The influence of alloy disorder on the k.p interaction in (GaIn)(AsP)/InP

Shantharama, L. G.; Nicholas, R.J.; Adams, A.R.; Sarkar, C. K.

doi:10.1088/0022-3719/18/16/001

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…4. A linear increase is observed, with a slope dmzldP = 3.7 x lo-'' m k b a r ' , which is very different from the value ( = 7 x lo-" m kbar-') determined from magnetophonon measurements under pressure (3,16). Using the Kane theoretical expression (17): and keeping E, constant throughout our pressure range, we find dmgldP = 4.6 x lo-" m k b a r ' .…”

Section: Methodscontrasting

confidence: 60%

“…The design of devices and the optimization of their performances require a detailed knowledge of the properties of the basic materials, and one of the most important parameters to be known with precision is the value of the electron effective mass and its variation with energy. Several reports have been published on this matter concerning bulk Ga, ,,In, ,,As, based on far-infrared techniques (1,2), magnetophonon effect measurements (2,3), as well as interband magnetoabsorptlon measurements (4). Farinfrared and magnetophonon measurements revealed that the effective mass increases faster with energy than predicted by standard k -p theory (1 -3).…”

Section: Introductionmentioning

confidence: 99%

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Magneto-optical study of Ga_0.47In_0.53As–InP under hydrostatic pressure

Beerens¹,

Bernier²,

Lasserre³

et al. 1991

Can. J. Phys.

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Far-infrared and interband photoconductivity measurements were carried out on high-purity Ga,, ,,In,, ,,As. All the measurements were performed at 4.2 K or below in magnetic fields up to 16 T. Hydrostatic pressure of up to 10 kbar (I bar = 10' Pa) was also applied on the sample during the experiments, using the liquid clamp cell technique. Our work was mainly focussed on the study of conduction-band nonparabolicity. The dependence of the electron effective mass toward energy was accurately determined from our cyclotron resonance measurements and compared with a theoretical description that includes nonparabolicity and magnetopolaron effects. We find that the nonparabolicity coefficient and its variation with pressure are in agreement with the theoretical predictions based on the Kane model, when the contribution of magnetopolaron effect is included in the data analysis. These results are correlated with those obtained in the interband measurements, which have been analysed within a Pidgeon-Brown approach. Some interesting data concerning impurity states were also obtained in our farinfrared photoconductivity measurements. A much richer set of Zeeman-split impurity-related peaks were recorded, as compared with previously published results. The influence of pressure, nonparabolicity, and the magnetopolaron effect on the position of these peaks will be briefly discussed.Des mesures de photoconductivite dans I'infrarouge lointain et de photoconductivitC interbande ont CtC effectuees sur du Ga,,,,In,,,,As de grande puretC. Toutes ces mesures ont CtC faites 8 4,2 K ou au-dessous, dans des champs magnCtiques allant jusqu'a 16 T. Une pression hydrostatique allant jusqu'i 10 kbar (I bar = 10' Pa) Ctait aussi appliquCe a I'Cchantillon durant les mesures, en utilisant la technique de la cellule a clamp liquide. Notre travail Ctait principalement orient6 vers 1'Ctude de la non-parabolicit6 de la bande de conduction. La f a~o n dont la masse Clectronique effective dCpend de 1'Cnergie a CtC dCterminCe avec prCcision a partir de nos mesures de resonance cyclotronique et comparCe avec une description thCorique qui inclut les effets de la non-parabolicit6 et des magnkto-polarons. Nous trouvons que le coefficient de non-parabolicit6 et sa variation avec la pression sont en accord avec les predictions thkoriques basCes sur le modkle de Kane, lorsque la contribution de I'effet magnCto-polaron est incluse dans I'analyse des donnCes. Ces rtsultats sont mis en corrClation avec ceux qui proviennent des mesures de photoconductivitC interbande, lesquelles ont CtC analysees selon I'approche Pidgeon-Brown. Certaines donnCes interessantes concernant les Ctats d'impuretCs ont aussi CtC obtenues dans nos mesures de photoconductivitC dans I'infrarouge lointain. On a enregistrk un ensemble beaucoup plus riche, en comparaison avec les rCsultats publiCs antirieurement, de pics reliCs aux impuretks et sCparCs par effet Zeeman. L'influence de la pression, de la non-parabolicit6 et de I'effet magnCtopolaron sur la position des pics est brikvement dis...

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Section: Methodscontrasting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Magneto-optical study of Ga_0.47In_0.53As–InP under hydrostatic pressure

Beerens¹,

Bernier²,

Lasserre³

et al. 1991

Can. J. Phys.

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show abstract

“…Such an interpretation is consistent with the fact that electron-phonon coupling is increased at high pressure because the 2D carrier concentration becomes low and the screening of the electron-phonon interaction is suppressed [23]. On the other hand, in GaInAs-based heterojunctions with AlInAs [23] and InP [24] barrier layers, the band-edge effective mass was estimated to increase with pressure at a rate smaller than that estimated for bulk GaInAs [29]. For GaInAs/InP heterojunctions this deviation was found to be dependent on the 2D carrier concentration, being smaller for lower-concentration and more important for higherconcentration samples.…”

Section: Magnetophonon Resonance In 2d Systems Under Hydrostatic Pres...supporting

confidence: 67%