Zeeman and Piezo-Zeeman spectroscopy of acceptors in germanium

Baker, R. Jacob; Fisher, Peter; Freeth, C.A.; Ryan, Dan; Vickers, R.E.M.

doi:10.1016/0038-1098(94)00797-7

Cited by 10 publications

(12 citation statements)

References 17 publications

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“…2(b). The present data reproduce the rather linear trend observed previously to 17:5 T [10] and beyond, to about 20 T: Beyond 20 T; the trajectory straightens, and these data, especially at the highest fields, are well fitted by a straight line which passes through the unperturbed energy of the G line at B ¼ 0: On the basis of comparison with previous work the strong feature was previously identified [10] as the (8,5) transition. In the light of the new data beyond 20 T this assignment warrants reappraisal.…”

Section: Methodssupporting

confidence: 84%

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Zeeman spectroscopy of Be impurity in GaAs to

Lewis

Wang

Henini

2004

Physica B: Condensed Matter

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Section: Methodssupporting

confidence: 84%

“…The notation [8] ði; fÞ; where i and f are the subscripts of the irreducible representations ðO h Þ G i and G f of the initial and final states of an excitation experiment, will be used. The selection rules for BJ½0 0 1 allow transitions where i ¼ f for EJB; for E>B; one of i or f is odd and the other is even.…”

Section: Energy States In a Magnetic Fieldmentioning

confidence: 99%

Zeeman spectroscopy of Be impurity in GaAs to

Lewis

Wang

Henini

2004

Physica B: Condensed Matter

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“…For B ʈ͗100͘, the theory 14 predicts the reverse order from that observed of the splitting of the 1⌫ 7 + and 1⌫ 8 + Zeeman states. [21][22][23][24][25] This is also the case for the 1⌫ 3.2 + and 1⌫ 4.2 + states with B ʈ͗110͘. 26 The present data extend the experiments by a factor of more than 2.5ϫ in magnetic field, and the theory by a factor of almost 2ϫ, but do we expect any new physics?…”

Section: IIImentioning

confidence: 58%

Terahertz Zeeman spectroscopy of boron in germanium to high magnetic fields

et al. 2008

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The fundamental absorption lines of substitutional boron acceptor impurity in germanium, which lie between 1 and 3 THz, now have been measured in magnetic fields to 18 T, greatly extending the reach of both previous experiments ͑to 7 T͒ and theory ͑to 10 T͒. The Faraday configuration was employed with the magnetic field B ʈ͗110͘. Unexpected behavior has been observed relating to the magnetic-field-induced splitting of the ground and first two excited states ͑all of which are fourfold degenerate͒: ͑a͒ One pair of Zeeman ground states splits at only half the rate predicted with field; this behavior continues to high field. The other pair shows a rapid increase with field. ͑b͒ The two pairs of Zeeman states emerging from the first excited state initially separate with field, then, above 10 T, converge, almost meeting by 18 T. ͑c͒ One pair of the Zeeman states from the second excited state begins to plateau at high field; the other shows a dramatic decrease above 9 T, extrapolated to become zero at around 24 T. Taken together, these results suggest modification to the existing theory is required, and may have implications for quantum computation involving substitutional impurities.

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“…3. Optical transmission spectra at low temperature of Be impurity in GaAs for three magnetic fields: 0, 18, and 30 T. The Be concentration is 2.3ϫ10 16 cm Ϫ3 in a 3-m doped layer, corresponding to an areal density of 6.9ϫ10 12 cm Ϫ2 ; the layer is on a wedged substrate of nominally undoped GaAs of average thickness 364 m.…”

Section: A Overviewmentioning

confidence: 99%

“…The notation 16 (i, f ) where i and f are the subscripts of the irreducible representations (O h ) ⌫ i and ⌫ f of the initial and final states of an excitation experiment, will be used in this paper. In the notation of Schmitt et al 14 the order of the states is reversed.…”

Section: B Energy States In a Magnetic Fieldmentioning

confidence: 99%

Magnetospectroscopy of Be in GaAs

2003

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Far-infrared absorption measurements have been made of the Lyman series of the acceptor Be in GaAs up to magnetic fields of 30 T, supplemented by photothermal ionization spectroscopy measurements to 6 T. The results confirm and greatly extend previous work and reveal several phenomena. The strongest component of the G line moves to higher energies and increases in intensity with field. Around 20 T the field dependence of the transition displays a marked kink. At higher fields the dependence of energy on field is linear. This behavior is attributed to unresolved components that change in relative intensity with field and leads to a reappraisal of the identity of the low-field transition. The D line is followed to high fields allowing an accurate determination of the splitting of the field-induced components of the second excited state. Photothermal ionization spectra for the C line permit the determination of the splitting of the field-induced components of the ground state and of the third excited state. At high magnetic field an absorption appears which increases in energy with field at a much greater rate than any of the lines mentioned above. It is thought to originate in the valence-band Landau levels.

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Zeeman and Piezo-Zeeman spectroscopy of acceptors in germanium

Cited by 10 publications

References 17 publications

Zeeman spectroscopy of Be impurity in GaAs to

Zeeman spectroscopy of Be impurity in GaAs to

Terahertz Zeeman spectroscopy of boron in germanium to high magnetic fields

Magnetospectroscopy of Be in GaAs

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