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Nie JH, Xie T, Chen G, Zhang W, Fu YS. Moiré Enhanced Two-Band Superconductivity in a MnTe/NbSe 2 Heterojunction. Nano Lett 2023; 23:8370-8377. [PMID: 37656911 DOI: 10.1021/acs.nanolett.3c02772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
Recent advances in creating moiré periods of two-dimensional heterostructures enable diverse and compatible tunability to modulate the conventional proximity effect involving superconductivity, magnetism, and topology. Here, by constructing a MnTe/NbSe2 heterojunction via molecular beam epitaxy growth, we report on a moiré-enhanced multiband superconductivity by low-temperature scanning tunneling microscopy/spectroscopy measurements. We observe a distinct double-gap superconducting spectrum on monolayer MnTe that is absent on the NbSe2 substrate. The subgap character exhibits a moiré-related oscillation in real space, which can be well described by an effective two-band model. The restored two-gap feature and its rapid suppression under a small magnetic field are speculated to be mediated by the moiré superlattice, which is closely related to the enhanced interband coupling strength of quasiparticle scattering. Our work paves the way for engineering proximitized properties of heterostructures by a moiré landscape with spatial modulations.
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Affiliation(s)
- Jin-Hua Nie
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Tao Xie
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Gang Chen
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wenhao Zhang
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ying-Shuang Fu
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
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2
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Ding N, Yananose K, Rizza C, Fan FR, Dong S, Stroppa A. Magneto-optical Kerr Effect in Ferroelectric Antiferromagnetic Two-Dimensional Heterostructures. ACS Appl Mater Interfaces 2023; 15:22282-22290. [PMID: 37078781 DOI: 10.1021/acsami.3c02680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We studied the magneto-optical Kerr effect (MOKE) of two-dimensional (2D) heterostructure CrI3/In2Se3/CrI3 using density functional theory calculations and symmetry analysis. The spontaneous polarization in the In2Se3 ferroelectric layer and the antiferromagnetic ordering in CrI3 layers break the mirror and the time-reversal symmetry, thus activating MOKE. We show that the Kerr angle can be reversed by either the polarization or the antiferromagnetic order parameter. Our results suggest that ferroelectric and antiferromagnetic 2D heterostructures could be exploited for ultracompact information storage devices, where the information is encoded by the two ferroelectric or the two time-reversed antiferromagnetic states and the read-out is performed optically by MOKE.
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Affiliation(s)
- Ning Ding
- School of Physics, Southeast University, Nanjing, Jiangsu 21189, People's Republic of China
| | - Kunihiro Yananose
- Center for Theoretical Physics, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Carlo Rizza
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, I-67100 Coppito, L'Aquila, Italy
| | - Feng-Ren Fan
- Department of Physics and Guangdong-Hong Kong Joint Laboratory of Quantum Matter, The University of Hong Kong, Hong Kong, People's Republic of China
| | - Shuai Dong
- School of Physics, Southeast University, Nanjing, Jiangsu 21189, People's Republic of China
| | - Alessandro Stroppa
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, I-67100 Coppito, L'Aquila, Italy
- Consiglio Nazionale delle Ricerche, Institute for Superconducting and Innovative Materials and Devices (CNR-SPIN), University of L'Aquila, Via Vetoio, I-67100 Coppito, L'Aquila, Italy
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3
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Hou S, Xu C, Ju X, Jin Y. Interfacial Assembly of Ti 3 C 2 T x /ZnIn 2 S 4 Heterojunction for High-Performance Photodetectors. Adv Sci (Weinh) 2022; 9:e2204687. [PMID: 36285673 PMCID: PMC9762283 DOI: 10.1002/advs.202204687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Two-dimensional (2D) materials have emerged as prospective candidates for electronics and optoelectronics applications as they can be easily fabricated through liquid exfoliation and used to fabricate various structures by further subsequent processing methods in addition to their extraordinary and unique optoelectronic properties. Herein, the Ti3 C2 Tx /ZIS heterostructure with nanometer-thick Ti3 C2 Tx -MXene and ZnIn2 S4 (ZIS) films is fabricated by successive interfacial assembly of liquid exfoliated 2D MXene and ZnIn2 S4 nanoflakes. Benefiting from the superior light-harvesting capability and low dark current of ZnIn2 S4 , the limited absorbance, large scattering coefficient, and high dark current disadvantages of MXene are ameliorated. Meanwhile, the separation and transport of photogenerated carriers in ZnIn2 S4 are improved due to the excellent electrical conductivity of Ti3 C2 Tx nanoflakes. As a result, the as-prepared Ti3 C2 Tx /ZIS heterostructure photodetector has excellent optoelectronic characteristics in terms of a high responsivity of 1.04 mA W-1 , a large specific detectivity up to 1 × 1011 Jones, a huge on/off ratio at around 105 , and an ultralow dark current at ≈10-12 A. This work demonstrates a convenient method to construct heterostructured photodetectors by liquid exfoliated 2D nanoflakes, the as-fabricated Ti3 C2 Tx /ZIS heterostructured photodetectors show promising application potential for low-cost, reliable, and high-performance photodetectors.
