scholarly journals Ultra-fast photo-carrier relaxation in Mott insulators with short-range spin correlations

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Martin Eckstein ◽  
Philipp Werner
Keyword(s):  
Short Range ◽  
Mott Insulators ◽  
Carrier Relaxation ◽  
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 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
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