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One of our targets is to explore new materials with exotic properties in both single crystal and monolayer forms by corresponding chemical vapor transport and chemical vapor deposition methods. The structure and properties of materials are characterized by sophisticated equipment such as TEM, STM, AFM. <<more>>
One of our targets is to explore new materials with exotic properties in both single crystal and monolayer forms by corresponding chemical vapor transport and chemical vapor deposition methods. The structure and properties of materials are characterized by sophisticated equipment such as TEM, STM, AFM. <<more>>
After the discovery of graphene, numerous van der Waals (vdW) layered materials have been explored for a decade, including insulators, topological insulators, semiconductors, Weyl semimetals, metals, and superconductors. Recently, the antiferro- and ferromagnetic orders have been observed in two-dimensional materials. This gives rise to great opportunities for the modulation of magnetic properties via strain, surface doping as well as electrical gate insulators. <<more>>
After the discovery of graphene, numerous van der Waals (vdW) layered materials have been explored for a decade, including insulators, topological insulators, semiconductors, Weyl semimetals, metals, and superconductors. Recently, the antiferro- and ferromagnetic orders have been observed in two-dimensional materials. This gives rise to great opportunities for the modulation of magnetic properties via strain, surface doping as well as electrical gate insulators. <<more>>
High-Tc Superconductivity
High-Tc Superconductivity
It has been more than 100 years since the discovery of the first superconductivity of Hg (1911) but the best Currie temperature at ambient pressure is approximately 140K. The dream of a room-temperature superconductor operating at ambient pressure is still far from the current reality. Our target is to search for novel classes of superconductors with Tc reaching room temperature. Two routes we are working on are to develop resonant valence bond (RVB) materials (e.g., doped Mott-insulators, doped valley-spin insulators) and to induce large electron-phonon couplings in materials of light elements (e.g., doped graphene up to states at M point, functionalized carbon materials).<<more>>
It has been more than 100 years since the discovery of the first superconductivity of Hg (1911) but the best Currie temperature at ambient pressure is approximately 140K. The dream of a room-temperature superconductor operating at ambient pressure is still far from the current reality. Our target is to search for novel classes of superconductors with Tc reaching room temperature. Two routes we are working on are to develop resonant valence bond (RVB) materials (e.g., doped Mott-insulators, doped valley-spin insulators) and to induce large electron-phonon couplings in materials of light elements (e.g., doped graphene up to states at M point, functionalized carbon materials).<<more>>
Quantum Emitters
Quantum Emitters
Single-electron source is one of the key components of quantum sensing, quantum communications as well as quantum information. Although the single-electron sources are well-developed in 3D materials (e.g., NV center in diamond, defect in SiC), the quantum emission efficiency of 3D materials is quite small due to the internal total reflection. In contrast to the 3D system, 2D single-electron emitters manifest a high radiative emission rate, capabilities of integration to cavities and photonic waveguides. Our target is to design magnetic dopants in 2D materials to realize single-electron emitters operating at room temperature in a controlled manner for visible and IR ranges <<more>>
Single-electron source is one of the key components of quantum sensing, quantum communications as well as quantum information. Although the single-electron sources are well-developed in 3D materials (e.g., NV center in diamond, defect in SiC), the quantum emission efficiency of 3D materials is quite small due to the internal total reflection. In contrast to the 3D system, 2D single-electron emitters manifest a high radiative emission rate, capabilities of integration to cavities and photonic waveguides. Our target is to design magnetic dopants in 2D materials to realize single-electron emitters operating at room temperature in a controlled manner for visible and IR ranges <<more>>
Density functional theory (DFT) becomes a standard method to investigate materials properties. In our group, we use different DFT codes to understand experimental measurements as well as to design or predict properties of materials. Well-known open-source codes such as Quantum Espresso, VASP, EPW, FLEUR, OPENMX are currently used in our lab. <<more>>
Density functional theory (DFT) becomes a standard method to investigate materials properties. In our group, we use different DFT codes to understand experimental measurements as well as to design or predict properties of materials. Well-known open-source codes such as Quantum Espresso, VASP, EPW, FLEUR, OPENMX are currently used in our lab. <<more>>
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