Optically-detected EPR of excitons in AgCl, AgCl:Br and AgBr

Hayes, W.; Owen, I B; Walker, P.J.

doi:10.1088/0022-3719/10/10/017

Cited by 42 publications

(6 citation statements)

References 24 publications

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“…The ODMR results obtained from the 570 nm luminescence band confirm those of Hayes et al [8] and Marchetti [5]. The absence of cyclotron resonance effects in this luminescence indicate that trapping a t the centres responsible is much less sensitive to cyclotron heating of carriers.…”

Section: Discussionsupporting

confidence: 85%

Optically Detected Cyclotron Resonance in AgBr

Booth

Schwerdtfeger

1985

Physica Status Solidi (b)

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Optically detected magnetic resonance (ODMR) studies reveal cyclotron resonance of electrons and holes in AgBr as well as a number of paramagnetic resonances already observed by other workers. Cyclotron resonance signals are observed in the recombination radiation from excitons bound t o iodine isoelectronic impurities. Asymmetry of the electron-cyclotron resonance gives a measure of the nonparabolicity of the conduction band which results in an energy dependent effective mass. The enhanced trapping of electrons on iodine centres by interaction with LO phonons is discussed. Mit optisch

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Section: Discussionsupporting

confidence: 85%

Optically Detected Cyclotron Resonance in AgBr

Booth

Schwerdtfeger

1985

Physica Status Solidi (b)

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“…A self-trapped exciton(sm), formed from the sm and an electron, has also been observed in AgCl along with free and trapped electrons. A weak ODMR signal was observed in pure AgBr by Hayes et al (1977). This broad resonance (680G) at g = 1.8 was interpreted as being consistent with a proposed electron-hole recombination at silver specks consisting of two or more silver atoms.…”

Section: Introductionsupporting

confidence: 54%

Clearing of a polydisperse water aerosol by a laser pulse in the diffusive—convective regime

Kucherov

2006

Quantum Electron.

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Optically detected magnetic resonance spectra of pure and doped crystals of AgBr have been obtained at liquid helium temperatures. The free-electron g-value was found to be 1.49. This resonance is eliminated by electron-trapping dopants and enhanced by Cd2+ and P b 2 + . A resonance at g = 2.08 has been assigned as the free-hole resonance. This resonance is enhanced by electron-trapping dopants and by Cd2+ and P b Z + . Two strong resonances were found at g-values of 1.81 and 1.76. These resonances are thought to be from carriers trapped at intrinsic sites.

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“…The same applies for the triplet state of the STE, but here a high-field ͑HF͒ and low-field ͑LF͒ resonance is observed per site, due to the zero-field splitting. 4,5 The isotropic signal at Bϭ3.6130 T ͑gϭ1.878͒ on the right in Fig. 1 is typical for shallow electron centers ͑SEC's͒ which can be of intrinsic or extrinsic nature.…”

Section: Methodsmentioning

confidence: 98%

Spatial distribution of the wave function of the self-trapped exciton in AgCl

et al. 1996

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The results are presented of a high-frequency electron nuclear double resonance ͑ENDOR͒ study of the lowest triplet state of the self-trapped exciton in AgCl. Direct information about the spatial distribution of the wave function is obtained, which confirms that the exciton in its triplet state is built up from a strongly localized self-trapped hole and a very diffuse electron. The electron is mainly contained in a hydrogenlike 1s orbital with a Bohr radius of 15.1Ϯ0.6 Å, but near its center the electron density deviates from spherical symmetry and reflects the D 4h charge distribution of the hole. From a comparison with the results of an ENDOR study of the self-trapped hole, it is concluded that the microscopic and electronic structure of a self-trapped hole is not significantly altered by the attraction of a shallow electron. No evidence is obtained for the formation of Frenkel pairs in AgCl upon ultraviolet irradiation at low temperatures.

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Optically-detected EPR of excitons in AgCl, AgCl:Br and AgBr

Cited by 42 publications

References 24 publications

Optically Detected Cyclotron Resonance in AgBr

Optically Detected Cyclotron Resonance in AgBr

Clearing of a polydisperse water aerosol by a laser pulse in the diffusive—convective regime

Spatial distribution of the wave function of the self-trapped exciton in AgCl

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