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| 1 | Ultrafast optical response and ablation mechanisms of molybdenum disulfide under intense femtosecond laser irradiation显示文摘Numerous valuable studies on electron dynamics have focussed on the extraordinary properties of molybdenum disulfide(MoS_(2));however,most of them were confined to the level below the damage threshold.Here the electron dynamics of MoS_(2) under intense ultrafast laser irradiation was investigated by experiments and simulations.Two kinds of ablation mechanisms were revealed,which led to two distinct types of electron dynamics and final ablation morphology.At a higher fluence,the emergence of superheated liquid induced a dramatic change in the transient reflectivity and micro-honeycomb structures.At a lower fluence,the material was just removed by sublimation,and the ablation structure was relatively flat.X-ray photoelectron spectroscopic(XPS)measurements demonstrated that thermal decomposition only occurred at the higher fluence.Furthermore,a theoretical model was developed to deeply reveal the ultrafast dynamics of MoS_(2) ablation.The simulation results were in good agreement with the temporal and spatial reflectivity distribution obtained from the experiment.The electron and lattice temperature evolution was also obtained to prove the ablation mechanism.Our results revealed ultrafast dynamics of MoS_(2) above the damage threshold and are helpful for understanding the interaction mechanism between MoS_(2) and intense ultrafast lasers,as well as for MoS_(2) processing applications. | Changji Pan Lan Jiang Jingya Sun Qingsong Wang Feifei Wang Kai Wang Yongfeng Lu Yeliang Wang Liangti Qu Tianhong Cui | 2020 | Light(Science & Applications)2020，9，1： | 4 |
| 2 | Task scheduling and virtual machine allocation policy in cloud computing environment显示文摘Cloud computing represents a novel computing model in the contemporary technology world. In a cloud system, the computing power of virtual machines(VMs) and network status can greatly affect the completion time of data intensive tasks. However, most of the current resource allocation policies focus only on network conditions and physical hosts. And the computing power of VMs is largely ignored. This paper proposes a comprehensive resource allocation policy which consists of a data intensive task scheduling algorithm that takes account of computing power of VMs and a VM allocation policy that considers bandwidth between storage nodes and hosts. The VM allocation policy includes VM placement and VM migration algorithms. Related simulations show that the proposed algorithms can greatly reduce the task completion time and keep good load balance of physical hosts at the same time. | Xiong Fu Yeliang Cang | 2015 | Journal of Systems Engineering and Electronics2015，26，4： | 3 |
| 3 | Template-directed assembly of pentacene molecules on epitaxial graphene on Ru(0001)显示文摘 | Haitao Zhou Lizhi Zhang Jinhai Mao Geng Li Yi Zhang Yeliang Wang Shixuan Du Werner A. Hofer Hong-Jun Gao | 2013 | Nano Research2013，6，2： | 2 |
| 4 | Construction of bilayer PdSe2 on epitaxial graphene显示文摘Two-dimensional (2D) materials have received significant attention due totheir unique physical properties and potential applications in electronics andoptoelectronics. Recent studies have demonstrated that exfoliated PdSe2, alayered transition metal dichalcogenide (TMD), exhibits ambipolar field-effecttransistor (FET) behavior with notable performance and good air stability, andthus serves as an emerging candidate for 2D electronics. Here, we report thegrowth of bilayer PdSe2 on a graphene-SiC(0001) substrate by molecular beamepitaxy (MBE). A bandgap of 1.15±0.07 eV was revealed by scanning tunnelingspectroscopy (STS). Moreover, a bandgap shift of 0.2 eV was observed in PdSe2layers grown on monolayer graphene as compared to those grown on bilayergraphene. The realization of nanoscale electronic junctions with atomicallysharp boundaries in 2D PdSe2 implies the possibility of tuning its electronicor optoelectronic properties. In addition, on top of the PdSe2 bilayers, PdSe2nanoribbons and stacks of nanoribbons with a fixed orientation have beenfabricated. The bottom-up fabrication of low-dimensional PdSe2 structures isexpected to enable substantial exploration of its potential applications. | En Li Dongfei Wang Peng Fan Ruizi Zhang Yu-Yang Zhang Geng Li Jinhai Mao Yeliang Wang Xiao Lin Shixuan Du Hong-Jun Gao | 2018 | Nano Research2018，11，11： | 2 |
| 5 | Multi-oriented moiré superstructures of graphene on Ir(111): experimental observations and theoretical models显示文摘 | Lei Meng Rongting Wu Lizhi Zhang Linfei Li Shixuan Du Yeliang Wang H-J Gao | 2012 | Journal of Physics: Condensed Matter2012，，： | 1 |
