Magneto-optical study of excitons in quantum wells, wires and dots in high magnetic fields

Miura, N.; Kunimatsu, H.; Uchida, K.; Matsuda, Yasuhiro H.; Yasuhira, T.; Nakashima, Hisao; Sakuma, Yoshiki; Awano, Yuji; Futatsugi, T.; Yokoyama, Naoki

doi:10.1016/s0921-4526(98)00595-x

Cited by 15 publications

(7 citation statements)

References 14 publications

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“…Exposure time of the detector was chosen to be 1 µs to keep field variation within 4% during the gate opening time. While for E 22 measurements, a streak camera (C4187-25S, Hamamatsu Photonics) was used and thus magneto-absorption spectrum could be monitored continuously for the whole duration time of the pulsed field [22]. All the spectra were taken under the Voigt geometry at room temperature.…”

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confidence: 99%

Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahigh magnetic fields

et al. 2013

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We report high field magneto-optical study on the first and second sub-band transitions of singlechirality single-walled carbon nanotubes. The ordering and relative energy splitting between bright and dark excitonic states were found to be inversed between the first and second subbands. We verified that the zero-momentum dark singlet exciton lies below the bright exciton for the first subband transitions, while for the second sub-band transitions, it was found to have higher energy than the bright excitonic state. Effect of this peculiar excitonic structure was found to manifest itself in distinctive Aharonov-Bohm splitting in ultra-high magnetic fields up to 190 T.

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confidence: 99%

Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahigh magnetic fields

et al. 2013

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“…A Xe arc-flash lamp was used as a light source and light was guided into and out of the sample by optical fibers as shown in Ref. [16].…”

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confidence: 99%

Magnetic Phases of a Highly Frustrated Magnet,ZnCr2O4, up to an Ultrahigh Magnetic Field of 600 T

Miyata

Ueda

et al. 2011

Phys. Rev. Lett.

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The Faraday rotation and magneto-optical absorption spectral measurements were conducted to reveal the full-magnetization process and map out a magnetic phase diagram of a typical geometrical frustrated magnet, ZnCr(2)O(4), by using the electro-magnetic flux compression method in ultrahigh magnetic fields up to 600 T. A fully polarized ferromagnetic phase is observed in which the absorption spectra associated with an exciton-magnon-phonon transition disappears. Furthermore, prior to the fully polarized ferromagnetic phase above 410 T, we found a novel magnetic phase above 350 T at 4.6 K followed by a canted 3∶1 phase.

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“…In this case, the optical transition is detected between the valence and conduction band states; thus, the reduced effective mass

is determined. The magneto-absorption experiment was successfully used to determine the mass of charge carriers in traditional fully inorganic bulk semiconductors [ 6 , 7 , 8 ] and lower dimensional variants [ 6 , 9 ]. This method was also successfully used to determine the reduced effective mass in the family of 3D organic–inorganic halide perovskites [ 10 , 11 , 12 , 13 ] and, more recently, for its derivatives, namely 2D layered perovskites [ 14 , 15 ].…”

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confidence: 99%

Using the Diamagnetic Coefficients to Estimate the Reduced Effective Mass in 2D Layered Perovskites: New Insight from High Magnetic Field Spectroscopy

Dyksik

2022

IJMS

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In this work, the current state of research concerning the determination of the effective mass in 2D layered perovskites is presented. The available experimental reports in which the reduced effective mass μ has been directly measured using magneto-absorption spectroscopy of interband Landau levels are reviewed. By comparing these results with DFT computational studies and various other methods, it is concluded that depending on the approach used, the μ found spans a broad range of values from as low as 0.05 up to 0.3 me. To facilitate quick and reliable estimation of μ, a model is proposed based solely on the available experimental data that bypass the complexity of interband Landau level spectroscopy. The model takes advantage of the μ value measured for (PEA)2PbI4 and approximates the reduced effective mass of the given 2D layered perovskites based on only two experimental parameters—the diamagnetic coefficient and the effective dielectric constant. The proposed model is tested on a broad range of 2D layered perovskites and captures well the main experimental and theoretical trends.

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Magneto-optical study of excitons in quantum wells, wires and dots in high magnetic fields

Cited by 15 publications

References 14 publications

Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahigh magnetic fields

Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahigh magnetic fields

Magnetic Phases of a Highly Frustrated Magnet,ZnCr2O4, up to an Ultrahigh Magnetic Field of 600 T

Using the Diamagnetic Coefficients to Estimate the Reduced Effective Mass in 2D Layered Perovskites: New Insight from High Magnetic Field Spectroscopy

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