1990
DOI: 10.1063/1.103503
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Double quantum well resonant tunnel diodes

Abstract: Double quantum well resonant tunnel diodes are demonstrated in InAlAs/InGaAs for the first time. Peak-to-valley ratios of greater than 70:1 at room temperature and 125:1 below 200 K are observed.

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Cited by 37 publications
(15 citation statements)
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“…In contrast, our devices consist of a single-tunnel barrier, so the device speed is not limited by the dwell time of the carriers in a central quantum well4041. Although the PVR of our proof-of-concept devices is significantly lower than that achieved in state-of-the-art III–V double barrier resonant tunnelling diodes4243, there are good prospects of achieving higher PVRs. In addition, as the barrier transmission coefficient is exponentially sensitive to the number of atomic layers in the hBN barrier13, it should be possible to achieve much higher peak resonant current densities in devices by using, for example, three-monolayer barriers.…”
Section: Discussionmentioning
confidence: 97%
“…In contrast, our devices consist of a single-tunnel barrier, so the device speed is not limited by the dwell time of the carriers in a central quantum well4041. Although the PVR of our proof-of-concept devices is significantly lower than that achieved in state-of-the-art III–V double barrier resonant tunnelling diodes4243, there are good prospects of achieving higher PVRs. In addition, as the barrier transmission coefficient is exponentially sensitive to the number of atomic layers in the hBN barrier13, it should be possible to achieve much higher peak resonant current densities in devices by using, for example, three-monolayer barriers.…”
Section: Discussionmentioning
confidence: 97%
“…Compared to a single layer of thickness 2 d 2 , the advantage increases as D increases from zero to about half a wavelength. The situation resembles double barrier tunnelling 14 with angle the energy analogue. For large d 2 , resonances occur at angles corresponding to propagating modes of the intermediate dielectric slab.…”
Section: Thin Active Layersmentioning
confidence: 99%
“…The distinctive feature that unity resonance can occur at two independent desired energy levels has been pointed out in Section 4. The transmission coefficient in the structures has also been derived in the analytical form (4) and the unity-resonance conditions are given by (12) and (13). The below-unity conditions have been investigated for two representative cases as shown in Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Yamamoto et al [4,5] derived the analytical expression for the transmission coefficient in symmetrical triple barriers. Theoretical studies have been carried out on the triple-barrier structures with different potential profiles [6 to 11], and experiments about resonant tunneling in triple-barrier structures have been also reported [12]. However, it seems that the novel feature of two resonance energy level selections in asymmetrical triple-barrier structures has not been reported yet.…”
Section: Introductionmentioning
confidence: 98%