对于神经形态计算的铁电切尔恩绝缘器件的选择性和准连续切换
Moyu Chen1, Yongqin Xie1, Bin Cheng2
1Institute of Brain-Inspired Intelligence, National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
Nature nanotechnology
|July 4, 2024
概括
研究人员在拓性切尔恩绝缘器设备中展示了新的铁电切换,用于噪声免疫神经形态计算. 这一突破使先进的拓量子计算应用成为可能.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子材料科学 量子材料科学
- 材料化学 材料化学
背景情况:
- 拓材料提供无散射运输和量子化的霍尔导电性,这对于容错计算至关重要.
- 从拓边缘状态开发实用设备仍然是一个重大挑战.
- 量子材料中的铁电切换在先进的计算范式中还没有得到充分的探索.
研究的目的:
- 在拓性切尔恩绝缘器件中演示选择性和准连续性铁电切换.
- 以展示使用这些设备进行无噪声神经形态计算的概念验证.
- 探索工程材料中铁电和拓状态的共存和相互作用.
主要方法:
- 铁电切恩绝缘装置的制造,通过将魔法角度扭曲的双层石墨烯与对齐的h-BN层封装在一起.
- 界面铁电和拓切尔恩绝缘状态的表征.
- 利用门电压脉冲在磁场下实现切尔恩绝缘状态之间的铁电切换.
主要成果:
- 观察到界面铁电和拓切尔恩绝缘状态的共存.
- 证明了依赖于平面内磁场的异型铁电性.
- 通过选择性切换实现了1,280个可区分的铁电状态,在任意水平之间进行确定性控制.
- 实现了一个抗噪声的卷积神经网络,使用量子化的霍尔电导水平作为权重.
结论:
- 该研究提出了一种可行的方法,用于拓切尔恩绝缘体中的铁电切换.
- 这项工作为开发拓量子神经形态计算提供了一个有前途的途径.
- 展示的设备功能为量子计算中的增强功能和性能铺平了道路.
相关概念视频
Types of Semiconductors
585
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
585
Non-ohmic Devices
1.1K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.1K
MOS Capacitor
759
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
759
MOSFET: Enhancement Mode
320
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
320
Biasing of FET
257
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
257
Biasing of Metal-Semiconductor Junctions
238
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
238


