检索结果-南通市图书馆

Prediction of quantum anomalous Hall effect in CrI_(3)/ScCl_(2)bilayer heterostructure

Chinese Physics B 2022年第10期31卷 507-513页

作者：高源李慧平朱文光 International Center for Quantum Design of Functional Materials(ICQD) Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Department of Physics University of Science and Technology of ChinaHefei 230026China

Based on first-principles calculations,a two-dimensional(2D)van der Waals(vd W)bilayer heterostructure consisting of two topologically trivial ferromagnetic(FM)monolayers CrI_(3)and ScCl_(2)is proposed to realize the quantum anomalous Hall effect(QAHE)with a sizable topologically nontrivial band gap of 4.5 me *** topological nature is attributed to an interlayer band inversion between the monolayers and critically depends on the symmetry of the stacking *** further demonstrate that the topologically nontrivial band gap can be increased nearly linearly by the application of a perpendicular external pressure and reaches 8.1 me V at 2.7 GPa,and the application of an external out-of-plane electric field can also modulate the band gap and convert the system back to topologically trivial via eliminating the band *** effective model is developed to describe the topological phase evolution in this bilayer *** work provides a new candidate system based on 2D vd W materials for realization of potential high-temperature QAHE with considerable controllability.

关键词： quantum anomalous Hall effect two-dimensional heterostructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Giant Rashba-like spin-orbit splitting with distinct spin texture in two-dimensional heterostructures

引用

Chinese Physics B 2021年第8期30卷 485-491页

作者：朱健保秦维朱文光 Department of Physics University of Science and Technology of Chinaand Key Laboratory of Strongly-Coupled Quantum Matter PhysicsChinese Academy of SciencesHefei 230026China International Center for Quantum Design of Functional Materials(ICQD) Hefei National Laboratory for Physical Sciences at the Microscaleand Synergetic Innovation Center of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Based on first-principles density functional theory calculation,we discover a novel form of spin-orbit(SO)splitting in two-dimensional(2D)heterostructures composed of a single Bi(111)bilayer stacking with a 2D semiconducting In_(2)Se_(2) or a 2D ferroelectricα-In_(2)Se_(3) *** SO splitting has a Rashba-like but distinct spin texture in the valence band around the maximum,where the chirality of the spin texture reverses within the upper spin-split branch,in contrast to the conventional Rashba systems where the upper branch and lower branch have opposite chirality solely in the region below the band crossing *** ferroelectric nature ofα-In_(2)Se_(3) further enables the tuning of the spin texture upon the reversal of the electric polarization with the application of an external electric *** analysis based on a tight-binding model reveals that such SO splitting texture results from the interplay of complex orbital characters and substrate *** finding enriches the diversity of SO splitting systems and is also expected to promise for spintronic applications.

关键词： spin-orbit splitting two-dimensional heterostructure first-principles calculation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hexagonal boron phosphide and boron arsenide van der Waals heterostructure as high-efficiency solar cell

引用

Chinese Physics B 2022年第9期31卷 468-475页

作者：李依魏东郭高甫赵高唐亚楠戴宪起 School of Physics and Electronic Engineering Zhengzhou Normal UniversityZhengzhou 450044China School of Physics Henan Normal UniversityXinxiang 453007China

The rapid development of two-dimensional(2D)materials offers new opportunities for 2D ultra-thin excitonic solar cells(XSCs).The construction of van der Waals heterostructure(vdWH)is a recognised and effective method of integrating the properties of single-layer 2D materials,creating particularly superior ***,the prospects of h-BP/h-BAs vdW heterostructures in 2D excitonic solar cells are *** systematically investigate the electronic properties and optical properties of heterogeneous structures by using the density functional theory(DFT)and first-principles *** results indicate that the heterogeneous structure has good optoelectronic properties,such as a suitable direct bandgap and excellent optical absorption *** calculation of the phonon spectrum also confirms the well-defined kinetic stability of the *** design the heterogeneous structure as a model for solar cells,and calculate its solar cell power conversion efficiency which reaches up to 16.51%and is higher than the highest efficiency reported in organic solar cells(11.7%).Our work illustrates the potential of h-BP/h-BAs heterostructure as a candidate for high-efficiency 2D excitonic solar cells.

