining the crystal rotation rate and the temperature field. Interface inversion generally occurred during the shoulder-expanding stage and late stages of the growth of the cylindrical portion of the crystal. The occurrence of interface inversion is directly related to the temperature field, process parameters, and diameter of the crystal. The growth shape of the crystal interface determined the size and distribution of the central and lateral cores of the crystal. The area of the central and lateral cores was reduced via adjusting the temperature gradient of the solid–liquid interface and crystal rotation speed. [ABSTRACT FROM AUTHOR]

Published
2023
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