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5 Jul 1999

Volume 75, Issue 1, pp. 1-147

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Observation of the impulse-like negative-differential resistance of superlatticed resonant-tunneling transistor

Shiou-Ying Cheng, Wen-Chau Liu, Wen-Lung Chang, Hsi-Jen Pan, Wei-Chou Wang, Jing-Yuh Chen, Shun-Ching Feng, and Kuo-Hui Yu

Appl. Phys. Lett. 75, 133 (1999); http://dx.doi.org/10.1063/1.124298 (3 pages) | Cited 2 times

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An AlInAs/GaInAs superlatticed resonant-tunneling transistor (SRTT) is fabricated and demonstrated. A five-period AlInAs/GaInAs superlattice is used to provide resonant tunneling (RT) and confinement of minority carriers. Experimentally, an interesting impulse-like multiple negative-differential-resistance (MNDR) phenomenon and transistor action are obtained for the studied SRTT device at room temperature. It is believed that the N-shaped MNDR results mainly from RT within the five-period AlInAs/GaInAs superlattice. © 1999 American Institute of Physics.
Show PACS
73.61.Ey III-V semiconductors
73.50.Gr Charge carriers: generation, recombination, lifetime, trapping, mean free paths
85.30.Tv Field effect devices
73.23.Hk Coulomb blockade; single-electron tunneling
85.30.Pq Bipolar transistors
73.21.-b Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems
73.40.Kp III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions

Low-temperature thermopower in nanostructured silver

X. F. Zhu, H. F. Zhang, J. S. Williams, R. P. Wang, L. D. Zhang, and X. J. Wu

Appl. Phys. Lett. 75, 136 (1999); http://dx.doi.org/10.1063/1.124299 (3 pages) | Cited 2 times

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The variation of thermopower with temperature from 77 to 300 K has been measured in samples of nanostructured silver. It is observed that a dramatic change occurs in the thermopower of the nanostructured silver as grain size is reduced into the nanoscale region. In particular, with the grain size decreasing to the nanometer scale, the slope of the electron-diffusion component of thermopower as a function of temperature increases and the phonon-drag component of thermopower is shifted to lower temperatures. The changes in the thermopower correlate well with changes in the microhardness. © 1999 American Institute of Physics.
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72.15.Jf Thermoelectric and thermomagnetic effects
71.38.-k Polarons and electron-phonon interactions

Fabrication of lateral single-electron tunneling structures by field-induced manipulation of Ag nanoclusters on a silicon surface

Kang-Ho Park, Mincheol Shin, Jeong Sook Ha, Wan Soo Yun, and Young-Jo Ko

Appl. Phys. Lett. 75, 139 (1999); http://dx.doi.org/10.1063/1.124326 (3 pages) | Cited 8 times

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Nanostructures composed of Ag clusters on an Sb-terminated Si surface were designed in a highly controlled manner and the electric conduction through Ag nanoclusters to the silicon substrate was investigated by using a scanning tunneling microscopy/spectroscopy. It was found that the lateral conduction between neighboring Ag clusters significantly contributed to the tunneling current–voltage characteristics, and the metallic single-electron tunneling structures employing the lateral conduction channels at room temperature can be fabricated via a field-induced manipulation of Ag clusters. © 1999 American Institute of Physics.
Show PACS
73.23.Hk Coulomb blockade; single-electron tunneling
73.61.At Metal and metallic alloys
73.40.Ns Metal-nonmetal contacts
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