Abstract:
Provided are an abrupt MIT device with variable MIT temperature or voltage, an MIT sensor using the abrupt MIT device, and an alarm apparatus and a secondary battery anti-explosion circuit including the MIT sensor. The MIT device includes an abrupt MIT layer undergoing an abrupt MIT at a transition temperature or a transition voltage and at least two electrode layers contacting the abrupt MIT layer. The transition temperature or the transition voltage varies with at least one of factors including a voltage applied to the electrode layers, a temperature, an electromagnetic wave, a pressure, and a gas concentration that affect the abrupt MIT layer. The MIT sensor is a temperature sensor, an infrared sensor, an image sensor, a pressure sensor, a gas-concentration sensor, or a switch. The alarm apparatus includes the MIT sensor and an alarm-signaling unit connected in series with the MIT sensor. The secondary battery anti-explosion circuit includes a secondary battery, the MIT sensor attached to the secondary battery to sense the temperature of the secondary battery and thus to prevent the possible explosion of the secondary battery, and a protection circuit body powered by the secondary battery.
Abstract:
Provided is continuous metal-insulator transition (MIT) material including a transition region in which resistance varies continuously from an insulator or a semiconductor to a metal by energy change between electrons.
Abstract:
Provided are an abrupt metal-insulator transition (MIT) device for bypassing super-high voltage noise to protect an electric and/or electronic system, such as, a high-voltage switch, from a super-high voltage, a high-voltage noise removing circuit for bypassing the super-high voltage noise using the abrupt MIT device, and an electric and/or electronic system including the high-voltage noise removing circuit. The abrupt MIT device includes a substrate, a first abrupt MIT structure, and a second abrupt MIT structure. The first and second abrupt MIT structures are formed on an upper surface and a lower surface, respectively, of the substrate. The high-voltage noise removing circuit includes an abrupt MIT device chain connected in parallel to the electric and/or electronic system to be protected. The abrupt MIT device chain includes at least two abrupt MIT devices serially connected to each other.
Abstract:
The generation of photocurrent in an ideal two-dimensional Dirac spectrum is symmetry forbidden. In sharp contrast, a three-dimensional Weyl semimetal can generically support significant photocurrent due to the combination of inversion symmetry breaking and finite tilts of the Weyl spectrum. To realize this photocurrent, a noncentrosymmetric Weyl semimetal is coupled to a pair of electrodes and illuminated with circularly polarized light without any voltage applied to the Weyl semimetal. The wavelength of the incident light can range over tens of microns and can be adjusted by doping the Weyl semimetal to change its chemical potential.
Abstract:
The proposed apparatus comprises correlated electron switches (455, 475) positioned between metallization layers (440) of an integrated circuit structure (400), wherein the correlated electron switches comprise one or more correlated electron materials of substantially different impedance characteristics, particularly in a three-dimensional memory array configuration.
Abstract:
Tunneling field effect transistors (TFETs) including a variable bandgap channel are described. In some embodiments, one or more bandgap characteristics of the variable bandgap channel may be dynamically altered by at least one of the application or withdrawal of a force, such as a voltage or electric field. In some embodiments the variable bandgap channel may be configured to modulate from an ON to an OFF state and vice versa in response to the application and/or withdrawal of a force. The variable bandgap channel may exhibit a bandgap that is smaller in the ON state than in the OFF state. As a result, the TFETs may exhibit one or more of relatively high on current, relatively low off current, and sub-threshold swing below 60 mV/decade.
Abstract:
Topological insulators, such as single-crystal Bi2Se3 nanowires, can be used as the conduction channel in high-performance transistors, a basic circuit building block. Such transistors exhibit current- voltage characteristics superior to semiconductor nanowire transistors, including sharp turn-on, nearly zero cutoff current, very large On/Off current ratio, and well-saturated output current. The metallic electron transport at the surface with good effective mobility can be effectively separated from the conduction of the bulk topological insulator and adjusted by field effect at a small gate voltage. Topological insulators such as Bi2Se3; also have a magneto-electric effect that causes transistor threshold voltage shifts with external magnetic field. These properties are desirable for numerous microelectronic and nanoelectronic circuitry applications, among other applications.
Abstract:
본 발명은 Hole-driven MIT 이론에 근거한 MIT 3 단자 소자인 t-switch의 구현과 t-switch의 응용인 ElectroStatic Discharge (ESD) 잡음 신호를 제거하는 기술을 보여준다. t-switch는 Inlet, Outlet, Control의 3단자로 구성되며 MIT(금속-절연체 전이, 불연속 점프)는 Control 단자에 흐르는 전류에 의해 Outlet 층에서 일어난다. t-switch는 Control 단자에 고저항이 연결되어 Inlet-Outlet으로 소자의 파괴없이 고전류 고전압의 ESD신호가 흐르도록 한다.