| 6 | A New Methodology to Characterize Wettability Alteration in Network Modeling显示文摘 | Feng Qihong Dong Yeliang | 2012 | Petroleum Science and Technology2012，30，6： | 1 |
| 7 | Construction of 2D Atomic Crystals on Transition Metal Surfaces: Graphene, Silicene, and Hafnene显示文摘 | Yi Pan Lizhi Zhang Li Huang Linfei Li Lei Meng Min Gao Qing Huan Xiao Lin Yeliang Wang Shixuan Du Hans‐Joachim Freund Hong‐Jun Gao | 2014 | Small2014，，： | 1 |
| 8 | Preface to the Special Issue on Monoelemental 2D Semiconducting Materials and Their Applications显示文摘Atomically monolayer 2D material was predicted thermal dynamically unstable,until the ground-breakthrough reports of the isolation of graphene in 2004,which was shortly recognized by the Nobel Prize in 2010.Monoelemental graphene inherits the merits of simple stoichiometry and crystal structure,which offers the possibilities for basic physics scenarios demonstrations and a great deal of functional devices explorations. | Han Zhang Xiantao Jiang Yeliang Wang Krassimir Panajotov Shengli Zhang | 2020 | Journal of Semiconductors2020，41，8： | 1 |
| 9 | Shortest Paths in Traffic-light Networks显示文摘 | Chen Yeliang Yang Hsu-Hao | 2000 | Transportation Research2000，34，1： | 1 |
| 10 | Advance in two-dimensional twisted moirématerials:Fabrication,properties,and applications显示文摘Two-dimensional(2D)twisted moirématerials,a new class of van der Waals(vdW)layered heterostructures with different twist angles between neighboring layers,have attracted tremendous attention due to their rich emerging properties.In this review,we systematically summarize the recent progress of 2D twisted moirématerials.Firstly,we introduce several representative fabrication methods and the fascinating topographies of the twisted moirématerials.Specifically,we discuss various remarkable physical properties related to twisted angles,including flat bands,unconventional superconductivity,ferromagnetism,and ferroelectricity.We also analyze the potential applications in various twisted moirésystems.Finally,the challenges and future perspectives of the twisted moirématerials are discussed.This work would spur edge-cutting ideas and related achievements in the scientific and technological frontiers of 2D twisted moirématerials. | Han Yang Liwei Liu Huixia Yang Yu Zhang Xu Wu Yuan Huang Hong-Jun Gao Yeliang Wang | 2023 | Nano Research2023，16，2： | 1 |
| 11 | Raman spectra evidence for the covalent-like quasi-bonding between exfoliated MoS_(2) and Au films显示文摘Gold-enhanced mechanical exfoliation method attracts broad interests in recent years,which has been widely used for preparing large-area and high-quality 2D single crystals.Even many calculations predict that there is strong interaction between Au film and the exfoliated 2D crystals,direct experimental evidence is still lacking.Here,we perform Raman spectroscopy measurements for few layer MoS_(2) with and without Au film underneath.The main peaks of MoS_(2) on Au film show no obvious change at higher frequency,however,the breathing and shear modes at low-frequency are suppressed,especially for breathing modes.In contrast,both breathing modes and shear modes can be detected on suspended MoS_(2) and the samples are transferred from Au film to SiO_(2)/Si.These comparison results provide direct evidence for the existence of covalent-like quasi-bonding at the interface of Au film and the exfoliated MoS_(2)crystal.This MoS_(2)/Au interface interaction presents a special pinning-effect for low-frequency rigid vibration.Similar pinning-effect is also discovered in WS2/Au system.Our work reports the suppression of low-frequency Raman modes of MoS_(2),WS_(2) on Au film,which will deliver new inspiration for studying other interactions between layered materials and solid surfaces. | Xinyu HUANG Lei ZHANG Liwei LIU Yang QIN Qiang FU Qiong WU Rong YANG Jun-Peng LV Zhenhua NI Lei LIU Wei JI Yeliang WANG Xingjiang ZHOU Yuan HUANG | 2021 | Science China(Information Sciences)2021，64，4： | 1 |
| 12 | Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction显示文摘 | Yu He Xiqian Yu Geng Li Rui Wang Hong Li Yeliang Wang Hongjun Gao Xuejie Huang | 2012 | Journal of Power Sources2012，，： | 1 |
| 13 | Monolayer puckered pentagonal VTe_(2):An emergent two-dimensional ferromagnetic semiconductor with multiferroic coupling显示文摘Two-dimensional(2D)magnetic crystals have been extensively explored thanks to their potential applications in spintronics,valleytronics,and topological superconductivity.Here we report a novel monolayer magnet,namely puckered pentagonal VTe_(2)(PP-VTe_(2)),intriguing atomic and electronic structures of which were firmly validated from first-principles calculations.The PP-VTe_(2) exhibits strong intrinsic ferromagnetism and semiconducting property distinct from the half-metallic bulk pyrite VTe_(2)(BP-VTe_(2))phase.An unusual magnetic anisotropy with large magnetic exchange energies is found.More interestingly,the multiferroic coupling between its 2D ferroelasticity and in-plane magnetization is further identified in PP-VTe_(2),lending it unprecedented controllability with external strains and electric fields.Serving as an emergent 2D ferromagnetic semiconductor with a novel crystal structure,monolayer PP-VTe_(2) provides an ideal platform for exploring exotic crystalline and spin configurations in low-dimensional systems. | Xuanyi Li Zhili Zhu Qing Yang Zexian Cao Yeliang Wang Sheng Meng Jiatao Sun Hong-Jun Gao | 2022 | Nano Research2022，15，2： | 0 |