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Affiliation(s)
- Shuping Hou
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China
- School of Applied Chemistry and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China
| | - Chen Xu
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China
- School of Applied Chemistry and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China
| | - Xingkai Ju
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China
- School of Applied Chemistry and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China
- School of Applied Chemistry and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China
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4
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Du M, Cui X, Zhang B, Sun Z. Deterministic Light-to-Voltage Conversion with a Tunable Two-Dimensional Diode. ACS Photonics 2022; 9:2825-2832. [PMID: 35996374 PMCID: PMC9389648 DOI: 10.1021/acsphotonics.2c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Heterojunctions accompanied by energy barriers are of significant importance in two-dimensional materials-based electronics and optoelectronics. They provide more functional device performance, compared with their counterparts with uniform channels. Multimodal optoelectronic devices could be accomplished by elaborately designing band diagrams and architectures of the two-dimensional junctions. Here, we demonstrate deterministic light-to-voltage conversion based on strong dielectric screening effect in a tunable two-dimensional Schottky diode based on semiconductor/metal heterostructure, where the resultant photovoltage is dependent on the intensity of light input but independent of gate voltage. The converted photovoltage across the diode is independent of gate voltage under both monochromatic laser and white light illumination. In addition, the Fermi level of two-dimensional semiconductor area on dielectric SiO2 is highly gate-dependent, leading to the tunable rectifying effect of this heterostructure, which corporates a vertical Schottky junction and a lateral homojunction. As a result, a constant open-circuit voltage of ∼0.44 V and a hybrid "photovoltaic + photoconduction" photoresponse behavior are observed under 1 μW illumination of 403 nm laser, in addition to an electrical rectification ratio up to nearly 104. The scanning photocurrent mappings under different bias voltages indicate that the switchable operation mode (photovoltaic, photoconduction, or hybrid) depends on the bias-dependent effective energy barrier at the two-dimensional semiconductor-metal interface. This approach provides a facile and reliable solution for deterministic on-chip light-to-voltage conversion and optical-to-electrical interconnects.
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Affiliation(s)
- Mingde Du
- Department
of Electronics and Nanoengineering, Aalto
University, Espoo FI-02150, Finland
- QTF
Centre of Excellence, Department of Applied Physics, Aalto University, Espoo FI-00076, Finland
| | - Xiaoqi Cui
- Department
of Electronics and Nanoengineering, Aalto
University, Espoo FI-02150, Finland
- QTF
Centre of Excellence, Department of Applied Physics, Aalto University, Espoo FI-00076, Finland
| | - Bin Zhang
- Department
of Electronics and Nanoengineering, Aalto
University, Espoo FI-02150, Finland
- Key
Laboratory of In-Fiber Integrated Optics of Ministry of Education,
College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
| | - Zhipei Sun
- Department
of Electronics and Nanoengineering, Aalto
University, Espoo FI-02150, Finland
- QTF
Centre of Excellence, Department of Applied Physics, Aalto University, Espoo FI-00076, Finland
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Huang J, Kang J. Two-dimensional graphyne-graphene heterostructure for all-carbon transistors. J Phys Condens Matter 2022; 34:165301. [PMID: 35108693 DOI: 10.1088/1361-648x/ac513b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
Semiconducting graphyne is a two-dimensional (2D) carbon allotrope with high mobility, which is promising for next generation all-carbon field effect transistors (FETs). In this work, the electronic properties of van der Waals heterostructure consists of 2D graphyne and graphene (GY/G) were studied from first-principles calculations. It is found that the band dispersion of isolated graphene and graphyne remain intact after they were stacked together. Due to the charge transfer from graphene to graphyne, the Fermi level of the GY/G heterostructure crosses the VB of graphene and the CB of graphyne. As a result, n-type Ohmic contact with zero Schottky barrier height (SBH) is obtained in GY/G based FETs. Moreover, the electron tunneling from graphene to graphyne is found to be efficient. Therefore, excellent electron transport properties can be expected in GY/G based FETs. Lastly, it is demonstrated that the SBH in the GY/G heterostructure can be tune by applying a vertical external electric field or doping, and the transition from n-type to p-type contact can be realized. These results show that GY/G is potentially suitable for 2D FETs, and provide insights into the development of all-carbon electronic devices.
