Hall effect of acceptor intercalation compounds in stages 1–3

Barati, Mansoor; Dube, Paul A.; Ummat, P. K.; Datars, W. R.

doi:10.1016/s0038-1098(98)00144-6

Cited by 3 publications

(3 citation statements)

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“…For the stage-2 IBr n = 8.1 × 10 26 m −3 and for stage-3 HgBr 2 n = 7.9 × 10 26 m −3 . These values are within the range of values 6.8 × 10 26 m −3 to 8.5 × 10 26 m −3 which has been reported for the low stages of chloride compounds [9].…”

Section: Discussionsupporting

confidence: 87%

“…Although a number of studies has been made of the electronic properties of donor compounds containing the alkali metals [2], a systematic knowledge of the transport properties of the acceptor GICs, especially with halogen molecules, is limited. Among these investigations the study of the resistivity of the AsF 5 GIC [3,4] and a wide range of studies of different stages of the SbCl 5 GIC [5,6], the electronic properties and structural phase transitions of the low stages of the ICl GICs [7,8] and the recent study of the Hall effect in the low stages of different chloride GICs [9] are mentioned here. To our knowledge, a rather small amount of work on the electronic properties of the bromide GICs has been reported.…”

Section: Introductionmentioning

confidence: 99%

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Electron-phonon scattering in HgBr₂and IBr graphite intercalation compounds

Barati

Ummat

Datars

1999

J. Phys.: Condens. Matter

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The Hall coefficient and the dc resistivity in the basal plane and along the c axis of stage-2 IBr and stage-3 HgBr2 graphite intercalation compounds (GICs) were measured between 4.2 and 370 K. The resistivity of the IBr GIC indicates a metallic-like behaviour and a structural phase transition at 175 K. The Hall coefficient above 300 K of the HgBr2 GIC indicates deintercalation from an irreversible reduction of the carrier concentration. A study of the temperature dependence of the resistivity and Hall coefficient of the stage-2 IBr GIC above room temperature shows that the electron-out-of-plane phonon scattering plays a major role in this compound. The Hall coefficients are temperature independent below room temperature. The one-carrier model gives a value of 8.1 × 1026 m-3 for the IBr and a value of 7.9 × 1026 m-3 for the HgBr2 GIC for the carrier concentrations.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Electron-phonon scattering in HgBr₂and IBr graphite intercalation compounds

Barati

Ummat

Datars

1999

J. Phys.: Condens. Matter

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“…The measured value of R H = (4.5 ± 0.05) × 10 −8 m 3 C −1 gives n = 1.4 × 10 26 m −3 . This is about one-sixth of those of most stage 2 and 3 GICs [19].…”

Section: Discussionmentioning

confidence: 87%

Electric and magnetic properties of the stage-2 FeBr₂graphite intercalation compound

Dube

Barati

Ummat

et al. 2002

J. Phys.: Condens. Matter

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The stage-2 FeBr2 graphite intercalation compound (GIC) was prepared by reacting FeBr2 powder and highly oriented pyrolytic graphite in a bromine atmosphere at 500°C for 40 weeks. The dc magnetization, ac susceptibility, specific heat, resistivity and Hall effect were measured. The GIC is paramagnetic at temperatures above 14.5 K. There is short-range ordering at 14.5 K and longer-range magnetic ordering at 8.5 K. There is a spin glass phase below 3.2 K in which the ac susceptibility is frequency dependent. The in-plane and c-axis resistivities result from in-plane and out-of-plane electron–phonon scattering. The Hall coefficient is independent of temperature between 4.2 and 300 K and is explained by the single-carrier model.

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