The invention relates to the field of designing an integrated circuit, and in particular, to a graphene device.
Currently, the design of an integrated circuit is mostly a CMOS device based on a silicon semiconductor, whereas with the development of science and technology, a higher requirement is raised for the performance of the integrated circuit such as speed, and it is to develop a new material system with a higher carrier mobility and a new technical means to further extend the Moore Law and Beyond Si-CMOS and promote the development of the integrated circuit technology.
The graphene material receives an extensive attention because of its excellent physical properties, such as its high carrier mobility, high electrical conductivity and high thermal conductivity, etc., and is a kind of carbon-based material which people feel very optimistic about. Although the graphene material shows many excellent physical characteristics, how to design a device/circuit based on grapheme, such as the design of a multiplexer and a demultiplexer, is still a key point under research.
The problem to be resolved by the invention is to provide a graphene device, and to realize a design of a multiplexer/demultiplexer device base on grapheme.
To achieve the object above mentioned, an embodiment of the invention provides the following technical solution.
A graphene device comprising a plurality of graphene channels and at least one gate, wherein one end of each of the plurality of graphene channels is connected to one terminal, all the plurality of graphene channels are in contact with and electrically connected with the gate, and the angles between each of the plurality of graphene channels and the gate are different.
Optionally, the plurality of graphene channels are radially distributed from the terminal.
Optionally, the graphene device comprises one gate.
Optionally, the graphene device comprises a plurality of gates, and each of the plurality of gates are in contact and electrically connected with one or more different graphene channels, respectively.
Optionally, the graphene channels are single-layer graphene thin films.
Optionally, the terminal is an input end, and each of the other ends of the graphene channels is connected to different output ends, respectively.
Optionally, the terminal is an output end, and each of the other ends of the graphene channels is connected to different input ends, respectively.
As compared to the prior art, the above technical solution has the following advantages.
In the graphene device according to the embodiment of the invention, the graphene channels are in contact with and electrically connected with the gate, the angles between the graphene channels and the gate are mutually different, and thus, due to a different incident wave angle for a different graphene channel, each of the graphene channels has a different tunneling probability, each of the graphene channels has a different conduction condition, and the graphene device may be used as a device such as a multiplexer or a demultiplexer, etc.
The above and other objects, features and advantages of the invention will be clearer by illustration of the accompanying drawings. Throughout the drawings, like reference signs denote like parts. The drawings are not intentionally proportionately scaled and drawn according to the actual size, and the key point focuses on showing the gist of the invention.
In order to enable the above objects, features and advantages of the invention more apparent and easy to understand, the particular embodiments of the invention will be described in detail with respect to the accompanying drawings hereinafter.
In the following description many particular details are elucidated to facilitate a sufficient understanding of the invention, however, the invention may also be implemented in other ways than those described herein, those skilled in the art may make a similar generalization without departing from the connotation of the invention, and therefore the invention is not limited by the following disclosed particular embodiments.
With respect to
It is shown from a study that for a graphene material, when an electron passes through a barrier, its tunneling probability is related to the angle between an incident wave and the barrier, and the tunneling probability is 1, namely, 100% tunneling, only if the barrier height and the incident wave angle take certain values.
As shown in
In the graphene device of the invention, one end of a plurality of graphene channels is connected to one terminal, which is equivalent to the plurality of graphene channels being loaded with one barrier when the terminal has a potential; the graphene channels are in contact with and electrically connected with the gate and the angles between the graphene channels and the gate are mutually different, which is equivalent to the incident wave angles of different graphene channels being different. Thus, each of the graphene channels has a different tunneling probability, i.e., each of the graphene channels has a different conduction condition. When there is a potential at the connected one terminal, some channels are conductive and some are non-conductive due to different tunneling probabilities. Depending on the different angles when designed, the number of the conductive channels may be one or more. Therefore, the graphene device of the invention may be used as a multi-channel selective device, for example, a device such as a multiplexer or a demultiplexer, etc, the design of which is simple and the performance of which possesses such a feature as a high speed and a low power consumption due to a graphene material being adopted for design.
In the invention, the graphene channels are in contact with and electrically connected with the gate, namely, directly electrically connected with the gate. In an embodiment of the invention, the angle between the graphene channels and the gate, and the layout of the graphene channels and the gate, may be designed according to the requirements of a particular circuit. In some embodiments, as shown in
As shown in
As shown in
The above embodiments are applications of the graphene device of the invention, however, the invention is not limited thereto, and may also be applied in other data selection circuits.
What are described above are only preferred embodiments of the invention, and not intended to make any formal restrictions of the invention.
While the invention has been disclosed above in preferred embodiments, those embodiments are not used to define the invention. Any one skilled in the art may make many variations and modifications to the technical solution of the invention, or amend it into equivalent embodiments with equivalent changes using the approaches and technical content disclosed above, without departing from the scope of the technical solution of the invention. Therefore, all the content not departing from the technical solution of the invention, and any simple amendments, equivalent changes and modifications to the previous embodiments according to the technical essence of the invention, fall within the protective scope of the technical solution of the invention.
Number | Date | Country | Kind |
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201210050646.1 | Feb 2012 | CN | national |
This application is a National Phase application of, and claims priority to, PCT Application No. PCT/CN2012/000402, filed on Mar. 29, 2012, entitled “A graphene device”, which claimed priority to Chinese Application No. 201210050646.1, filed on Feb. 29, 2012. Both the PCT Application and Chinese Application are incorporated herein by reference in their entireties.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CN12/00402 | 3/29/2012 | WO | 00 | 9/3/2012 |