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2 results on '"Hyunju Chang"'

1. Magnetism in the insulating parents of the high-Tc superconductors: well or ill understood?

Author

Mahanti, S.D., Kaplan, T.A., Hyunju Chang, and Harrison, J.F.

Subjects
Magnetism -- Research, Superconducting magnets -- Research, Physics
Abstract

An overview of previous theoretical research on magnetism in the insulating parents of high critical temperature superconductors was presented. The differences between results for covalent reduction of the ordered moment in antiferromagnetic CuO2 planes was analyzed. It was proposed that the covalency reduction in the ordered moment was very large, given the approximate validity of the 3-band model with standard parameter values.

Published
1993

2. Selective suppression of conductance in metallic carbon nanotubes

Author

Hye-Mi So, Kong, Ki-jeong Kong, Byoung-Kye Kim, Hyunju Chang, Dong-Won Park, Jeong-O. Lee, Beom Soo Kim, and Ju-Jin Kim

Subjects
Electrical conductivity -- Analysis, Electrophiles -- Structure, Electrophiles -- Electric properties, Nanotubes -- Electric properties, Atomic force microscopy -- Observations, Chemistry
Abstract

The electrical transport properties and AFM topography of single-walled carbon nanotube (SWNT) field-effect transistors (SWNT-FETs) are investigated that reacted with four electrophilic molecules, particularly, 4-bromobenzene diazonium tetrafluoroborate (4-BBDT), nitronium tetrafluoroborate (2,4,6-TPPT) and 1,3-benzodithiolylium tetrafluoroborate (1,3-BDYT). It is shown that the electrophilic molecules like 2,4,6- TPPT and 1,3-BDYT react with metallic SWNTs preferentially through noncovalent and covalent binding respectively.

Published
2007

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