scholarly journals Short range spin correlations in the CMR material La{sub 1.41}Sr{sub 1.6}Mn{sub 2}O{sub 7}

1997 ◽  
Author(s):  
T.M. Kelley ◽  
D.N. Argyriou ◽  
R.A. Robinson ◽  
H. Nakotte ◽  
J.F. Mitchell ◽  
...  
Keyword(s):  
Short Range ◽  
Spin Correlations

scholarly journals Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
E. Paris ◽  
C. W. Nicholson ◽  
S. Johnston ◽  
Y. Tseng ◽  
M. Rumo ◽  
...  
Keyword(s):  
Short Range ◽  
Degrees Of Freedom ◽  
Time Resolved ◽  
Model Calculations ◽  
Spin Correlations ◽  
Singlet Exciton ◽  
Magnetic Correlations ◽  
Local Lattice ◽  
Frustrated Systems ◽  
A Charge

AbstractInvestigations of magnetically ordered phases on the femtosecond timescale have provided significant insights into the influence of charge and lattice degrees of freedom on the magnetic sub-system. However, short-range magnetic correlations occurring in the absence of long-range order, for example in spin-frustrated systems, are inaccessible to many ultrafast techniques. Here, we show how time-resolved resonant inelastic X-ray scattering (trRIXS) is capable of probing such short-ranged magnetic dynamics in a charge-transfer insulator through the detection of a Zhang–Rice singlet exciton. Utilizing trRIXS measurements at the O K-edge, and in combination with model calculations, we probe the short-range spin correlations in the frustrated spin chain material CuGeO3 following photo-excitation, revealing a strong coupling between the local lattice and spin sub-systems.

scholarly journals Short-range Berezinskii-Kosterlitz-Thouless Phase Characterization for the q-state Clock Model

2021 ◽  
Author(s):  
Oscar Andres Negrete ◽  
Patricio Vargas ◽  
Francisco Jose Peña ◽  
Gonzalo Saravia ◽  
Eugenio Emilio Vogel
Keyword(s):  
Short Range ◽  
Nearest Neighbors ◽  
Vortex State ◽  
Spin Systems ◽  
Xy Model ◽  
Clock Model ◽  
Spin Correlations ◽  
Vortex States ◽  
Higher Temperature ◽  
Phase Characterization

Beyond the usual ferromagnetic and paramagnetic phases present in spin systems, the usual q-state clock model, presents an intermediate vortex state when the number of possible orientations q for the system is equal to 5 or larger. Such vortex states give rise to the Berezinskii-Kosterlitz-Thouless (BKT) phase present up to the XY model in the limit q→∞. Based on information theory, we present here an analysis of the classical order parameters plus new short-range parameters defined here. Thus, we show that even using the first nearest neighbors spin-spin correlations only, it is possible to distinguish the two transitions presented by this system for q greater than or equal to 5. Moreover, the appearance at relatively low temperature and disappearance of the BKT phase at a rather fix higher temperature is univocally determined by the short-range interactions recognized by the information content of classical and new parameters.

Short-range quasistatic order and critical spin correlations in α−Ru1−xIrxCl3

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Seung-Hwan Do ◽  
W.-J. Lee ◽  
S. Lee ◽  
Y. S. Choi ◽  
K.-J. Lee ◽  
...  
Keyword(s):  
Short Range ◽  
Spin Correlations

A study of short-range spin correlations in Yb monopnictides

1998 ◽  
Vol 177-181 ◽  
pp. 339-340 ◽  
Author(s):  
K. Ohoyama ◽  
M. Kohgi ◽  
K. Hashi ◽  
A. Oyamada ◽  
T. Suzuki
Keyword(s):  
Short Range ◽  
Spin Correlations

scholarly journals Pseudogap induced by short-range spin correlations in a doped Mott insulator

2006 ◽  
Vol 73 (16) ◽  
Author(s):  
B. Kyung ◽  
S. S. Kancharla ◽  
D. Sénéchal ◽  
A.-M. S. Tremblay ◽  
M. Civelli ◽  
...  
Keyword(s):  
Short Range ◽  
Mott Insulator ◽  
Spin Correlations ◽  
Doped Mott Insulator

scholarly journals New Insights about CuO Nanoparticles from Inelastic Neutron Scattering

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 312 ◽  
Author(s):  
Elinor Spencer ◽  
Alexander Kolesnikov ◽  
Brian Woodfield ◽  
Nancy Ross
Keyword(s):  
Particle Size ◽  
Neutron Scattering ◽  
Short Range ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Cuo Nanoparticles ◽  
Spin Correlations ◽  
Size Dependent ◽  
Dynamic Spin ◽  
Insight Into

Inelastic Neutron Scattering (INS) spectroscopy has provided a unique insight into the magnetodymanics of nanoscale copper (II) oxide (CuO). We present evidence for the propagation of magnons in the directions of the ordering vectors of both the commensurate and helically modulated incommensurate antiferromagnetic phases of CuO. The temperature dependency of the magnon spin-wave intensity (in the accessible energy-range of the experiment) conforms to the Bose population of states at low temperatures (T ≤ 100 K), as expected for bosons, then intensity significantly increases, with maximum at about 225 K (close to TN), and decreases at higher temperatures. The obtained results can be related to gradual softening of the dispersion curves of magnon spin-waves and decreasing the spin gap with temperature approaching TN on heating, and slow dissipation of the short-range dynamic spin correlations at higher temperatures. However, the intensity of the magnon signal was found to be particle size dependent, and increases with decreasing particle size. This “reverse size effect” is believed to be related to either creation of single-domain particles at the nanoscale, or “superferromagnetism effect” and the formation of collective particle states.

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