Phase diagram for large two-dimensional bipolarons in a magnetic field

1998 ◽  
Vol 57 (17) ◽  
pp. 10569-10575 ◽  
Author(s):  
Wilson B. da Costa ◽  
François M. Peeters
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Two Dimensional

scholarly journals Universal behavior of the bosonic metallic ground state in a two-dimensional superconductor

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Zhuoyu Chen ◽  
Bai Yang Wang ◽  
Adrian G. Swartz ◽  
Hyeok Yoon ◽  
Yasuyuki Hikita ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Quantum Phase Transitions ◽  
Metallic State ◽  
Two Dimensional ◽  
Metallic Behavior ◽  
Universal Behavior ◽  
Hall Resistivity ◽  
Wide Range ◽  
Metal State

AbstractAnomalous metallic behavior, marked by a saturating finite resistivity much lower than the Drude estimate, has been observed in a wide range of two-dimensional superconductors. Utilizing the electrostatically gated LaAlO3/SrTiO3 interface as a versatile platform for superconductor-metal quantum phase transitions, we probe variations in the gate, magnetic field, and temperature to construct a phase diagram crossing from superconductor, anomalous metal, vortex liquid, to the Drude metal state, combining longitudinal and Hall resistivity measurements. We find that the anomalous metal phases induced by gating and magnetic field, although differing in symmetry, are connected in the phase diagram and exhibit similar magnetic field response approaching zero temperature. Namely, within a finite regime of the anomalous metal state, the longitudinal resistivity linearly depends on the field while the Hall resistivity diminishes, indicating an emergent particle-hole symmetry. The universal behavior highlights the uniqueness of the quantum bosonic metallic state, distinct from bosonic insulators and vortex liquids.

Phase Transition in 2D Anisotropic Ising Model with Next-Nearest Neighbor Interactions in a Magnetic Field

SPIN ◽  
2018 ◽  
Vol 08 (03) ◽  
pp. 1850010
Author(s):  
D. Farsal ◽  
M. Badia ◽  
M. Bennai
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Phase Diagram ◽  
Monte Carlo ◽  
Magnetic Susceptibility ◽  
Critical Temperature ◽  
Ising Model ◽  
Nearest Neighbor ◽  
Two Dimensional ◽  
The Magnetic Field

The critical behavior at the phase transition of the ferromagnetic two-dimensional anisotropic Ising model with next-nearest neighbor (NNN) couplings in the presence of the field is determined using mainly Monte Carlo (MC) method. This method is used to investigate the phase diagram of the model and to verify the existence of a divergence at null temperature which often appears in two-dimensional systems. We analyze also the influence of the report of the NNN interactions [Formula: see text] and the magnetic field [Formula: see text] on the critical temperature of the system, and we show that the critical temperature depends on the magnetic field for positive values of the interaction. Finally, we have investigated other thermodynamical qualities such as the magnetic susceptibility [Formula: see text]. It has been shown that their thermal behavior depends qualitatively and quantitatively on the strength of NNN interactions and the magnetic field.

Phase diagram of the two-dimensional quantum antiferromagnet in a magnetic field

2006 ◽  
Vol 99 (8) ◽  
pp. 08H503 ◽  
Author(s):  
Alessandro Cuccoli ◽  
Giacomo Gori ◽  
Ruggero Vaia ◽  
Paola Verrucchi
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Two Dimensional ◽  
Quantum Antiferromagnet

MAGNETIC PHASE DIAGRAM IN FIELD INDUCED SUPERCONDUCTORS λ-(BETS)2FexGa1-xCl4

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3084-3088
Author(s):  
S. UJI ◽  
C. TERAKURA ◽  
T. TERASHIMA ◽  
T. YAKABE ◽  
Y. IMANAKA ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Magnetic Phase ◽  
Electronic States ◽  
Magnetic Phase Diagram ◽  
Internal Field ◽  
Organic Conductors ◽  
High Magnetic Fields ◽  
Two Dimensional ◽  
Global Phase Diagram

Electronic states have been investigated under high magnetic fields for quasi-two-dimensional organic conductors λ- (BETS) 2 Fe x Ga 1-x Cl 4 (x = 1.0, 0.47, 0.45, 0). Under magnetic field parallel to the c-axis, various electronic states appear, depending on x, field, and temperature. The global phase diagram for this alloy is presented and the evidence of the strong internal field due to the Fe moments is shown.

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