| 14 | Recent progress on fabrication and flat-band physics in 2D transition metal dichalcogenides moiré superlattices显示文摘Moiré superlattices are formed when overlaying two materials with a slight mismatch in twist angle or lattice constant. They provide a novel platform for the study of strong electronic correlations and non-trivial band topology, where emergent phenomena such as correlated insulating states, unconventional superconductivity, and quantum anomalous Hall effect are discovered. In this review, we focus on the semiconducting transition metal dichalcogenides(TMDs) based moiré systems that host intriguing flat-band physics. We first review the exfoliation methods of two-dimensional materials and the fabrication technique of their moiré structures. Secondly, we overview the progress of the optically excited moiré excitons, which render the main discovery in the early experiments on TMD moiré systems. We then introduce the formation mechanism of flat bands and their potential in the quantum simulation of the Hubbard model with tunable doping, degeneracies, and correlation strength. Finally, we briefly discuss the challenges and future perspectives of this field. | Xinyu Huang Xu Han Yunyun Dai Xiaolong Xu Jiahao Yan Mengting Huang Pengfei Ding Decheng Zhang Hui Chen Vijay Laxmi Xu Wu Liwei Liu Yeliang Wang Yang Xu Yuan Huang | 2023 | Journal of Semiconductors2023，44，1： | 0 |
| 15 | Intriguing one-dimensional electronic behavior in emerging two-dimensional materials显示文摘Tomonaga-Luttinger liquid(TLL),a peculiar one-dimensional(1D)electronic behavior due to strong correlation,was first studied in 1D nanostructures and has attracted significant attention over the last several decades.With the rise of new two-dimensional(2D)quantum materials,1D nanostructures in 2D materials have provided a new platform with a well-defined configuration at the atomic scale for studying TLL electronic behavior.In this paper,we review the recent progress of TLL electronic features in emerging 2D materials embedded with various 1D nanostructures,including island edges,domain walls,and 1D moirépatterns.Specifically,novel physical phenomena,such as 1D edge states in 2D transition metal dichalcogenides(TMDs),helical TLL in 2D topological insulators(2DTI),and chiral TLL in 2D quantum Hall systems,are described and discussed at the nanoscale.We also analyze challenges and opportunities at the frontier of this research area. | Xuan Song Teng Zhang Huixia Yang Hongyan Ji Jiatao Sun Liwei Liu Yeliang Wang Hongjun Gao | 2021 | Nano Research2021，14，11： | 0 |
| 16 | Colossal structural distortion and interlayer-coupling suppression in a van der Waals crystal induced by atomic vacancies显示文摘The interlayer coupling in van der Waals(vdW)crystals has substantial effects on the performance of materials.However,an indepth understanding of the microscopic mechanism on the defect-modulated interlayer coupling is often elusive,owing partly to the challenge of atomic-scale characterization.Here we report the native Se-vacancies in a charge-density-wave metal 2HNbSe2,as well as their influence on the local atomic configurations and interlayer coupling.Our low-temperature scanning tunneling microscopy(STM)measurements,complemented by density functional theory calculations,indicate that the Sevacancies in few-layer NbSe2 can generate obvious atomic distortions due to the Jahn-Teller effect,thus breaking the rotational symmetry on the nanoscale.Moreover,these vacancies can locally generate an in-gap state in single-layer NbSe2,and more importantly,lead to a colossal suppression of interlayer coupling in the bilayer system.Our results provide clear structural and electronic fingerprints around the vacancies in vdW crystals,paving the way for developing functional vdW devices. | Liangguang Jia Fei Gao Yu Zhang Yaoyao Chen Baofei Hou Zeping Huang Quanzhen Zhang Xu Wu Liwei Liu Shiwu Gao Mads Brandbyge Hong-Jun Gao Yeliang Wang | 2023 | Nano Research2023，16，4： | 0 |
