Structural, optical, and electrical properties of e-beam deposited metamaterials of granular CdSe thin films on glass substrates with a thin buffer layer of HfO2 dielectric

Study of resistive switching behavior in HfO2 nanocrystals synthesized via a low temperature hydrothermal method

“…Over the last two decades, with the development of integrated circuit, HfO 2 is employed as the high-k dielectric layer in the electronic devices [3][4][5]. In addition, HfO 2 -based thin film with ferroelectric performance is discovered, further suggesting its potential in ferroelectric random-access memory (FeRAM) [6][7][8][9][10][11][12][13]. Generally, HfO 2 has three different crystal structures including monoclinic, tetragonal, and orthorhombic phases, in which the monoclinic and tetragonal phases are centrosymmetric structures, while the orthorhombic phase is non-centrosymmetric structure [14,15].…”

The study of interface quality in HfO2/Si films probed by second harmonic generation

“…Among the potential candidates, HfO 2 becomes a leading material due to its superior high-k gate dielectric characteristics. It persists a relatively large band gap (>5 eV) [3], a high dielectric constant (∼25) [4], the good thermal and thermodynamic stability in contact with silicon [5]. Consequently, HfO 2 has been the focus of extensive research, especially for its application in high-k gate dielectrics as FETs [6,7].…”

“…where χ (2) interface and χ (3) are the second-order and third-order nonlinear susceptibility tensors, respectively. E 0 is the initial static built-in electric field while I ω is the intensity of the incident laser.…”

Flexible MWCNT/PVA/Mn Ferrite/AC Metacomposites with Tunable Negative Permittivity for Low-Frequency Reflectors and Optical Sensors

“…1−6 Before Veselago proposed the theoretical possibility of negative refraction, almost all previous investigations concentrated on the positive permittivity while giving the negative permittivity less attention. 7 Epsilon-negative materials have been shown to have a wide range of potential applications, including coil-free resonators, 8 novel capacitors with high permittivity, 9 negative capacitance field effect transistors, 10 and high-power microwave filters. 11 It has been shown that plasma, an established method of collectively exciting metal electrons in the visible or nearultraviolet region, can produce negative permittivity and the magnitude of negative permittivity is closely associated with their free carrier concentration.…”

“…These dielectric properties, determined by the permittivity, vary depending on the desired application and the material’s ability to respond to electric fields. − Before Veselago proposed the theoretical possibility of negative refraction, almost all previous investigations concentrated on the positive permittivity while giving the negative permittivity less attention . Epsilon-negative materials have been shown to have a wide range of potential applications, including coil-free resonators, novel capacitors with high permittivity, negative capacitance field effect transistors, and high-power microwave filters …”