On the Jahn-Teller-induced helical deformations in CsCuCl<sub>3</sub>

Maaskant, W.J.A.; Haije, W. G.

doi:10.1088/0022-3719/19/27/007

Cited by 24 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They proposed the (A 1g + T 2g ) ⊗ (a 1g + e g + t 2g + t 1u ) vibronic coupling scheme but without detailed solution of the problem. This scheme has been more fundamentally studied in a linear approximation by Bersuker and Polinger [26] and by Maaskant and Bersuker [27] although an alternative (E g + E u ) ⊗ (e g + e u ) scheme has been also proposed [28]. Effects of the third and fourth order anharmonicity were taken into account in description of the experimental results of the SrO:Ni + system [29].…”

Section: Theoretical Description Of the Off-centre Jahn-teller Effectmentioning

confidence: 99%

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal

Hoffmann

Уланов

2000

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Temperature cw-EPR and pulsed EPR electron spin echo experiments were performed for a low concentration of Cu2+ ions in cubic SrF2 crystals. The well resolved EPR spectrum at low temperatures (below 30 K) with parameters g = 2.493, g = 2.083, A = 121, A = 8.7, A (19 F) = 135, A (19 F) = 33.0 (A -values in 10-4 cm-1 ) is transformed continuously into a single broad line above 225 K on heating, due to the g -factor shift and EPR line broadening. These data along with the angular variation EPR data are described in terms of a pseudo-Jahn-Teller effect of (T2g +A2u ) (a1g +eg +t1u ) type producing six off-centre positions of the Cu2+ ion in the fluorine cube. Above 30 K a two-step averaging g -factor process occurs and is governed by vibronic dynamics between potential wells of the off-centre positions. This dynamics governs the electron spin relaxation in the whole temperature range. The electron spin-lattice relaxation rate 1/T 1 grows rapidly by six orders of magnitude in the temperature range 30-100 K and is determined by the Orbach-type process with excitations to two excited vibronic levels of energy 83 and 174 cm-1 . For higher temperatures the relaxation is dominated by overbarrier jumps leading to the isotropic EPR spectrum above 225 K. The phase memory time TM has the rigid lattice value 3.5 µs determined by nuclear spectral diffusion and its temperature variation is governed by the vibronic dynamics indicating that the excitations between vibronic levels produce a dephasing of the electron spin precessional motion.

show abstract

Section: Theoretical Description Of the Off-centre Jahn-teller Effectmentioning

confidence: 99%

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal

Hoffmann

Уланов

2000

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…After centrifugation and purification of the precipitates, the orange solution containing the CsCuCl 3 NCs would be obtained (Figure a). The CsCuCl 3 crystal has an achiral P 6 3 / mmc structure above the transition temperature ( T c = 423 K), and below that temperature changes to a chiral crystal structure belonging to P 6 1 22 (right-handed) or P 6 5 22 (left-handed) through the cooperative Jahn–Teller effect, ,, inducing the constituent Cu atoms to be distorted from the normal position so that a helix chain is formed along the c -axis (Figure b). Figure c shows an enlarged view of such quasi-one-dimensional chains of Cu(II) ions, displaying the right-/left-handed helical array with a period of six ions along the c -axis, respectively.…”

mentioning

confidence: 99%

Chiroptical Activity in All-Inorganic Intrinsically Chiral Perovskite-like Nanocrystals Synthesized via Enantioselective Strategy

Cao

Jiao

et al. 2023

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Enantiomeric control of intrinsically chiral inorganic nanocrystals (NCs), despite being reported in few systems over the past years, still remains a challenging task. Here, we succeeded in the enantioselective synthesis of intrinsically chiral perovskite-like CsCuCl3 NCs in the presence of chiral amino acids using an antisolvent crystallization method at room temperature. The d-/l-ligand-induced enantiomeric NCs showed the relevant characteristic chiroptical responses. Interestingly, under the addition of each d- or l-form of the ligand, the chiroptical activity of the NCs could be tailored through facilely tuning the Cs/Cu feed ratios and amino acid types. The polarity of such amino acids and their coordination configurations with the NC structures contributed to the distinct behaviors. The ability to manipulate the ligand-induced enantioselective strategy would open pathways for the controllable synthesis of intrinsically chiral inorganics and enable a better understanding of the origins of precursor-ligand-associated chiral discrimination and crystallization phenomena.

show abstract

“…Hence, a more accurate confining potential model, though less generic, can be obtained using a more detailed formulation of the crystal field and the JT distortion for the particular case of CsCuCl 3 -see, eg., Ref. [37]. Finally, our estimate of the unknown combination C D/L δ in terms of α A [Eq.…”

Section: Appendix B: Mchd In Eprmentioning

confidence: 99%

Traveling wave enantio-selective electron paramagnetic resonance

Donaire¹,

Bruyant²,

Rikken³

2023

Preprint

View full text Add to dashboard Cite

show abstract

On the Jahn-Teller-induced helical deformations in CsCuCl₃

Cited by 24 publications

References 16 publications

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal

Chiroptical Activity in All-Inorganic Intrinsically Chiral Perovskite-like Nanocrystals Synthesized via Enantioselective Strategy

Traveling wave enantio-selective electron paramagnetic resonance

Contact Info

Product

Resources

About

On the Jahn-Teller-induced helical deformations in CsCuCl3

Cited by 24 publications

References 16 publications

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu2+ions in SrF2crystal

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu2+ions in SrF2crystal

Chiroptical Activity in All-Inorganic Intrinsically Chiral Perovskite-like Nanocrystals Synthesized via Enantioselective Strategy

Traveling wave enantio-selective electron paramagnetic resonance

Contact Info

Product

Resources

About

On the Jahn-Teller-induced helical deformations in CsCuCl₃

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal

Off-centre dynamic Jahn-Teller effect studied by electron spin relaxation of Cu²⁺ions in SrF₂crystal