| 17 | Deadline based scheduling for data-intensive applications in clouds显示文摘Cloud computing emerges as a new computing pattern that can provide elastic services for any users around the world. It provides good chances to solve large scale scientific problems with fewer efforts. Application deployment remains an important issue in clouds. Appropriate scheduling mechanisms can shorten the total completion time of an application and therefore improve the quality of service(QoS) for cloud users. Unlike current scheduling algorithms which mostly focus on single task allocation, we propose a deadline based scheduling approach for data-intensive applications in clouds. It does not simply consider the total completion time of an application as the sum of all its subtasks' completion time. Not only the computation capacity of virtual machine(VM) is considered, but also the communication delay and data access latencies are taken into account. Simulations show that our proposed approach has a decided advantage over the two other algorithms. | Fu Xiong Cang Yeliang Zhu Lipeng Hu Bin Deng Song Wang Dong | 2016 | The Journal of China Universities of Posts and Telecommunications2016，23，6： | 0 |
| 18 | Atomic tracking of thermally-driven structural evolution in 2D crystals:Case of NbSe_(2)显示文摘Advanced atomic tracking techniques play a critical role in characterizing structural evolution,elucidating fundamental mechanisms of exotic phenomena and tailoring delicate properties.Thermally driven structural modulation in 2D crystals,such as the charge density wave(CDW),often leads to intriguing quantum properties,making them a valuable platform for exploring fundamental physics and potential device applications.However,despite their significance,experimental studies addressing atomic tracking of thermally-driven structural evolution in 2D crystals have been limited.Herein,we utilize high-accuracy variable-temperature atomic tracking measurements with scanning tunneling microscopy(STM)to directly observe a series of structural transitions in a model 2D crystal,namely NbSe_(2).With the atomic tracking technique,we confirm the existence of the universal thermally-driven CDW transition hysteresis between the heating and cooling cycles.This transition hysteresis,characterized by a constant temperature offset,represents a new phenomenon of structural evolution.Our findings provide a feasible method to track CDW transitions at the atomic scale in 2D crystals,significantly contributing to a better understanding and the potential modulation of these materials'functions in nanodevices. | Baofei Hou Teng Zhang Tingting Wang Hongyan Ji Huixia Yang Liangguang Jia Xu Han Jingsi Qiao Yu Zhang Liwei Liu Hong-Jun Gao Yeliang Wang | 2024 | InfoMat2024，6，2： | 0 |
| 19 | Recent progress in 2D group-V elemental monolayers:fabrications and properties显示文摘A large number of two-dimensional(2D)monoelemental materials with huge application potentials have been developed,since graphene was reported as a monoelemental material with unique properties.As cousins of graphene,2D group-V elemental monolayers have gained tremendous interest due to their electronic properties with significant fundamental bandgap.In this review,we extensively summarize the latest theoretical and experimental progress in group-V monoelemental materials,including the latest fabrication methods,the properties and potential applications of these 2D monoelementals.We also give a perspective of the challenges and opportunities of 2D monoelemental group-V monolayer materials and related functional nanodevices. | Peiwen Yuan Teng Zhang Jiatao Sun Liwei Liu Yugui Yao Yeliang Wang | 2020 | Journal of Semiconductors2020，41，8： | 0 |
| 20 | Investigating molecular orbitals with submolecular precision on pristine sites and single atomic vacancies of monolayer h-BN显示文摘Understanding the influence of adsorption sites to the electronic properties of adsorbed molecules on two-dimensional(2D)ultrathin insulator is of essential importance for future organic-inorganic hybrid nanodevices.Here,the adsorption and electronic states of manganese phthalocyanine(MnPc)on a single layer of hexagonal boron nitride(h-BN)have been comprehensively studied by low-temperature scanning tunneling microscopy/spectroscopy and tight binding calculations.The frontier orbitals of the MnPc can change drastically by reversible manipulation of individual MnPc molecules onto and away from the single atomic vacancies at the h-BN surface.Particularly,the change of the molecular electronic configuration can be controlled depending on whether the atomic vacancy is below the metal center or the ligand of the MnPc.These findings give new insight into defect-engineering of the organic-inorganic hybrid nanodevices down to submolecular level. | Liwei Liu Thomas Dienel Gino Günzburger Teng Zhang Zeping Huang Cong Wang Roland Widmer Wei Ji Yeliang Wang Oliver Gröning | 2020 | Nano Research2020，13，8： | 0 |
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