TY - JOUR
T1 - New metallic carbon crystal
AU - Itoh, Masahiro
AU - Kotani, Motoko
AU - Naito, Hisashi
AU - Sunada, Toshikazu
AU - Kawazoe, Yoshiyuki
AU - Adschiri, Tadafumi
PY - 2009/2/2
Y1 - 2009/2/2
N2 - Recently, mathematical analysis clarified that sp2 hybridized carbon should have a three-dimensional crystal structure (K4) which can be regarded as a twin of the sp3 diamond crystal. In this study, various physical properties of the K4 carbon crystal, especially for the electronic properties, were evaluated by first principles calculations. Although the K4 crystal is in a metastable state, a possible pressure induced structural phase transition from graphite to K4 was suggested. Twisted π states across the Fermi level result in metallic properties in a new carbon crystal.
AB - Recently, mathematical analysis clarified that sp2 hybridized carbon should have a three-dimensional crystal structure (K4) which can be regarded as a twin of the sp3 diamond crystal. In this study, various physical properties of the K4 carbon crystal, especially for the electronic properties, were evaluated by first principles calculations. Although the K4 crystal is in a metastable state, a possible pressure induced structural phase transition from graphite to K4 was suggested. Twisted π states across the Fermi level result in metallic properties in a new carbon crystal.
UR - http://www.scopus.com/inward/record.url?scp=60749104220&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=60749104220&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.102.055703
DO - 10.1103/PhysRevLett.102.055703
M3 - Article
AN - SCOPUS:60749104220
SN - 0031-9007
VL - 102
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 055703
ER -