High-pressure amorphous nitrogen

被引:126
作者
Gregoryanz, E
Goncharov, AF
Hemley, RJ
Mao, HK
机构
[1] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA
[2] Carnegie Inst Washington, Ctr High Pressure Res, Washington, DC 20015 USA
来源
PHYSICAL REVIEW B | 2001年 / 64卷 / 05期
关键词
D O I
10.1103/PhysRevB.64.052103
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The phase diagram and stability limits of diatomic solid nitrogen have been explored in a wide pressure-temperature range by several optical spectroscopic techniques, A narrow-g-ap semiconducting phase eta has been found to exist in a range of 80-270 GPa and 10-510 K. The vibrational and optical properties of the eta phase produced under these conditions indicate that it is largely amorphous and back transforms. to a new molecular phase. The band gap of the eta phase is found to decrease with pressure indicating possible metallization by band overlap above 280 GPa.
引用
收藏
页数:4
相关论文
共 30 条
[1]   Melting and pressure-induced amorphization of quartz [J].
Badro, J ;
Gillet, P ;
Barrat, JL .
EUROPHYSICS LETTERS, 1998, 42 (06) :643-648
[2]   METASTABILITY OF ATOMIC PHASES OF NITROGEN [J].
BARBEE, TW .
PHYSICAL REVIEW B, 1993, 48 (13) :9327-9330
[3]   OBSERVATIONS OF SOLID H-2, D2 AND N-2 AT PRESSURES AROUND 1.5 MBAR AT 25-DEGREES-C [J].
BELL, PM ;
MAO, HK ;
HEMLEY, RJ .
PHYSICA B & C, 1986, 139 (1-3) :16-20
[4]  
BELL PM, 1986, PHYSICA C, V140
[5]   Infrared and Raman studies on high pressure phases of solid N2:: An intermediate structural modification between ε and δ phases [J].
Bini, R ;
Jordan, M ;
Ulivi, L ;
Jodl, HJ .
JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (16) :6849-6856
[6]   High-pressure phases of solid nitrogen by Raman and infrared spectroscopy [J].
Bini, R ;
Ulivi, L ;
Kreutz, J ;
Jodl, HJ .
JOURNAL OF CHEMICAL PHYSICS, 2000, 112 (19) :8522-8529
[7]  
BRODSKI MH, 1983, TOPICS APPL PHYSICS, V8
[8]   Semiconducting non-molecular nitrogen up to 240 GPa and its low-pressure stability [J].
Eremets, ML ;
Hemley, RJ ;
Mao, H ;
Gregoryanz, E .
NATURE, 2001, 411 (6834) :170-174
[9]  
FEI Y, 1966, MINERAL SPECTROSCOPY, P243
[10]   Optical evidence for a nonmolecular phase of nitrogen above 150 GPa [J].
Goncharov, AF ;
Gregoryanz, E ;
Mao, HK ;
Liu, ZX ;
Hemley, RJ .
PHYSICAL REVIEW LETTERS, 2000, 85 (06) :1262-1265