Micah Haseman
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View article: Native Point Defects Controlling Piezoelectric Voltage in Strained ZnO Microwires
Native Point Defects Controlling Piezoelectric Voltage in Strained ZnO Microwires Open
Piezovoltages generated by ZnO nano/microwire bending and strain enable electronic biogenerators that harvest human body movement to power-implanted biomedical devices. Currently, low voltages generated by these biogenerators limit their u…
View article: Point defect distributions in ultrafast laser-induced periodic surface structures on β-Ga2O3
Point defect distributions in ultrafast laser-induced periodic surface structures on β-Ga2O3 Open
β-Ga2O3 has received widespread attention due to its ultrawide bandgap, which potentially permits applications in extreme conditions. Ultrafast laser irradiation of β-Ga2O3 provides a means for exploring the response of the material under …
View article: Lithium Spatial Distribution and Split-Off Electronic Bands at Nanoscale V<sub>2</sub>O<sub>5</sub>/LiPON Interfaces
Lithium Spatial Distribution and Split-Off Electronic Bands at Nanoscale V<sub>2</sub>O<sub>5</sub>/LiPON Interfaces Open
A combination of depth-resolved cathodoluminescence spectroscopy (DRCLS) and X-ray photoemission depth profiling (XPS) measured the pronounced changes in both the electronic density of states and lithium composition near the nanoscale LixV…
View article: Neutron irradiation induced defects in oxides and their impact on the oxide properties
Neutron irradiation induced defects in oxides and their impact on the oxide properties Open
Understanding the irradiation-induced defects in oxides is of interest for a wide range of applications. ZnO is an interesting oxide with mixed ionic and covalent bonding that contains a variety of point defect structures—making it an exce…
View article: Cathodoluminescence and x-ray photoelectron spectroscopy of ScN: Dopant, defects, and band structure
Cathodoluminescence and x-ray photoelectron spectroscopy of ScN: Dopant, defects, and band structure Open
We have studied the optical band and defect transitions of ScN, a group IIIB transition metal nitride semiconductor with electronic and optoelectronic applications. Recent works have focused on the degenerate nature of ScN by substitutiona…
View article: Deep level defects and cation sublattice disorder in ZnGeN2
Deep level defects and cation sublattice disorder in ZnGeN2 Open
III-nitrides have revolutionized lighting technology and power electronics. Expanding the nitride semiconductor family to include heterovalent ternary nitrides opens up new and exciting opportunities for device design that may help overcom…
View article: Study of trap levels in β-Ga2O3 by thermoluminescence spectroscopy
Study of trap levels in β-Ga2O3 by thermoluminescence spectroscopy Open
Electronic defects with shallow and deep levels in β-Ga2O3 single crystals were investigated by thermoluminescence (TL) spectroscopy. Undoped, Fe-doped, Sn-doped, and Mg-doped β-Ga2O3 single crystals grown by different methods were studied…
View article: Observation of Negative Magnetic Hysteresis Loop in ZnO Thin Films
Observation of Negative Magnetic Hysteresis Loop in ZnO Thin Films Open
We report on the observation of an unusual negative magnetic hysteresis loop in ZnO thin film codoped with cobalt and aluminum (Co-Al:ZnO), while other transition-metal-doped ZnO films, such as Cu-doped ZnO and Mn-doped ZnO, exhibit normal…
View article: Physical and optical properties of Ce:YAG nanophosphors and transparent ceramics and observation of novel luminescence phenomenon
Physical and optical properties of Ce:YAG nanophosphors and transparent ceramics and observation of novel luminescence phenomenon Open
Ce doped yttrium aluminum garnet (Ce:YAG) is an important photonic material that is used as a yellow phosphor for white light emitting diodes. In this work, the physical and optical properties of Ce:YAG nanophosphors are investigated and t…