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17 papers
Tunable Circular Photogalvanic and Photovoltaic Effect in 2D Tellurium with Different Chirality
Chang Niu, Shouyuan Huang, Neil Ghosh +5
Chirality arises from the asymmetry of matters, where two counterparts are the mirror image of each other. The interaction between circular-polarization light and quantum materials…
Predictions and Measurements of Thermal Conductivity of Ceramic Materials at High Temperature
Zherui Han, Zixin Xiong, William T. Riffe +8
The lattice thermal conductivity () of two ceramic materials, cerium dioxide (CeO) and magnesium oxide (MgO), is computed up to 1500 K using first principles and the phonon…
Inverse Design of Plasmonic Structures with FDTD
Zhou Zeng, Xianfan Xu
Inverse design has greatly expanded nanophotonic devices and brought optimized performance. However, the use of inverse design for plasmonic structures has been challenging due to…
Raman Response and Transport Properties of One-Dimensional van der Waals Tellurium Nanowires
Jing-Kai Qin, Pai-Ying Liao, Mengwei Si +15
Tellurium can form nanowires of helical atomic chains. Given their unique one-dimensional van der Waals structure, these nanowires are expected to show remarkably different physica…
Thermoelectric Performance of 2D Tellurium with Accumulation Contacts
Gang Qiu, Shouyuan Huang, Mauricio Segovia +5
Tellurium (Te) is an intrinsically p-type doped narrow bandgap semiconductor with excellent electrical conductivity and low thermal conductivity. Bulk trigonal Te has been theoreti…
Controlled Growth of a Large-Size 2D Selenium Nanosheet and Its Electronic and Optoelectronic Applications
Jingkai Qin, Gang Qiu, Jie Jian +9
Selenium has attracted intensive attention as a promising material candidate for future optoelectronic applications. However, selenium has a strong tendency to grow into nanowire f…
1D van der Waals Material Tellurium: Raman Spectroscopy under Strain and Magneto-transport
Yuchen Du, Gang Qiu, Yixiu Wang +4
Experimental demonstrations of 1D van der Waals material tellurium have been presented by Raman spectroscopy under strain and magneto-transport. Raman spectroscopy measurements hav…
Field-effect transistors made from solution-grown two-dimensional tellurene
Yixiu Wang, Gang Qiu, Ruoxing Wang +9
The reliable production of two-dimensional crystals is essential for the development of new technologies based on 2D materials. However, current synthesis methods suffer from a var…
Mid-Infrared Ultrafast Carrier Dynamics in Thin Film Black Phosphorus
Vasudevan Iyer, Peide Ye, Xianfan Xu
Black phosphorus is emerging as a promising semiconductor for electronic and optoelectronic applications. To study fundamental carrier properties, we performed ultrafast femtosecon…
Large Enhancement of Electronic Thermal Conductivity and Lorenz Number in Topological Insulator Bi2Te2Se Thin Films
Zhe Luo, Jifa Tian, Mithun Srinivasan +2
Topological insulators (TI) have attracted extensive research effort due to their insulating bulk states but conducting surface states. However, investigation and understanding of…
Auxetic Black Phosphorus: A 2D Material with Negative Poisson's Ratio
Yuchen Du, Jesse Maassen, Wangran Wu +3
The Poisson's ratio of a material characterizes its response to uniaxial strain. Materials normally possess a positive Poisson's ratio - they contract laterally when stretched, and…
Observation of Optical and Electrical In-plane Anisotropy in High-mobility Few-layer ZrTe5
Gang Qiu, Yuchen Du, Adam Charnas +7
Transition metal pentatelluride ZrTe5 is a versatile material in condensed-matter physics and has been intensively studied since the 1980s. The most fascinating feature of ZrTe5 is…
Towards High-Performance Two-Dimensional Black Phosphorus Optoelectronic Devices: the Role of Metal Contacts
Yexin Deng, Nathan J. Conrad, Zhe Luo +3
The metal contacts on 2D black phosphorus field-effect transistor and photodetectors are studied. The metal work functions can significantly impact the Schottky barrier at the meta…
Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus
Zhe Luo, Jesse Maassen, Yexin Deng +5
Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-…
Black Phosphorus-Monolayer MoS2 van der Waals Heterojunction P-N Diode
Yexin Deng, Zhe Luo, Nathan J. Conrad +7
Phosphorene, an elemental 2D material, which is the monolayer of black phosphorus, has been mechanically exfoliated recently. In its bulk form, black phosphorus shows high carrier…
Phosphorene: A New 2D Material with High Carrier Mobility
Han Liu, Adam T. Neal, Zhen Zhu +2
Preceding the current interest in layered materials for electronic applications, research in the 1960's found that black phosphorus combines high carrier mobility with a fundamenta…
Improved current saturation and shifted switching threshold voltage in In2O3 nanowire based, fully transparent NMOS inverters via femtosecond laser annealing
Chunghun Lee, Sangphill Park, Pornsak Srisungsitthisunti +7
Transistors based on various types of non-silicon nanowires have shown great potential for a variety of applications, especially for those require transparency and low-temperature…