Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Suzuki, Seiya
no journal, ,
Suzuki, Seiya; Nemoto, Yoshihiro*; Shiiki, Natsumi*; Nakayama, Yoshiko*; Takeguchi, Masaki*
no journal, ,
Suzuki, Seiya; Katsube, Daiki*; Yano, Masahiro; Tsuda, Yasutaka; Terasawa, Tomoo; Asaoka, Hidehito; Yuhara, Junji*; Yoshigoe, Akitaka
no journal, ,
no abstracts in English
Suzuki, Seiya; Terasawa, Tomoo; Katsube, Daiki*; Yano, Masahiro; Tsuda, Yasutaka; Yuhara, Junji*; Yoshigoe, Akitaka; Asaoka, Hidehito
no journal, ,
no abstracts in English
Terasawa, Tomoo; Suzuki, Seiya; Katsube, Daiki*; Yano, Masahiro; Tsuda, Yasutaka; Yoshigoe, Akitaka; Asaoka, Hidehito
no journal, ,
Germanene, a monolayer honeycomb lattice of Ge atoms, is theoretically predicted to have both a linear band dispersion and a band gap of 23.9 meV and is expected to be a next-generation semiconductor material. The purpose of the present study was to elucidate the growth mechanism of germanene by in situ Raman scattering spectroscopy in a vacuum chamber. The results suggest that Ge atoms crystallize as sp3Ge at around 300 degrees C, lose their crystalline structure at around 500 degrees C, and form a honeycomb lattice as germanene after the rapid cooling to room temperature.
Suzuki, Seiya; Katsube, Daiki*; Yano, Masahiro; Tsuda, Yasutaka; Terasawa, Tomoo; Asaoka, Hidehito; Yuhara, Junji*; Yoshigoe, Akitaka
no journal, ,
Germanene is a two-dimensional (2D) sheet of germanium (Ge) with a honeycomb lattice. Recent theoretical studies have predicted several interesting electronic properties of germanene, such as 2D topological insulators. However, unlike graphene, germanene is easily oxidized in air, making it difficult to realize electrical devices based on germanene. To overcome the drawback of the chemical stability of germanene, it is necessary to understand how germanene is oxidized. Therefore, we started to study germanene and discovered an interesting phenomenon: oxidized germanene can be restored to good quality germanene simply by heating it in ultra-high vacuum (UHV). X-ray photoelectron spectroscopy spectra and low energy electron diffraction patterns indicate that the oxidized germanene is fully recovered after heating at 500 degrees Celsius. The detailed mechanism of the recovery will be discussed in the presentation.
Suzuki, Seiya
no journal, ,
no abstracts in English