Wen Wan

ORCID: 0000-0002-9461-8148
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About
Contact & Profiles
Research Areas
  • 2D Materials and Applications
  • Graphene research and applications
  • MXene and MAX Phase Materials
  • Iron-based superconductors research
  • Topological Materials and Phenomena
  • Physics of Superconductivity and Magnetism
  • Metallurgical Processes and Thermodynamics
  • Quantum and electron transport phenomena
  • Organic and Molecular Conductors Research
  • Genetic Mapping and Diversity in Plants and Animals
  • Genetic and phenotypic traits in livestock
  • Metal and Thin Film Mechanics
  • Surface and Thin Film Phenomena
  • Microstructure and Mechanical Properties of Steels
  • Aluminum Alloy Microstructure Properties
  • Solidification and crystal growth phenomena
  • Nanowire Synthesis and Applications
  • Thermal properties of materials
  • Advanced Thermoelectric Materials and Devices
  • Cancer-related molecular mechanisms research
  • Advanced Photocatalysis Techniques
  • Fiber-reinforced polymer composites
  • Boron and Carbon Nanomaterials Research
  • Architecture, Modernity, and Design
  • Genetics and Plant Breeding

Donostia International Physics Center
2018-2025

Shanghai University
2024

Ningxia Academy of Agriculture and Forestry Sciences
2024

China National Petroleum Corporation (China)
2024

Xiamen University
2015-2019

Xiamen University of Technology
2015-2019

Material Physics Center
2019

First Affiliated Hospital of Kunming Medical University
2018

Kunming Medical University
2018

Jiujiang University
2018

How magnetism emerges in low-dimensional materials such as transition metal dichalcogenides at the monolayer limit is still an open question. Herein, we present a comprehensive study of magnetic properties single crystal and VSe$_{2}$, both experimentally \emph{ab initio}. Magnetometry, X-ray circular dichrosim (XMCD) initio} calculations demonstrate that charge density wave bulk stoichiometric VSe$_{2.0}$ causes structural distortion with strong reduction sates Fermi level, prompting system...

10.1021/acs.jpcc.9b08868 article EN The Journal of Physical Chemistry C 2019-10-22

High-yield and high-quality of milk are the primary goals dairy production. Understanding genetic architecture underlying these milk-related traits is beneficial so that variants can be targeted toward improvement. In this study, we measured five production quality in Holstein cattle population from China. These included yield, fat, protein. We used estimated breeding values as dependent variables to conduct genome-wide association studies (GWAS). Breeding were through pedigree relationships...

10.3390/ani10112048 article EN cc-by Animals 2020-11-05

Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting are largely exposed environment. In this regard, ineludible presence of supporting substrates triggers various proximity effects on that may ultimately compromise stability properties ground state. work, we investigate impact CDW superconducting...

10.1021/acsnano.1c06012 article EN cc-by-nc-nd ACS Nano 2021-11-30

In certain unconventional superconductors with sizable electronic correlations, the availability of closely competing pairing channels leads to characteristic soft collective fluctuations order parameters, which leave fingerprints in many observables and allow phase competition be scrutinized. Superconducting layered materials, where electron-electron interactions are enhanced decreasing thickness, promising candidates display these correlation effects. this work, existence a mode...

10.1002/adma.202206078 article EN cc-by-nc-nd Advanced Materials 2022-08-26

Abstract Kondo lattices are ideal testbeds for the exploration of heavy-fermion quantum phases matter. While our understanding has traditionally relied on complex bulk f -electron systems, transition metal dichalcogenide heterobilayers have recently emerged as simple, accessible and tunable 2D lattice platforms where, however, their ground state remains to be established. Here we present evidence a coherent in 1T/1H-TaSe 2 heterobilayer by means scanning tunneling microscopy/spectroscopy at...

10.1038/s41467-023-42803-4 article EN cc-by Nature Communications 2023-11-02

A triangular MoS<sub>2</sub> monolayer directly synthesized on CVD-G Pt reveals a strong correlation between each other.

