1
|
Hoa LT, Kubakaddi SS, Nguyen C, Hieu NN, Phuc HV. Quantum magneto-transport properties of monolayers MoSi$_2$N$_4$, WSi$_2$N$_4$, and MoSi$_2$As$_4$. J Phys Condens Matter 2023. [PMID: 37467755 DOI: 10.1088/1361-648x/ace8df] [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: 07/21/2023]
Abstract
We study the transport properties of monolayers MoSi$_2$N$_4$, WSi$_2$N$_4$, and MoSi$_2$As$_4$ in a perpendicular magnetic field. The Landau level (LL) band structures including spin and exchange field effects are derived and discussed using a low-energy effective model. We show that the LLs band structures of these materials are similar to those of phosphorene and transition-metal dichalcogenides rather than graphene or silicene. The combination between strong spin-orbit coupling and exchange fields reduces the degradation of the LLs, leading to new plateaus in the Hall conductivity and Hall resistivity and new peaks in the longitudinal conductivity and longitudinal resistivity. The effect of the exchange field, carrier density, and LLs band structure on the conductivities and resistivities have been investigated. At high temperatures, the steps in Hall conductivity and resistivity plateaus disappear and reduce to their corresponding classical forms.
Collapse
Affiliation(s)
- Le T Hoa
- Department of Physics, Hue University, 32 Le Loi, Hue City, 530000, VIET NAM
| | - Shrishail S Kubakaddi
- Department of Physics, KLE Technological University, Dharwad 580 003, Hubli, Karnataka, 580031, INDIA
| | - Chuong Nguyen
- Materials Science and Engineering, Dai hoc Ky thuat Le Quy Don, 236, Hoang Quoc Viet St., Viet Nam, Ha Noi, 100000, VIET NAM
| | - Nguyen N Hieu
- Duy Tan University, 3 Quang Trung, Da Nang, 550000, VIET NAM
| | - Huynh V Phuc
- Dong Thap University, 783 Pham Huu Lau, 6 Ward, Cao Lanh, Dong Thap, Cao Lanh, 870000, VIET NAM
| |
Collapse
|
2
|
Do TN, Idrees M, Binh NTT, Phuc HV, Hieu NN, Hoa LT, Amin B, Van H. Type-I band alignment of BX-ZnO (X = As, P) van der Waals heterostructures as high-efficiency water splitting photocatalysts: a first-principles study. RSC Adv 2020; 10:44545-44550. [PMID: 35517160 PMCID: PMC9058505 DOI: 10.1039/d0ra09701b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 11/20/2020] [Indexed: 01/06/2023] Open
Abstract
In this work, we perform first-principles calculations to examine the electronic, optical and photocatalytic properties of the BX–ZnO (X = As, P) heterostructures. The interlayer distance and binding energy of the most energetically favorable stacking configuration are 3.31 Å and −0.30 eV for the BAs–ZnO heterostructure and 3.30 Å and −0.25 eV for the BP–ZnO heterostructure. All the stacking patterns of the BX–ZnO heterostructures are proved to have thermal stability by performing AIMD simulations. The BAs–ZnO and BP–ZnO heterostructures are semiconductors with direct band gaps of 1.43 eV and 2.35 eV, respectively, and they exhibit type-I band alignment, which make them suitable for light emission applications with the ultra-fast recombination between electrons and holes. Both the BAs–ZnO and BP–ZnO heterostructures can exhibit a wider optical absorption range for visible-light owing to their reduced band gaps compared with the isolated BAs, BP and ZnO monolayers. The band alignment of both the BAs–ZnO and BP–ZnO heterostructures can straddle the water redox potential and they would have better performances owing to the direct band gap and the reduced band gap. All these findings demonstrate that the BX–ZnO heterostructures can be considered as potential photocatalysts for water splitting. In this work, we perform first-principles calculations to examine the electronic, optical and photocatalytic properties of the BX–ZnO (X = As, P) heterostructures.![]()
Collapse
Affiliation(s)
- Thi-Nga Do
- Laboratory of Magnetism and Magnetic Materials, Advanced Institute of Materials Science, Ton Duc Thang University Ho Chi Minh City Vietnam .,Faculty of Applied Sciences, Ton Duc Thang University Ho Chi Minh City Vietnam
| | - M Idrees
- Department of Physics, Hazara University Mansehra 21300 Pakistan
| | - Nguyen T T Binh
- Department of Fundamental Sciences, Quang Binh University Quang Binh Vietnam
| | - Huynh V Phuc
- Division of Theoretical Physics, Dong Thap University Cao Lanh 870000 Vietnam
| | - Nguyen N Hieu
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Le T Hoa
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Bin Amin
- Abbottabad University of Science and Technology Abbottabad 22010 Pakistan
| | - Hieu Van
- Department of Physics, University of Education, The University of Da Nang Da Nang Vietnam
| |
Collapse
|
3
|
