✦ LIBER ✦

Multiple quantum NMR spin dynamics in one-dimensional quantum spin chains

✍ Scribed by Edward B. Fel'dman; Serge Lacelle

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 298 KB
Volume: 253
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(96)00239-4

No coin nor oath required. For personal study only.

✦ Synopsis

Multiple quantum NMR spin dynamics arising from a two-quantum/two-spin non-secular average dipolar Hamiltonian are solved exactly for an infinite one-dimensional (l-D) quantum spin 1/2 chain with nearest-neighbor dipole-dipole interactions and initially at thermal equilibrium in a Zeeman field. Using fermion field-theoretic representations of spin 1/2 operators, the calculations yield analytical expressions valid for all times for the spin density operator, multiple quantum NMR spectral intensities, and multiple spin correlations. Implications and perspectives for multiple quantum NMR of materials with 1-D distributions of spins are briefly discussed.

📜 SIMILAR VOLUMES

Multiple-quantum artifacts in single-qua

Multiple-quantum artifacts in single-quantum two-dimensional correlated NMR spectra of strongly coupled spins

✍ N. Murali; Ami Kumar 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 350 KB

Artifacts in the form of cross peaks have been observed along two-and three-quantum diagonals in single-quantum two-dimensional correlated (COW) spectra of several peptides and oligonucleotides. These have been identified as due to the presence of a non-equilibrium state of kind I (a state describab

Electronic and spin dynamics in one-dime

Electronic and spin dynamics in one-dimensional chains studied by path-integral quantum Monte Carlo simulations

✍ Luis Utrera; Joachim Schulte; Michael C. Böhm 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 374 KB

Indirect Spin–Spin Coupling in Multiple-

Indirect Spin–Spin Coupling in Multiple-Quantum Magic-Angle-Spinning NMR Spectra of Quadrupolar Nuclei

✍ Gang Wu; Scott Kroeker; Roderick E. Wasylishen; Robert G. Griffin 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 80 KB

Spin dynamics of exciton states in GaAS/

Spin dynamics of exciton states in GaAS/AlGaAs multiple quantum wells

✍ B. Dareys; X. Marie; T. Amand; J. Barrau; Y. Shekun; I. Razdobreev; R. Planel 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 195 KB

We report an experimental study of the excitonic spin relaxation dynamics in GaAs/AlGaAs Multiple Quantum Wells (MQW) presenting interface roughness by time and polarization resolved luminescence spectroscopy. The relaxation is found to occur mainly when the excitons are in the free state, before th

Multiple-quantum NMR dynamics in the qua

Multiple-quantum NMR dynamics in the quasi-one-dimensional distribution of protons in hydroxyapatite

✍ Gyunggoo Cho; James P. Yesinowski 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 501 KB

Mukiple-quantum NMR dynamics are reported for the quasi-one-dimensional distribution of uniformly spaced proton spins in hydroxyapatite, CLJ,(OH)(PO,)~, using a phase-incremented even-order selective time-reversal pulse sequence. The initial increase of the effective size N with the preparation time

Multiple-Quantum MAS NMR Spectroscopy of

Multiple-Quantum MAS NMR Spectroscopy of Spin-32Quadrupolar Spin Systems Using Shaped Pulses

✍ Shangwu Ding; Charles A McDowell 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 197 KB

An investigation of the effect of shaping the pulses in multiple-quantum magic-angle nuclear magnetic resonance experiments was carried out on polycrystalline samples containing spin-32 quadrupolar nuclear spins. Both theoretical analysis and numerical simulations show that there exist types of shap