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Affiliation(s)
- Jing Huang
- Beijing Computational Science Research Center, 100193 Beijing, People's Republic of China
| | - Jun Kang
- Beijing Computational Science Research Center, 100193 Beijing, People's Republic of China
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Tasnim KJ, Alharbi SAR, Musa MRK, Lovell SH, Akridge ZA, Yu M. Insight into the stacking and the species-ordering dependences of interlayer bonding in SiC/GeC polar heterostructures. Nanotechnology 2022; 33:155706. [PMID: 34972095 DOI: 10.1088/1361-6528/ac475b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Two-dimensional (2D) polar materials experience an in-plane charge transfer between different elements due to their electron negativities. When they form vertical heterostructures, the electrostatic force triggered by such charge transfer plays an important role in the interlayer bonding beyond van der Waals (vdW) interaction. Our comprehensive first principle study on the structural stability of the 2D SiC/GeC hybrid bilayer heterostructure has found that the electrostatic interlayer interaction can induce theπ-πorbital hybridization between adjacent layers under different stacking and out-of-plane species ordering, with strong hybridization in the cases of Si-C and C-Ge species orderings but weak hybridization in the case of the C-C ordering. In particular, the attractive electrostatic interlayer interaction in the cases of Si-C and C-Ge species orderings mainly controls the equilibrium interlayer distance and the vdW interaction makes the system attain a lower binding energy. On the contrary, the vdW interaction mostly controls the equilibrium interlayer distance in the case of the C-C species ordering and the repulsive electrostatic interlayer force has less effect. Interesting finding is that the band structure of the SiC/GeC hybrid bilayer is sensitive to the layer-layer stacking and the out-of-plane species ordering. An indirect band gap of 2.76 eV (or 2.48 eV) was found under the AA stacking with Si-C ordering (or under the AB stacking with C-C ordering). While a direct band gap of 2.00-2.88 eV was found under other stacking and species orderings, demonstrating its band gap tunable feature. Furthermore, there is a charge redistribution in the interfacial region leading to a built-in electric field. Such field will separate the photo-generated charge carriers in different layers and is expected to reduce the probability of carrier recombination, and eventually give rise to the electron tunneling between layers.
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Affiliation(s)
- Kazi Jannatul Tasnim
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
| | - Safia Abdullah R Alharbi
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
| | - Md Rajib Khan Musa
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
| | - Simon Hosch Lovell
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
| | - Zachary Alexander Akridge
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
| | - Ming Yu
- Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States of America
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7
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Bláha M, Bouša M, Valeš V, Frank O, Kalbáč M. Two-Dimensional CVD-Graphene/Polyaniline Supercapacitors: Synthesis Strategy and Electrochemical Operation. ACS Appl Mater Interfaces 2021; 13:34686-34695. [PMID: 34270890 DOI: 10.1021/acsami.1c05054] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanocomposites of graphene materials and conducting polymers have been extensively studied as promising materials for electrodes of supercapacitors. Here, we present a graphene/polyaniline heterostructure consisting of a CVD-graphene and polyaniline monolayer and its electrochemical operation in a supercapacitor. The synthesis employs functionalization of graphene by p-phenylene sulfonic groups and oxidative polymerization of anilinium by ammonium persulfate under reaction conditions, providing no bulk polyaniline. Scanning electron microscopy, atomic force microscopy, and Raman spectroscopy showed the selective formation of polyaniline on the graphene. In situ Raman spectroelectrochemistry and cyclic voltammetry (both in a microdroplet setup) confirm the reversibility of polyaniline redox transitions and graphene electrochemical doping. After an increase within the initial 200 cycles due to the formation of benzoquinone-hydroquinone defects in polyaniline, the specific areal capacitance remained for 2400 cycles with ±1% retention at 21.2 μF cm-2, one order of magnitude higher than the capacitance of pristine graphene.
