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3,516 results on '"Luo, Zhong"'

172. Entropic destruction of heavy quarkonium from a deformed $AdS_5$ model

Author

Zhang, Zi-qiang, Luo, Zhong-jie, Hou, De-fu, and Chen, Gang

Subjects
High Energy Physics - Phenomenology
Abstract

In this paper, we study the destruction of heavy quarkonium due to the entropic force in a deformed $AdS_5$ model. The effects of the deformation parameter on the inter-distance and the entropic force are investigated. The influence of the deformation parameter on the quarkonium dissociation is analyzed. It is shown that the inter-distance increases in the presence of the deformation parameter. In addition, the deformation parameter has the effect of decreasing the entropic force. This results imply that the quarkonium dissociates harder in a deformed AdS background than that in an usual AdS background, in agreement with earlier findings., Comment: 6 pages, 2 figures. Accepted by Advances in High Energy Physics

Published
2017
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184. Charge Density Wave and Superconductivity in BaSbTe2S Heterolayer Crystal with 2D Te Square Nets

Author

Luo, Zhong-Zhen, Zhao, Hengdi, Cai, Weizhao, Shahabfar, Shima, Li, Juncen, Cai, Songting, Berg, Jameson, Bhowmick, Tushar, Bao, Jin-Ke, Hao, Shiqiang, He, Yihui, Guo, Weiping, Chung, Duck Young, Yu, Yan, Sarker, Suchismita, Grayson, Matthew, Wolverton, Christopher, Dravid, Vinayak P., Cheng, Wendan, Zou, Zhigang, Rosenkranz, Stephan, Malliakas, Christos D., Deemyad, Shanti, and Kanatzidis, Mercouri G.

Abstract

Low-dimensional materials with charge density waves (CDW) are attractive for their potential to exhibit superconductivity and nontrivial topological electronic features. Here we report the two-dimensional (2D) chalcogenide, BaSbTe2S which acts as a new platform hosting these phenomena. The crystal structure of BaSbTe2S is composed of alternating atomically thin Te square-net layers and double rock-salt type [(SbTeS)2]2–slabs separated with Ba2+atoms. Due to the electronic instability of the Te square net, an incommensurately modulated structure is triggered and confirmed by both single-crystal X-ray diffraction, electron diffraction, and the presence of an energy bandgap in this compound. Our first-principles electronic structure analysis and investigation of structural dynamical instability suggest that the Te network plays a dominant role in its origin. The incommensurate structure is refined with a modulation vector of q= 0.351(1)b* using an orthorhombic cell of a= 4.4696(5) Å, b= 4.4680(5) Å, and c= 15.999(2) Å under superspace group Pmm2(0β0)000 at 293 K. The modulation vector qvaries as a function of both occupancy of Te in the square net and temperature, indicating the CDW order can be modulated by local distortions. The CDW can be suppressed by pressure, leading to the emergence of superconductivity with a Tcup to 7.5 K at 13.6 GPa, suggesting a competition between the CDW order and superconductivity. Furthermore, electrical transport under the magnetic field reveals the existence of compensated high mobility electron- and hole-bands near the Fermi surface (μ ∼600–3500 cm2V–1s–1), suggesting Dirac-like band dispersion.

Published
2025
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200. Gestational diabetes mellitus and linear growth in early childhood.

Author

Chen, Zi-Lin, Liu, Xin, Tao, Min-Yi, Yang, Meng-Nan, He, Hua, Fang, Fang, Wu, Ting, Ouyang, Fengxiu, Zhang, Jun, Li, Fei, and Luo, Zhong-Cheng

Subjects
DIABETES in children, PREGNANCY complications, GENERALIZED estimating equations, CHILDBIRTH, COHORT analysis
Abstract

Introduction: Gestational diabetes mellitus (GDM) is a common pregnancy complication with potential short- and long-term adverse consequences for both mothers and fetuses. It is unclear whether GDM affects linear growth in the offspring; research data are limited and inconsistent. Methods: In a prospective birth cohort in Shanghai (n=2055 children; 369 born to mothers with GDM). We sought to evaluate the impact of GDM on longitudinal linear growth in early childhood. Length/height was measured in children at birth, 6 weeks, 6 months, 1, 2 and 4 years of age. Multivariate linear regression and generalized estimating equation models were employed to assess the impact of GDM on length/height for age Z score (LAZ/HAZ). Results: Average birth length was similar in infants of GDM vs. euglycemic mothers. Adjusting for maternal and child characteristics, the children of mothers with GDM had consistently lower LAZ/HAZ compared to children of mothers without diabetes at ages 6 weeks, 6 months, 1, 2 and 4 years. GDM was associated with a 0.12 (95% confidence intervals 0.04-0.21) deficit in LAZ/HAZ in the growth trajectory from birth to age 4 years after adjusting for maternal and child characteristics. Discussion: GDM was associated with impaired longitudinal linear growth in early childhood. Further studies are warranted to understand the long-term impact on stature and health. [ABSTRACT FROM AUTHOR]

Published
2024
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