10.1039/c5ra22768b article EN RSC Advances 2015-12-08

The realization of p-n homojunctions, which can be achieved via spatially controlled carrier-type modulation, remains a challenge for two-dimensional transition metal dichalcogenides. Here, we report an effective method to tune intrinsic n-type few-layer MoSe2 p-type through controlling precisely the ultraviolet-ozone treatment time, attributed surface charge transfer from underlying MoOx (x < 3). resulting hole mobility and concentration are ∼20.1 cm2 V-1 s-1 ∼1.9 × 1012 cm-2, respectively,...

10.1039/c9nr04212a article EN Nanoscale 2019-01-01

Abstract Chemical substitution is a promising route for the exploration of rich variety doping- and/or disorder-dependent collective phenomena in low-dimensional quantum materials. Here we show that transition metal dichalcogenide alloys are ideal platforms to this purpose. In particular, demonstrate emergence superconductivity otherwise metallic single-layer TaSe 2 by minute electron doping provided substitutional W atoms. We investigate temperature and magnetic field dependence...

10.1038/s41699-023-00401-4 article EN cc-by npj 2D Materials and Applications 2023-06-02

The interplay between substrate interactions and electron-phonon coupling in two-dimensional (2D) materials presents a significant challenge understanding controlling their electronic properties. Here, we present comparative study of the structural characteristics, phonon dynamics, bulk monolayer NbSe$_2$ on epitaxial bilayer graphene (BLG) using helium atom scattering (HAS). High-resolution diffraction reveals (9x9)0$^{\circ}$ superstructure within monolayer, commensurate with BLG lattice,...

10.48550/arxiv.2501.08140 preprint EN arXiv (Cornell University) 2025-01-14

The interplay between substrate interactions and electron–phonon coupling in two-dimensional (2D) materials presents a significant challenge understanding controlling their electronic properties. Here, we present comparative study of the structural characteristics, phonon dynamics, bulk monolayer NbSe2 on epitaxial bilayer graphene (BLG) using helium atom scattering (HAS). High-resolution diffraction reveals (9 × 9)0° superstructure within monolayer, commensurate with BLG lattice, while...

10.1021/acsnano.4c16399 article EN ACS Nano 2025-02-26

Two-dimensional transition metal dichalcogenides (TMDs) represent an ideal testbench for the search of materials by design, because their optoelectronic properties can be manipulated through surface engineering and molecular functionalization. However, impact molecules on intrinsic physical TMDs, such as superconductivity, remains largely unexplored. In this work, critical temperature (TC) large-area NbSe2 monolayers is manipulated, employing ultrathin adlayers. Spectroscopic evidence...

10.1021/acs.nanolett.0c03386 article EN Nano Letters 2020-12-04

Transition metal dichalcogenides offer unprecedented versatility to engineer 2D materials with tailored properties explore novel structural and electronic phase transitions. In this work, the atomic-scale evolution of ground state a monolayer Nb1-δ Moδ Se2 across entire alloy composition range (0 < δ 1) is investigated using low-temperature (300 mK) scanning tunneling microscopy spectroscopy (STM/STS). particular, atomic structure throughout semiconductor transition (monolayer NbSe2 MoSe2 )...

10.1002/adma.202200492 article EN cc-by-nc-nd Advanced Materials 2022-03-04

By means of spin-resolved density functional theory calculations using both atomic orbitals and plane-wave basis codes, we study the electronic magnetic ground state single-layer NbSe2. We find that, for all functionals considered, most stable solution in this two-dimensional (2D) superconductor is ferrimagnetic with a moment 1.09 μB at Nb atoms 0.05 Se pointing opposite direction. Our show that precludes development charge wave (CDW) order their coexistence limit, unless graphene considered...

10.1088/1361-648x/ac00da article EN Journal of Physics Condensed Matter 2021-05-13

The atomic structures and electronic properties of isolated Mo atoms in bilayer epitaxial graphene (BLEG) on 4H-SiC(0001) are investigated by low temperature scanning tunneling microscopy (LT-STM). LT-STM results reveal that dopants prefer to substitute C at α-sites preferentially locate between the bilayers. First-principles calculations confirm embedding single within BLEG is energetically favorable as compared monolayer graphene. calculated band show Mo-incorporated n-doped, each atom...

