Abstract:Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. An experimental study of the yellow exciton series in Cu 2 O in strong magnetic fields up to 32 T shows the optical activation… Show more
“…The corrections to the binding energy of the n = 2 level, produced by these mechanisms, are negligible]. Using ε = 7.5 for the dielectric constant 11,13,28 , we obtain the reduced mass μ = 0.41 m 0 in agreement with ref. 12 .Figure 5The magnetoabsorption spectra measured in the Faraday geometry, , together with the theoretically calculated magnetic field dependence of the energies (dashed lines) for the excitons with [panel (a), set 1] S z = −1 and m = 0 and [panel (b), set 2] S z = 0 and m = −1.…”
Section: Discussionsupporting
confidence: 86%
“…Due to the exchange interaction between the conduction and valence electrons in the n = 1 yellow exciton state, the energy of the ortho-exciton is 12 meV higher than that of para-exciton 3,25–28 .…”
We study the absorption spectra of the yellow excitons in Cu2O in high magnetic fields using polarization-resolved optical absorption measurements with a high frequency resolution. We show that the symmetry of the yellow exciton results in unusual selection rules for the optical absorption of polarized light and that the mixing of ortho- and para- excitons in magnetic field is important. The calculation of the energies of the yellow exciton series in strong and weak magnetic field limits suggests that a broad n = 2 line is comprized by two closely overlapping lines, gives a good fit to experimental data and allows to interpret the complex structure of excitonic levels.
“…The corrections to the binding energy of the n = 2 level, produced by these mechanisms, are negligible]. Using ε = 7.5 for the dielectric constant 11,13,28 , we obtain the reduced mass μ = 0.41 m 0 in agreement with ref. 12 .Figure 5The magnetoabsorption spectra measured in the Faraday geometry, , together with the theoretically calculated magnetic field dependence of the energies (dashed lines) for the excitons with [panel (a), set 1] S z = −1 and m = 0 and [panel (b), set 2] S z = 0 and m = −1.…”
Section: Discussionsupporting
confidence: 86%
“…Due to the exchange interaction between the conduction and valence electrons in the n = 1 yellow exciton state, the energy of the ortho-exciton is 12 meV higher than that of para-exciton 3,25–28 .…”
We study the absorption spectra of the yellow excitons in Cu2O in high magnetic fields using polarization-resolved optical absorption measurements with a high frequency resolution. We show that the symmetry of the yellow exciton results in unusual selection rules for the optical absorption of polarized light and that the mixing of ortho- and para- excitons in magnetic field is important. The calculation of the energies of the yellow exciton series in strong and weak magnetic field limits suggests that a broad n = 2 line is comprized by two closely overlapping lines, gives a good fit to experimental data and allows to interpret the complex structure of excitonic levels.
“…It has been demonstrated that Cu 2 O was an attractive material for the potential applications in the fields of photocatalysts [1,3], solar energy conversion [2], gas sensing [4,5], adsorbents [6], lubricants [7], lithium ion batteries [8], magnetic memories [9] and so on. Different morphologies of Cu 2 O crystals have their own advantages.…”
“…This technique has been extensively used in attempts to create trapped high-density excitons. Figures 7(a) and (b) illustrate the potential well formed in a Lucite crystal under Hertzian contact stress and a schematic of 7 One needs more than 10 T to observe noticeable exciton-level splitting in Cu 2 O induced by external magnetic field [Fishman et al (2009) stress experiments at low temperatures, respectively. Exciton drift into such a potential well in Cu 2 O at 2 K is clearly shown in Fig.…”
Section: Efficient Quadrupole Polariton Generation With Unconventionamentioning
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