InAs/(Al,Ga)Sb quantum well structures for magnetic sensors

Behet, M.; Das, Jaydip; Boeck, J. De; Borghs, Gustaaf

doi:10.1109/20.706528

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…The positive MR effect of a two-dimensional electron gas with high mobility in III-V-based semiconductor heterostructures has been investigated for sensors in automotive technology [1]. It has been reported that InAs/(Al,Ga)Sb quantum well structures used as active layers for magnetic-field sensing have shown excellent transport properties which resulted in high sensitivity for the operation at room temperature (RT) of both magetoresistors and Hall elements [2]. Spin-dependent transport phenomena in artificial structures, such as metallic multilayers, granular films and tunnel junctions, have also attracted much attention, raising scientific and technological issues [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistive switch effect in metal/semiconductor hybrid granular films: extremely huge magnetoresistance effect at room temperature

Akinaga¹

2002

Semicond. Sci. Technol.

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Hybrid granular films, consisting of nanoscale metal clusters that are grown on a GaAs substrate by molecular beam epitaxy, exhibit magnetic-field-sensitive current-voltage (I-V ) characteristics at room temperature. When a constant voltage, above the threshold value, is applied to the film, the I-V curve becomes nonlinear and a breeding-like current increase appears. The abrupt increase disappears with the application of magnetic fields, which we call the magnetoresistive switch. The switch yields the huge positive magnetoresistance effect, for example 320 000% at 2 kOe. The origin of the magnetoresistive switch effect is discussed in terms of a magnetic-field dependence of an avalanche breakdown.

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Section: Introductionmentioning

confidence: 99%

Magnetoresistive switch effect in metal/semiconductor hybrid granular films: extremely huge magnetoresistance effect at room temperature

Akinaga¹

2002

Semicond. Sci. Technol.

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“…Quantum sensor is a kind of microstructure sensor, which is designed by applying quantum effect. To classical faint signal, nowadays two kinds of quantum sensors, superconduction quantum interference device (SQUID) sensor [13,14] and quantum well Hall sensor [15,16], can be used in the quantum robot. SQUID sensor is extremely sensitive magnetic sensor that is based on the principles of superconductivity, the Meissner effect, flux quantisation and the Josephson effect.…”

Section: Information Acquisition Unitsmentioning

confidence: 99%

“…Since quantum robot applies quantum effect, it solves the difficulties resulting from micromation. Moreover, the performance of sensors can be improved through equipping quantum robot with quantum sensors [12][13][14][15][16], and the speed of robot learning and behavior decision can be increased using powerful parallel computing, fast searching ability and efficient learning of quantum algorithms.The organization of this paper is as follows. Section 2 presents a system structure of quantum robot and describes the functions of three fundamental parts including MQCU, quantum controller/actuator and information acquisition units.…”

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confidence: 99%

Quantum robot: structure, algorithms and applications

Dong¹,

Chen²,

Zhang³

et al. 2006

Robotica

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A kind of brand-new robot, quantum robot, is proposed through fusing quantum theory with robot technology. Quantum robot is essentially a complex quantum system and it is generally composed of three fundamental parts: MQCU (multi quantum computing units), quantum controller/actuator, and information acquisition units. Corresponding to the system structure, several learning control algorithms including quantum searching algorithm and quantum reinforcement learning are presented for quantum robot. The theoretic results show that quantum robot can reduce the complexity of O( 2 N ) in traditional robot to O( N N ) using quantum searching algorithm, and the simulation results demonstrate that quantum robot is also superior to traditional robot in efficient learning by novel quantum reinforcement learning algorithm.Considering the advantages of quantum robot, its some potential important applications are also analyzed and prospected. IntroductionThe naissance of robots and the establishment of robotics is one of the most important achievements in science and technology field in the 20 th century [1][2][3]. With the advancement of technology [4][5][6][7][8], robots are serving the community in many aspects, such as industry production, military affairs, national defence, medicinal treatment and sanitation, navigation and spaceflight, public security, and so on. Moreover, some new-type robots such as nanorobot, biorobot and medicinal robot also come to our world through fusing nanotechnology, biology and medicinal engineering into robot technology.As viewed from the development tide of robots, intelligentization and micromation are two important directions. The key of intelligentization lies in improving the performance of sensors and increasing the speed of learning and behavior decision, and ceaseless micromation will consequentially bring on the occurrence of quantum effect. So many difficulties must be solved from some new angles.On the other hand, as one of the most resplendent achievements in the 20 th century, quantum theory is more rapidly developing. Especially, many results of quantum information technology have shown that quantum computer can effectively increase efficiency for solving some important classical problems and it even can solve some hard problems that classical computer can't solve; quantum communication can realize high-precision secrecy communication and increase capacity of channel [9]. So manipulation of quantum systems and applications of quantum effect become a most important research point for many scientists. Here, we consider the fusion of quantum theory and robot technology, and use quantum system to construct a new-type robot-quantum robot. The conception of quantum robot has been presented from physics by Benioff in 1998 [10,11], where he emphasized the importance of quantum computer in quantum robot and the quantum robot isn't aware of its environment, doesn't make decisions, doesn't carry out experiments or make measurement. However, we give a structure of quantum robot from engineer...

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“…Despite the complexity, many hurdles have been overcome, and integrated Si Hall sensors form a large part of the market. GaAs, InGaAs and InAs [5,6], almost always used in the Hall geometry, have not yet appeared in integrated devices. Both materials enjoy substantially higher mobilities than Si [7], and this allows the fabrication of very small, low cost, simple, low-noise and sensitive sensors, often used as position sensors in brushless motors found in consumer electronics (disk drives, camcorders,...).…”

Section: Introductionmentioning

confidence: 99%

Compound Semiconductor Applications for Automotive Sensors

Pelczynski¹,

Heremans²,

Schwed

1999

MRS Proc.

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Compound semiconductors find extensive application as magnetic position sensors in the automotive environment. Typical applications involve the sensor element, a permanent magnet attached to the sensor, and a moving magnetic circuit -a target wheel. Wider mechanical gaps in the magnetic circuit can be utilized with a sensor of higher sensitivity, and thus high sensitivity is valuable. Further limitations on the choice of materials are imposed by temperature sensitivity, as the automotive environment is characterized by wide temperature operating ranges (-40°C up to 200°C). The magnetic signal may be hidden by the temperature drift in the sensor output, andthus temperature stability limits the sensor's resolution. Automotive position sensors find use in ignition timing and misfire detection (cam and crank sensors), as wheel speed sensors (anti-lock brakes and other types of active wheel-control), in brushless electric motors and several other applications. This work reviews progress achieved to refine the use of InSb for automotive sensing applications.

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InAs/(Al,Ga)Sb quantum well structures for magnetic sensors

Cited by 13 publications

References 5 publications

Magnetoresistive switch effect in metal/semiconductor hybrid granular films: extremely huge magnetoresistance effect at room temperature

Magnetoresistive switch effect in metal/semiconductor hybrid granular films: extremely huge magnetoresistance effect at room temperature

Quantum robot: structure, algorithms and applications

Compound Semiconductor Applications for Automotive Sensors

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