Microwave conduction in n-type germanium in the presence of a high steady electric field is studied The carrier concentration is assumed to be high enough to ensure that intercarrier collisions enforce a Maxwellian distribution on the carriers and the momentum loss by the carriers occurs mainly through scattering due to lattice vibrations. The effect of anisotropic effective mass on the microwave conduction characteristics is discussed, and the anisotropy is found to be small at room temperature Numerical values of microwave conductivity and the change in dielectric constant are found to agree with the experimental results of a 4 68 Ω cm n-type germanium sample, and the best fit with the experimental characteristics is obtained for a value of the optical deformation potential constant D0 between 0 7 to 0 8 × 109 ev cm-1.

S GUHA

B R NAG

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Microwave conduction in n-type germanium under hot electron conditions

Proceedings of the Physical Society

The hot-carrier microwave conductivity characteristics of the elemental semiconductors are reviewed. Significant features of the microwave incremental conductivity and also of the high-field microwave conductivity are critically analysed. These features are explained from simple physical considerations. Comparison is then made between the detailed theories and the experimental results. It is shown that most of the features of the microwave conductivity characteristics agree with those expected from theory. Some of the finer details of the characteristics which require further investigations are also indicated. © 1968.

Solid State Electronics

Hot-carrier microwave conductivity of elemental semiconductors

The characteristics of hot-carrier magnetoresistance for small magnetic fields are studied with the assumptions: (a) The constant-energy surfaces are spherical and carriers are scattered by acoustic and optical phonons; and (b) the constant-energy surfaces are ellipsoidal and the scattering is due to acoustic, optical, and intervalley phonons. It is shown that for a spherical constant-energy-surface model the magnetoresistance has a small negative value decreasing with increasing field, and the magnetoresistance coefficient is independent of the field if the scattering is by acoustic phonons alone. On the other hand, for predominant optical-phonon scattering the magnetoresistance and also the magnetoresistance coefficient are positive and decrease with increasing field. In the case of many-valley band structure as in n-type germanium, the characteristics of magnetoresistance and magnetoresistance coefficient for predominant acoustic-phonon scattering are the same as for a spherical constant-energy-surface model, but the sign is positive and the values are larger. The variation of magnetoresistance and magnetoresistance coefficient for predominant optical-phonon scattering when the electric field is in the [100] direction is similar to that for a spherical constant-energy-surface model, but the values are higher and the characteristic varies in details. For the [111] direction of the field, on the other hand, the magnetoresistance decreases with the field, but the magnetoresistance coefficient increases with the field. The values of magnetoresistance calculated from theory, assuming acoustic- and optical-phonon scattering, are found to agree closely with the experimental results. The inclusion of the effects of intervalley scattering leads to a further improvement in the agreement. © 1966 The American Physical Society.

Physical Review

Hot-carrier magnetoresistance

Phys. Chem. Chem. Phys.

Contents list

Canadian Journal of Physics

DRIFT VELOCITY OF HOT ELECTRONS IN n-TYPE GERMANIUM

The Anisotropy of the Conductivity of Hot Electrons and their Temperature in Germanium

Journal of Physics and Chemistry of Solids

Lattice mobility of hot carriers

Journal	Proceedings of the Physical Society
Publisher	-
ISSN	0370-1328