Direct measurement via cyclotron resonance of the carrier effective masses in pristine diamond

Naka, N.; Fukai, Katsuyuki; Handa, Yushi; Akimoto, Ikuko

doi:10.1103/physrevb.88.035205

Cited by 81 publications

(61 citation statements)

References 26 publications

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“…From the ratio hot/cool valley drift mobility at low fields the ratio of longitudinal to transversal effective mass can be calculated: we find m l /m t = 5.2 ± 0.2 [27] in agreement with recent ab-initio bandstructure calculations: m l /m t = 5.2-5.5 [32]. In recent cyclotron resonance measurements a slightly higher value was obtained: m l /m t = 5.5 [33]. The ratio is also in agreement with older band structure calculations of Baldereschi (found in ref.…”

Section: Methodssupporting

confidence: 74%

Charge Transport Phenomena Unique to Diamond

et al. 2014

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Diamond is a unique material in many respects. One of the most well-known extreme properties of diamond is its ultrahardness. This property of diamond actually turns out to have interesting consequences for charge transport, in particular at low temperatures. In fact, the strong covalent bonds that give rise to the ultrahardness results in a lack of short wavelength lattice vibrations which has a strong impact on both electron and hole scattering. In some sense diamond behaves more like a vacuum than other semiconductor materials. In this paper we describe some interesting charge transport properties of diamond and discuss possible novel electronic applications.

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Section: Methodssupporting

confidence: 74%

Charge Transport Phenomena Unique to Diamond

et al. 2014

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“…10,11 Finally we note that there is considerable room for improvement in the hole mobility: the bulk mobility of holes in diamond is already 6000 cm 2 V −1 s −1 , and values higher than this can likely be attained by utilizing surface gates and ionic liquid dielectrics to reduce the amount of ionized impurity scattering, while interband scattering is eliminated by the 2D confinement. 25 ■ ASSOCIATED CONTENT * S Supporting Information Technical information and figures on the device fabrication, hole−hole interaction correction, and calculation of the transport relaxation time and in-plane carrier effective mass. There is also further discussion of fitting the magnetoconductivity data to 2D localization theory.…”

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confidence: 99%

Spin–Orbit Interaction in a Two-Dimensional Hole Gas at the Surface of Hydrogenated Diamond

et al. 2014

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Hydrogenated diamond possesses a unique surface conductivity as a result of transfer doping by surface acceptors. Yet, despite being extensively studied for the past two decades, little is known about the system at low temperature, particularly whether a two-dimensional hole gas forms at the diamond surface. Here we report that (100) diamond, when functionalized with hydrogen, supports a p-type spin-3/2 two-dimensional surface conductivity with a spin-orbit interaction of 9.74 ± 0.1 meV through the observation of weak antilocalization effects in magneto-conductivity measurements at low temperature. Fits to 2D localization theory yield a spin relaxation length of 30 ± 1 nm and a spin-relaxation time of ∼ 0.67 ± 0.02 ps. The existence of a 2D system with spin orbit coupling at the surface of a wide band gap insulating material has great potential for future applications in ferromagnet-semiconductor and superconductor-semiconductor devices.

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“…We performed the TRCR measurement with an X-band EPR equipment (Bruker, ELEXSYS E580) under optical excitation with 5-ns laser pulses at the ultraviolet range, as described in our previous papers [9][10][11]17]. We examined two dislocation-free HPHT diamond crystals of single sector supplied by TISNCM (Russia): a (001)-oriented cylindrical crystal with 1 mm diameter and 1 mm thickness (abbreviated as (001)-HPHT diamond) and a (111)-oriented square substrate of 2 × 2 × 0.3 mm 3 (abbreviated as (111)-HPHT diamond).…”

Section: Methodsmentioning

confidence: 99%

“…The spectral analysis of CR below 40 K revealed definite effective masses and momentum relaxation times of electron and hole in diamond [9], and then enabled us to extract values of carrier drift mobilities [10]. We could extract the highest mobilities ever reported at room temperature, μ e (μ h ) = 7300(5300) cm 2 /Vs by extrapolating the temperature dependence of the momentum relaxation times according to the phonon scattering model [10].…”

Section: Introductionmentioning

confidence: 99%

“…We have so far measured time-resolved cyclotron resonance (TRCR) of optically injected carriers in high-purity diamond crystals with a time resolution of 13 ns [9][10][11]. The spectral analysis of CR below 40 K revealed definite effective masses and momentum relaxation times of electron and hole in diamond [9], and then enabled us to extract values of carrier drift mobilities [10].…”

Section: Introductionmentioning

confidence: 99%

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