Hoa LT, Phuc HV, Phuong LT. Electrical and thermal properties of strain- and electric field-induced topological crystalline insulators. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Hoa LT, Phong TC, Hoi BD. Impurity scattering effects on the validity of Fermi liquid theory in topological crystalline insulator SnTe (001) thin films. Phys Chem Chem Phys 2020; 22:13613-13621. [PMID: 32515759 DOI: 10.1039/d0cp02333g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We study the electronic heat capacity (EHC) and the Pauli spin paramagnetic susceptibility (PSPS) of topological crystalline insulator SnTe (001) thin film in the presence of dilute charged impurities in an effective Hamiltonian model for the low-energy regime such as impurity concentration and impurity scattering potential effects. To calculate the EHC and PSPS using the Boltzmann method, we first calculate the electronic density of states by means of the Green's function approach. Also, the impurity effects are considered with the aid of the T-matrix approximation. We demonstrate that the hybridization potential between the front and back surfaces in SnTe (001) thin films leads to the band gap opening and to the zero PSPS at low temperatures obeying the Fermi liquid theory. In particular, we demonstrate two scenarios including the possibilities of the same and different impurity doping. It is shown that in both cases the midgap states emerge, the cation-anion symmetry breaks down and the Fermi liquid theory loses its validity. Moreover, the critical scattering potential with respect to the hybridization potential is found for the validity limit of the Fermi liquid theory. Finally, the Schottky anomaly and the crossover in EHC and PSPS, respectively, are discussed. Our results have strong implications for applications based on SnTe (001) thin films.
Collapse
Affiliation(s)
- Le T Hoa
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam and Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam.
| | - Tran C Phong
- The Vietnam National Institute of Educational Science, Hanoi, Vietnam.
| | - Bui D Hoi
- Department of Physics, University of Education, Hue University, 34 Le Loi, Hue City, Vietnam.
| |
Collapse
|
5
|
Pham KD, Tan LV, Idrees M, Amin B, Hieu NN, Phuc HV, Hoa LT, Chuong NV. Electronic structures, and optical and photocatalytic properties of the BP–BSe van der Waals heterostructures. NEW J CHEM 2020. [DOI: 10.1039/d0nj03236k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The combination of two-dimensional materials in the form of van der Waals (vdW) heterostructures has been shown to be an effective method for designing electronic and optoelectronic equipment.
Collapse
Affiliation(s)
- Khang D. Pham
- Laboratory of Applied Physics
- Advanced Institute of Materials Science
- Ton Duc Thang University
- Ho Chi Minh City
- Vietnam
| | - Lam V. Tan
- NTT Hi-Tech Institute
- Nguyen Tat Thanh University
- Ho Chi Minh City
- Vietnam
| | - M. Idrees
- Department of Physics
- Hazara University
- Mansehra 21300
- Pakistan
| | - Bin Amin
- Department of Physics
- Abbottabad University of Science and Technology
- Abbottabad 22010
- Pakistan
| | - Nguyen N. Hieu
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Huynh V. Phuc
- Division of Theoretical Physics
- Dong Thap University
- Cao Lanh 870000
- Vietnam
| | - Le T. Hoa
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Nguyen V. Chuong
- Department of Materials Science and Engineering
- Le Quy Don Technical University
- Ha Noi
- Vietnam
| |
Collapse
|
6
|
Huong PT, Idrees M, Amin B, Hieu NN, Phuc HV, Hoa LT, Nguyen CV. Electronic structure, optoelectronic properties and enhanced photocatalytic response of GaN–GeC van der Waals heterostructures: a first principles study. RSC Adv 2020; 10:24127-24133. [PMID: 35517332 PMCID: PMC9055037 DOI: 10.1039/d0ra04145a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 06/12/2020] [Indexed: 01/10/2023] Open
Abstract
In this work, we systematically studied the electronic structure and optical characteristics of van der Waals (vdW) heterostructure composed of a single layer of GaN and GeC using first principles calculations. The GaN–GeC vdW heterostructure exhibits indirect band gap semiconductor properties and possesses type-II energy band arrangement, which will help the separation of photogenerated carriers and extend their lifetime. In addition, the band edge positions of the GaN–GeC heterostructure meet both the requirements of water oxidation and reduction energy, indicating that the photocatalysts have the potential for water decomposition. The GaN–GeC heterostructure shows obvious absorption peaks in the visible region, leading to the efficient use of solar energy. Tensile and compressive strains of up to 10% are also proposed. Tensile strain leads to an increase in the blue shift of optical absorption, whereas a red shift is observed in the case of the compressive strain. These fascinating characteristics make the GaN–GeC vdW heterostructure a highly effective photocatalyst for water splitting. In this work, we systematically studied the electronic structure and optical characteristics of van der Waals (vdW) heterostructure composed of a single layer of GaN and GeC using first principles calculations.![]()