10.1021/nn4057929 article EN ACS Nano 2013-12-19

Other than the well‐known sulfurization of molybdate compound to synthesize molybdenum disulfide (MoS 2 ) layers, dynamic process in whole crystalline growth from nuclei triangular domains has been rarely experimentally explored. Here, a competing sulfur‐capture principle jointly with strict epitaxial mechanism is first proposed for initial topography evolution and final intrinsic highly oriented MoS Mo or S terminations on graphene (Gr) template. Additionally, potential distributions bare...

10.1002/smll.201603549 article EN Small 2017-02-02

Abstract High-yield and high-quality of milk are the primary goals dairy production. Understanding genetic architecture underlying these production traits is beneficial so that variants can be targeted toward improvement. In this study, we measured five in Holstein cattle population from China. These included yield, protein fat yields; percentage percentages. We used estimated breeding values as dependent variables to conduct genome-wide association studies (GWAS). Breeding were through...

10.1101/2020.06.17.158386 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2020-06-19

Rheumatic heart disease (RHD) is an autoimmune triggered by acute rheumatic fever (ARF). Matrix metalloproteinases (MMPs) play important role in the modulation of immune responses. The purpose this study was to evaluate association MMP1, 3, and 12 promoter polymorphisms with RHD a Han population Southern China since 3 genes are localized on same chromosome have combined effect. DNA samples were obtained from 90 adult patients control subjects. Polymorphisms MMP1 (rs1799750), MMP3...

10.1186/s12881-018-0538-4 article EN cc-by BMC Medical Genetics 2018-02-20

Two-dimensional (2D) MoS2 materials possess indirect-to-direct bandgap tunability, and have enjoyed wide applications in electronics optoelectronics. Most of investigators ubiquitously synthesized these by using the chemical vaporization deposition (CVD) method. Here we adopted MoO3 source to synthesize on 280-nm SiO2/Si substrates via molecular beam epitaxy (MBE). We obtained triangular nucleation, tens-of-micron domain, monolayer MoS2. This MBE technique can be applied synthesizing other...

10.1088/1742-6596/864/1/012037 article EN Journal of Physics Conference Series 2017-06-01

Monolayer molybdenum disulfide (MoS2), a member of layered transition metal dichalcogenides (TMDCs), possesses direct bandgap, high optical absorption, and prominent piezoelectricity, as well has enjoyed wide range applications in electronics optoelectronics. Most investigators have ubiquitously synthesized this material by using the chemical vaporization deposition method. Here we discovered self-limiting vapor epitaxy (SLVDE), which governs synthesis integrated centimeter-scale nearly...

10.1021/acs.jpcc.6b12785 article EN The Journal of Physical Chemistry C 2017-02-07

Abstract This study determines the effects of nickel (Ni) doping on composition, phase structure, chemical valence state, hardness, and toughness CrAlNiN coatings. coatings with various Ni contents (0.00 at%–27.71 at%) were deposited surfaces M2 tool steel monocrystalline silicon (Si) using unbalanced magnetron sputter ion plating. The results showed that possess a nanomultilayer maintaining face centered cubic crystal structure chromium aluminum nitride (CrAlN) in acts as toughening to ease...

10.1088/2053-1591/ab70dc article EN cc-by Materials Research Express 2020-01-29

10.1007/s11665-020-05149-2 article EN Journal of Materials Engineering and Performance 2020-09-30

The scalable synthesis of two-dimensional (2D) hexagonal boron nitride (h-BN) is great interest for its numerous applications in novel electronic devices. Highly-crystalline h-BN films, with single-crystal sizes up to hundreds microns, are demonstrated via a Ni foam assisted technique reported here the first time. nucleation density domains can be significantly reduced due high solubility, as well large specific surface area foam. crystalline structure found aligned with, and therefore...

10.1088/2053-1583/aab407 article EN 2D Materials 2018-03-05
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