关键词： h-BP h-BAs two-dimensional heterostructure solar cell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Observation of ambipolar photoresponse from 2D MoS_(2)/MXene heterostructure

引用

Nano Research 2021年第10期14卷 3416-3422页

作者： Juntong Zhu Hao Wang Liang Ma Guifu Zou College of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Research Institute of Superconductor Electronics Nanjing UniversityNanjing 210023China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China

two-dimensional materials have been demonstrated as promising toolboxes for *** metal carbides and nitrides(MXenes),members of an emerging family of two-dimensional materials,have drawn extensive attention in optoelectronics owing to their excellent conductivity and tunable electronic ***,a photodetector based on the two-dimensional van der Waals heterostructure of Ti_(3)C_(2)T_(x)MXene and a MoS_(2)monolayer was constructed to observe the ambipolar photoresponse,which showed a positive photoresponse in the visible spectrum(500-700 nm)and a negative photoresponse at longer wavelengths(700-800 nm).The device exhibited a high negative responsivity of 1.9 A/W and a detectivity of 2.1×10^(10)Jones under 750 nm light *** experiments demonstrate that the negative photoresponse arises from the heterostructureinduced trap energy level,which confines the excited photoelectrons and leads to an inverse *** work demonstrates a unique optoelectronic phenomenon in MoS_(2)/MXene heterostructures and provides valuable insights into the development of new photodetection materials.

关键词： MXene MoS_(2) two-dimensional heterostructure photodetector ambipolar photoresponse

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Direct laser patterning of two-dimensional lateral transition metal disulfide-oxide-disulfide heterostructures for ultrasensitive sensors

引用

Nano Research 2020年第8期13卷 2035-2043页

作者： Bolun Wang Hao Luo Xuewen Wang Enze Wang Yufei Sun Yu-Chien Tsai Jinxuan Dong Peng Liu Huanglong Li Yong Xu Sefaattin Tongay Kaili Jiang Shoushan Fan Kai Liu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing100084China State Key Laboratory of Low-dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing100084China Department of Precision Instrument Center for Brain Inspired Computing ResearchTsinghua UniversityBeijing100084China RIKEN Center for Emergent Matter Science(CEMS) WakoSaitama351-0198Japan School for Engineering of Matter Transport and EnergyArizona State UniversityTempeAZ85287USA

two-dimensional(2D)heterostructures based on the combination of transition metal dichalcogenides(TMDs)and transition metal oxides(TMOs)have aroused growing attention due to their integrated merits of both components and multiple ***,nondestructive approaches of constructing TMD-TMO heterostructures are still very ***,we develop a novel type of lateral TMD-TMO heterostructure(NbS2-Nb2O5-NbS2)using a simple lithography-free,direct laser-patterning *** perfect contact of an ultrathin TMO channel(Nb2O5)with two metallic TMDs(NbS2)electrodes guarantee strong electrical signals in a two-terminal *** from sensing mechanisms in separate TMOs or TMDs,this sensor works based on the modulation of surface conduction of the ultrathin TMO(Nb2O5)channel through an adsorbed layer of water *** sensor thus exhibits high selectivity and ultrahigh sensitivity for room-temperature detection of NH3(ΔR/R=80%at 50 ppm),superior to the reported NH3 sensors based on 2D materials,and a positive temperature coefficient of resistance as high as 15%–20%/℃.Bending-invariant performance and high reliability are also demonstrated in flexible versions of *** work provides a new strategy of lithography-free processing of novel TMD-TMO heterostructures towards high-performance sensors,showing great potential in the applications of future portable and wearable electronics.

关键词： two-dimensional heterostructure niobium disulfide niobium oxide laser patterning sensor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：