Studies of Dielectric Properties and Band Parameters of N-Pb1-xSnxTe by Magnetoplasma Waves

Autor:	K.L.I. Kobayashi, H. Kawamura, Shuzo Takano, Sadakichi Hotta, Kiichi Komatsubara, Yoshiki Kato
Rok vydání:	1974
Předmět:	Materials science Condensed matter physics Band gap Static dielectric constant Lattice (order) General Physics and Astronomy Dielectric Electronic band structure Free carrier Ferroelectricity Instability
Zdroj:	Journal of the Physical Society of Japan. 37:1007-1015
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.37.1007
Popis:	From magnetoplasma experiments at 50 GHz for n -Pb 1- x Sn x Te (0≤ x < 0.3), a static dielectric constant e s is determined as a function of x . For x =0, 0.063, 0.091, 0.152 and 0.293, e s is found to be 1410, 1770, 2840, 4610 and 10800 at 1.6 K, respectively. e s seems to depend on band gap as well as on carrier density. It is suggested that free carriers tend to stabilize the lattice instability and that the transition to the ferroelectric phase would be possible at around x =0.2 if the carrier density would be very small. It is further found that the band structure of alloys is essentially the same as that of PbTe at least up to x =0.3.
Databáze:	OpenAIRE
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