Collapse
Affiliation(s)
- Pham T. Huong
- Division of Computational Mathematics and Engineering
- Institute for Computational Science
- Ton Duc Thang University
- Ho Chi Minh City
- Vietnam
| | - M. Idrees
- Department of Physics
- Hazara University
- Mansehra 21300
- Pakistan
| | - B. Amin
- Department of Physics
- Abbottabad University of Science and Technology
- Abbottabad 22010
- Pakistan
| | - Nguyen N. Hieu
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Huynh V. Phuc
- Division of Theoretical Physics
- Dong Thap University
- Cao Lanh 870000
- Vietnam
| | - Le T. Hoa
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Chuong V. Nguyen
- Department of Materials Science and Engineering
- Le Quy Don Technical University
- Ha Noi 100000
- Vietnam
| |
Collapse
|
7
|
Do TN, Idrees M, Amin B, Hieu NN, Phuc HV, Hieu NV, Hoa LT, Nguyen CV. Electronic and photocatalytic properties of two-dimensional boron phosphide/SiC van der Waals heterostructure with direct type-II band alignment: a first principles study. RSC Adv 2020; 10:32027-32033. [PMID: 35518182 PMCID: PMC9056599 DOI: 10.1039/d0ra05579d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 08/13/2020] [Indexed: 11/21/2022] Open
Abstract
Designing van der Waals (vdW) heterostructures of two-dimensional materials is an efficient way to realize amazing properties as well as opening opportunities for applications in solar energy conversion and nanoelectronic and optoelectronic devices. In this work, we investigate the electronic, optical, and photocatalytic properties of a boron phosphide–SiC (BP–SiC) vdW heterostructure using first-principles calculations. The relaxed configuration is obtained from the binding energies, inter-layer distance, and thermal stability. We show that the BP–SiC vdW heterostructure has a direct band gap with type-II band alignment, which separates the free electrons and holes at the interface. Furthermore, the calculated absorption spectra demonstrate that the optical properties of the BP–SiC heterostructure are enhanced compared with those of the constituent monolayers. The intensity of optical absorption can reach up to about 105 cm−1. The band edges of the BP–SiC heterostructure are located at energetically favourable positions, indicating that the BP–SiC heterostructure is able to split water under working conditions of pH = 0–3. Our theoretical results provide not only a fascinating insight into the essential properties of the BP–SiC vdW heterostructure, but also helpful information for the experimental design of new vdW heterostructures. We investigate the structural, electronic, optical and photocatalytic properties of boron phosphide and SiC monolayers and their corresponding van der Waals heterostructure by density functional theory.![]()
Collapse
Affiliation(s)
- Thi-Nga Do
- Laboratory of Magnetism and Magnetic Materials
- Advanced Institute of Materials Science
- Ton Duc Thang University
- Ho Chi Minh City
- VietNam
| | - M. Idrees
- Department of Physics
- Hazara University
- Mansehra 21300
- Pakistan
| | - Bin Amin
- Department of Physics
- Abbottabad University of Science and Technology
- Abbottabad 22010
- Pakistan
| | - Nguyen N. Hieu
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Huynh V. Phuc
- Division of Theoretical Physics
- Dong Thap University
- Cao Lanh 870000
- Vietnam
| | - Nguyen V. Hieu
- Department of Physics
- The University of Da Nang
- University of Science and Education
- Da Nang
- Vietnam
| | - Le T. Hoa
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Natural Sciences
| | - Chuong V. Nguyen
- Department of Materials Science and Engineering
- Le Quy Don Technical University
- Ha Noi
- Vietnam
| |
Collapse
|
8
|
Vien CV, Phue NC, Ha LD, Tuan LM, Van NT, Pao TC, Hoa LT, Phoung CT. Paragonimiasis in Sin Ho District, Lai Chau Province, Viet Nam. Southeast Asian J Trop Med Public Health 1998; 28 Suppl 1:46. [PMID: 9656347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Forty-four cases of pulmonary paragonimiasis, two also with evidence of cerebral infection, were found in Sin Ho District in Northern Viet Nam. There were 30 males and 14 females, 2-30 years of age. The diagnosis was made by sputum examination. Pet dogs and wild dogs in the area were also found infected and the people often eat roasted crabs.
Collapse
Affiliation(s)
- C V Vien
- National Institute for Clinical Research in Tropical Disease, Hai Ba Trung Hospital, Viet Nam
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Lesnau A, Hils J, Pohl G, Beyer G, Janka M, Hoa LT. [Antiviral activity of berberine salts]. Pharmazie 1990; 45:638-9. [PMID: 2080224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- A Lesnau
- Institut für Virologie und Epidemiologie im Zentralinstitut für Hygiene, Mikrobiologie und Epidemiologie der DDR, Berlin
| | | | | | | | | | | |
Collapse
|