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    • 2. 发明授权
    • Negative absolute conductance device and method
    • 负绝对电导装置及方法
    • US5459334A
    • 1995-10-17
    • US309214
    • 1994-09-20
    • Mitra DuttaMichael A. StroscioVladimir V. MitinRimvydas Mickevicius
    • Mitra DuttaMichael A. StroscioVladimir V. MitinRimvydas Mickevicius
    • H01L29/12H01L29/205H01L31/08
    • B82Y10/00H01L29/125
    • A quantum wire embedded in another material or a quantum wire which is free standing. Specifically, the quantum wire structure is fabricated such that a quantum well semiconductor material, for example Gallium Arsenide (GaAS), is embedded in a quantum barrier semiconductor material, for example Aluminum Arsenide (AlAs). Preferably, the entire quantum wire structure is engineered to form multiple subbands and is limited to a low dimensional quantum structure. The dimensions of the quantum wire structure are preferably around 150.times.250 .ANG.. This structure has a negative absolute conductance at a predetermined voltage and temperature. As a result of the resonant behavior of the density of states, the rates of electron scattering in the passive region (acoustic phonon and ionized impurity scattering as well as absorption of optical phonons) decrease dramatically as the electron kinetic energy increases.
    • 嵌入另一种材料中的量子线或自由站立的量子线。 具体地,量子线结构被制造成使量子阱半导体材料,例如砷化镓(GaAS)被嵌入量子势垒半导体材料,例如砷化铝(AlAs)中。 优选地,整个量子线结构被设计成形成多个子带并被限制于低维量子结构。 量子线结构的尺寸优选为150×250左右。 该结构在预定电压和温度下具有负的绝对电导。 作为状态密度的共振行为的结果,随着电子动能增加,被动区域中的电子散射速率(声学声子和离子化杂质散射以及光学声子的吸收)显着降低。