Metal-insulator transition of NTD 70Ge: Ga in magnetic fields

Michio Watanabe, Kohei M Itoh, Youiti Ootuka, Eugene E. Haller

Research output: Contribution to journalArticle

Abstract

We have determined the temperature dependence of the electrical conductivity σ(N, B, T) of nominally uncompensated, neutron-transmutation-doped (NTD)70Ge:Ga samples in magnetic fields up to B = 8 T at low temperatures (T = 0.05-0.5 K) to investigate both the doping-induced metal-insulator transition (MIT), σ(N,B,0) ∞ (N - Nc)μ, and the magnetic-field-induced MIT, σ(N, B, 0) ∞ (Bc - B)μ + ′. Our experimental results show that μ = μ′ = 1.1 ± 0.1 in sufficiently large magnetic fields.

Original languageEnglish
Pages (from-to)1677-1678
Number of pages2
JournalPhysica B: Condensed Matter
Volume284-288
Issue numberPART II
Publication statusPublished - 2000

Fingerprint

Metal insulator transition
nuclear reactions
Neutrons
insulators
Magnetic fields
magnetic fields
metals
Doping (additives)
Temperature
temperature dependence
electrical resistivity

Keywords

  • Critical exponent
  • Metal-insulator transition
  • Neutron-transmutation doping
  • Semiconductor

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Watanabe, M., Itoh, K. M., Ootuka, Y., & Haller, E. E. (2000). Metal-insulator transition of NTD 70Ge: Ga in magnetic fields. Physica B: Condensed Matter, 284-288(PART II), 1677-1678.

Metal-insulator transition of NTD 70Ge : Ga in magnetic fields. / Watanabe, Michio; Itoh, Kohei M; Ootuka, Youiti; Haller, Eugene E.

In: Physica B: Condensed Matter, Vol. 284-288, No. PART II, 2000, p. 1677-1678.

Research output: Contribution to journalArticle

Watanabe, M, Itoh, KM, Ootuka, Y & Haller, EE 2000, 'Metal-insulator transition of NTD 70Ge: Ga in magnetic fields', Physica B: Condensed Matter, vol. 284-288, no. PART II, pp. 1677-1678.
Watanabe M, Itoh KM, Ootuka Y, Haller EE. Metal-insulator transition of NTD 70Ge: Ga in magnetic fields. Physica B: Condensed Matter. 2000;284-288(PART II):1677-1678.
Watanabe, Michio ; Itoh, Kohei M ; Ootuka, Youiti ; Haller, Eugene E. / Metal-insulator transition of NTD 70Ge : Ga in magnetic fields. In: Physica B: Condensed Matter. 2000 ; Vol. 284-288, No. PART II. pp. 1677-1678.
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