scholarly journals Perturbative calculations of quantum spin tunneling in effective spin systems with a transversal magnetic field and transversal anisotropy

2017 ◽  
Vol 19 (1) ◽  
pp. 013032 ◽  
Author(s):  
M Krizanac ◽  
E Y Vedmedenko ◽  
R Wiesendanger
Keyword(s):  
Magnetic Field ◽  
Quantum Spin ◽  
Spin Systems ◽  
Perturbative Calculations ◽  
Effective Spin ◽  
Spin Tunneling ◽  
Transversal Magnetic

PULSE-FIELD EXPERIMENTS ON THE SPIN-LATTICE INTERACTION IN LOW-DIMENSIONAL SPIN SYSTEMS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3369-3372
Author(s):  
B. WOLF ◽  
S. ZHERLITSYN ◽  
S. SCHMIDT ◽  
B. LÜTHI ◽  
M. LANG
Keyword(s):  
Magnetic Field ◽  
Spin System ◽  
Field Experiments ◽  
Resonant Interaction ◽  
Quantum Spin ◽  
Spin Systems ◽  
Pulse Field ◽  
Quantum Spin System ◽  
Magnetic Excitations ◽  
Low Dimensional

Low-dimensional spin systems reveal new and unexpected physical phenomena such as distinct plateaus in the magnetization as a function of magnetic field. In this paper we present ultrasonic measurements for the quasi-two-dimensional spin system SrCu2(BO3)2 in magnetic fields up to 50 T. From this technique we obtained detailed information about the spin state, the magnetic excitations and their interaction with phonons. The dimerized quantum-spin system SrCu2(BO3)2 exhibits plateaus in the magnetization and shows surprisingly strong magneto-elastic effects as a function of temperature and magnetic field. The pronounced elastic anomalies indicate a resonant interaction between the sound wave and the magnetic excitations.

scholarly journals ESR studies of quantum spin systems using the pulsed magnetic field

2006 ◽  
Vol 51 ◽  
pp. 15-22 ◽  
Author(s):  
H Ohta ◽  
M Yoshida ◽  
S Okubo ◽  
T Ito ◽  
H Takagi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Spin ◽  
Spin Systems ◽  
Pulsed Magnetic Field ◽  
Quantum Spin Systems

scholarly journals Survival of itinerant excitations and quantum spin state transitions in YbMgGaO4 with chemical disorder

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
X. Rao ◽  
G. Hussain ◽  
Q. Huang ◽  
W. J. Chu ◽  
N. Li ◽  
...  
Keyword(s):  
Spin State ◽  
Magnetic Ordering ◽  
Temperature Limit ◽  
Quantum Spin ◽  
Spin Fluctuations ◽  
State Transitions ◽  
Spin Liquid ◽  
Magnetic Ground State ◽  
Effective Spin ◽  
Ideal System

AbstractA recent focus of quantum spin liquid (QSL) studies is how disorder/randomness in a QSL candidate affects its true magnetic ground state. The ultimate question is whether the QSL survives disorder or the disorder leads to a “spin-liquid-like” state, such as the proposed random-singlet (RS) state. Since disorder is a standard feature of most QSL candidates, this question represents a major challenge for QSL candidates. YbMgGaO4, a triangular lattice antiferromagnet with effective spin-1/2 Yb3+ions, is an ideal system to address this question, since it shows no long-range magnetic ordering with Mg/Ga site disorder. Despite the intensive study, it remains unresolved as to whether YbMgGaO4 is a QSL or in the RS state. Here, through ultralow-temperature thermal conductivity and magnetic torque measurements, plus specific heat and DC magnetization data, we observed a residual κ0/T term and series of quantum spin state transitions in the zero temperature limit for YbMgGaO4. These observations strongly suggest that a QSL state with itinerant excitations and quantum spin fluctuations survives disorder in YbMgGaO4.

scholarly journals Quantum Spin Systems at Positive Temperature

2006 ◽  
Vol 269 (3) ◽  
pp. 611-657 ◽  
Author(s):  
Marek Biskup ◽  
Lincoln Chayes ◽  
Shannon Starr
Keyword(s):  
Quantum Spin ◽  
Spin Systems ◽  
Positive Temperature ◽  
Quantum Spin Systems
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