Magneto-absorption spectra of hydrogen-like yellow exciton series in cuprous oxide: excitons in strong magnetic fields

Artyukhin, Sergey; Fishman, Dmitry A.; Faugeras, C.; Potemski, M.; Revcolevschi, A.; Mostovoy, Maxim; Loosdrecht, P.H.M. van

doi:10.1038/s41598-018-25486-6

Cited by 10 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rydberg excitons in Cu 2 O were identified and studied in electric [17,18] and magnetic fields [19][20][21][22][23]. Studies of the absorption spectrum revealed quantum coherences [24] and brought an understanding of the interactions of Rydberg excitons with phonons and photons [25][26][27], dilute electron-hole plasma [13,14], and charged impurities [28].…”

mentioning

confidence: 99%

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Versteegh,

Steinhauer,

Bajo

et al. 2021

Preprint

View full text Add to dashboard Cite

Rydberg excitons are, with their ultrastrong mutual interactions, giant optical nonlinearities, and very high sensitivity to external fields, promising for applications in quantum sensing and nonlinear optics at the single-photon level. To design quantum applications it is necessary to know how Rydberg excitons and other excited states relax to lower-lying exciton states. Here, we present photoluminescence excitation spectroscopy as a method to probe transition probabilities from various excitonic states in cuprous oxide, and we show giant Rydberg excitons at T = 38 mK with principal quantum numbers up to n = 30, corresponding to a calculated diameter of 3 µm.

show abstract

mentioning

confidence: 99%

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Versteegh,

Steinhauer,

Bajo

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The experimental setup is the same as that used and described in [13]. In short, the magneto-absorption experiments were performed in Faraday geometry, at magnetic fields up to 32 T generated by a resistive magnet at the Grenoble High Magnetic Field Laboratory.…”

Section: Methodsmentioning

confidence: 99%

“…For intermediate magnetic fields one has to include both Coulomb interaction and the influence of the magnetic field. This asks for a different theoretical approach, which may include (but is not limited to) variational or matrix diagonalization techniques [13]. In our studies we use a Greenʼs function method [11].…”

Section: Intermediate Fieldsmentioning

confidence: 99%

“…It has been concluded that the region of high magnetic fields for excitons in Cu 2 O can be reached within several Teslas from experiments performed up to 4 T [3]. In work by Artyukin et al [13], the experimental observations in magnetic field up to 32 T are presented and values for weak and intermediate regimes are discussed. Note, the limit between the intermediate and high fields is not sharply defined thus a smooth transition can be expected.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magneto-excitons in Cu₂O: theoretical model from weak to high magnetic fields

et al. 2019

Self Cite

View full text Add to dashboard Cite

Recent experimental and theoretical work on hydrogen-like absorption spectra of excitons in external magnetic fields revealed new effects when the Coulomb interaction becomes comparable to the magnetic perturbation. We present a theoretical approach that allows for calculation of absorption spectra for any value of magnetic field. This approach opens the possibility to compute the optical functions i.e. reflectivity, transmission and absorption including the excitonic effects for various strength of external magnetic field.

show abstract

“…Observations like this, together with the ongoing research related to excitonic Bose-Einstein condensation [29], sparked extensive theoretical and experimental investigations on excitons in Cu 2 O in order to gain a deeper insight into spectroscopic features beyond a simple hydrogen-like model [30][31][32][33][34]. In these studies, the precise knowledge of wavefunctions of excitons, or the IQP Bloch states of which the excitonic state is composed, is of great importance.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of incoherent exciton formation inCu2O: Time- and angle-resolved photoemission spectroscopy

Tanimura

Loosdrecht

2019

Phys. Rev. B

View full text Add to dashboard Cite

We study dynamics of incoherent exciton formation under interband photoexcitation in Cu 2 O using time-and angle-resolved photoemission spectroscopy at 90 K. Hot electrons injected by allowed optical transitions with 3.40-eV photons show ultrafast relaxation to the conduction-band minimum (CBM), surviving up to 500 fs after excitation. While hot-electron states with high excess energy show a rapid population decay of ~25 fs, an abrupt increase to 130 fs is observed for states with excess energies of 0.15 eV. This latter is interpreted in terms of phonon bottleneck dynamics characteristic of LO-phonon mediated energy relaxation. Excitons, having a small binding energy of 60 meV, are formed below the CBM quasi-instantaneously and subsequently relax to the 1S-exciton state of the yellow series within 1.5 ps. We find that, together with possible plasma screening for electron-hole interaction, the cooling of exciton center-of-mass motion plays an important role in the exciton relaxation dynamics. The characteristic features of exciton photoionization process are critically discussed based on the detailed analysis of angle-resolved photoemission results for the 1S excitons formed 1.5 ps after excitation.Using time-and angle-resolved photoemission spectroscopy, transient changes of photoinjected hot-electron populations in energy and momentum spaces have been studied with fs-temporal resolution, providing a direct view on hot electron relaxation processes [10][11][12]. The method has been applied to several semiconductors, and ultrafast relaxation processes of hot carriers in bulk electronic states have been revealed directly [13][14][15][16][17][18][19][20][21][22][23]. Because of the renewed interest in Cu 2 O with respect to solar-cell applications and as a promising p-type transparent conductive oxide [24], understanding of the hot carrier dynamics in this material is of great importance as an indispensable basis to improve efficiencies in optoelectronic device applications. In addition to this, photoemission spectroscopy for excitonic states provides a unique capability to obtain a detailed insight into the wavefunctions of excitons [25][26][27].Recent experiments showing that the yellow-series excitons could be followed up to a high principal quantum number of n = 25 [28] boosted the renewed interest in excitons in Cu 2 O.Observations like this, together with the ongoing research related to excitonic Bose-Einstein condensation [29], sparked extensive theoretical and experimental investigations on excitons in Cu 2 O in order to gain a deeper insight into spectroscopic features beyond a simple hydrogen-like model [30][31][32][33][34]. In these studies, the precise knowledge of wavefunctions of excitons, or the IQP Bloch states of which the excitonic state is composed, is of great importance. However, the correlation between an excitonic state and the IQP Bloch states responsible for the excitonic state, which links directly the excitonic picture and IQP band structures, has so far not been obtained experimentally. T...

show abstract

Magneto-absorption spectra of hydrogen-like yellow exciton series in cuprous oxide: excitons in strong magnetic fields

Cited by 10 publications

References 28 publications

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Magneto-excitons in Cu₂O: theoretical model from weak to high magnetic fields

Dynamics of incoherent exciton formation inCu2O: Time- and angle-resolved photoemission spectroscopy

Contact Info

Product

Resources

About

Magneto-absorption spectra of hydrogen-like yellow exciton series in cuprous oxide: excitons in strong magnetic fields

Cited by 10 publications

References 28 publications

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Giant Rydberg excitons in Cu$_{2}$O probed by photoluminescence excitation spectroscopy

Magneto-excitons in Cu2O: theoretical model from weak to high magnetic fields

Dynamics of incoherent exciton formation inCu2O: Time- and angle-resolved photoemission spectroscopy

Contact Info

Product

Resources

About

Magneto-excitons in Cu₂O: theoretical model from weak to high magnetic fields