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Affiliation(s)
- Michal Bláha
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, CZ-182 23 Prague 8, Czech Republic
| | - Milan Bouša
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, CZ-182 23 Prague 8, Czech Republic
| | - Václav Valeš
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, CZ-182 23 Prague 8, Czech Republic
| | - Otakar Frank
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, CZ-182 23 Prague 8, Czech Republic
| | - Martin Kalbáč
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, CZ-182 23 Prague 8, Czech Republic
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Abstract
The interface between metals and semiconductors plays an essential role in two-dimensional electronic heterostructures, which has provided an alternative opportunity to realize next-generation electronic devices. Lattice-matched two-dimensional heterointerfaces have been achieved in polymorphic 2D transition-metal dichalcogenides MX2 with M = (W, Mo) and X = (Te, Se, S) through phase engineering; yet other transition-metal chalcogenides have been rarely reported. Here we show that a single layer of hexagonal Cu2Te crystal could be synthesized by one-step liquid-solid interface growth and exfoliation. Characterizations of atomically resolved scanning tunneling microscope reveal that the Cu2Te monolayer consists of two lattice-matched distinct phases, similar to the 1T and 1T' phases of MX2. The scanning tunneling spectra identify the coexistence of the metallic 1T and semiconducting 1T' phases within the chemically homogeneous Cu2Te crystals, as confirmed by density functional theory calculations. Moreover, the two phases could form nanoscale lattice-matched metal-semiconductor junctions with atomically sharp interfaces. These results suggest a promising potential for exploiting atomic-scale electronic devices in 2D materials.
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Affiliation(s)
- Jingqi Feng
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
| | - Huiying Gao
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
| | - Tian Li
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
| | - Xin Tan
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
| | - Peng Xu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People's Republic of China
| | - Menglei Li
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
| | - Lin He
- Department of Physics, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Donglin Ma
- Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China
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Wang X, Yin Y, Song M, Zhang H, Liu Z, Wu Y, Chen Y, Eginligil M, Zhang S, Liu J, Huang W. Solution-Processable 2D Polymer/Graphene Oxide Heterostructure for Intrinsic Low-Current Memory Device. ACS Appl Mater Interfaces 2020; 12:51729-51735. [PMID: 33161720 DOI: 10.1021/acsami.0c15840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Suppressing the operating current in resistive memory devices is an effective strategy to minimize their power consumption. Herein, we present an intrinsic low-current memory based on two-dimensional (2D) hybrid heterostructures consisting of partly reduced graphene oxide (p-rGO) and conjugated microporous polymer (CMP) with the merits of being solution-processed, large-scale, and well patterned. The device with the heterostructure of p-rGO/CMP sandwiched between highly reduced graphene oxide (h-rGO) and aluminum electrodes exhibited rewritable and nonvolatile memory behavior with an ultralow operating current (∼1 μA) and efficient power consumption (∼2.9 μW). Moreover, the on/off current ratio is over 103, and the retention time is up to 8 × 103 s, indicating the low misreading rate and high stability of data storage. So far, the value of power is about 10 times lower than those of the previous GO-based memories. The bilayer architecture provides a promising approach to construct intrinsic low-power resistive memory devices.
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Affiliation(s)
- Xiaojing Wang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Yuhang Yin
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Mengya Song
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Heshan Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Zhengdong Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Yueyue Wu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Yuanbo Chen
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Mustafa Eginligil
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Shiming Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Juqing Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, China
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Zhang K, Feng S, Wang J, Azcatl A, Lu N, Addou R, Wang N, Zhou C, Lerach J, Bojan V, Kim MJ, Chen LQ, Wallace RM, Terrones M, Zhu J, Robinson JA. Manganese Doping of Monolayer MoS2: The Substrate Is Critical. Nano Lett 2015; 15:6586-6591. [PMID: 26349430 DOI: 10.1021/acs.nanolett.5b02315] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Substitutional doping of transition metal dichalcogenides (TMDs) may provide routes to achieving tunable p-n junctions, bandgaps, chemical sensitivity, and magnetism in these materials. In this study, we demonstrate in situ doping of monolayer molybdenum disulfide (MoS2) with manganese (Mn) via vapor phase deposition techniques. Successful incorporation of Mn in MoS2 leads to modifications of the band structure as evidenced by photoluminescence and X-ray photoelectron spectroscopy, but this is heavily dependent on the choice of substrate. We show that inert substrates (i.e., graphene) permit the incorporation of several percent Mn in MoS2, while substrates with reactive surface terminations (i.e., SiO2 and sapphire) preclude Mn incorporation and merely lead to defective MoS2. The results presented here demonstrate that tailoring the substrate surface could be the most significant factor in substitutional doping of TMDs with non-TMD elements.
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Affiliation(s)
| | | | | | - Angelica Azcatl
- Department of Materials Science and Engineering, The University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Ning Lu
- Department of Materials Science and Engineering, The University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Rafik Addou
- Department of Materials Science and Engineering, The University of Texas at Dallas , Richardson, Texas 75080, United States
| | | | | | - Jordan Lerach
- Materials Characterization Laboratory, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Vincent Bojan
- Materials Characterization Laboratory, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Moon J Kim
- Department of Materials Science and Engineering, The University of Texas at Dallas , Richardson, Texas 75080, United States
| | | | - Robert M Wallace
- Department of Materials Science and Engineering, The University of Texas at Dallas , Richardson, Texas 75080, United States
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