FISDW in quasi-one dimensional organic conductors with the dimerized gap due to anion ordering

2002 ◽  
Vol 12 (9) ◽  
pp. 381-384
Author(s):  
N. Matsunaga ◽  
A. Ayari ◽  
P. Moncea ◽  
K. Yamashita ◽  
A. Ishikawa ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ground State ◽  
Quantum Hall ◽  
Organic Conductors ◽  
Hall Resistance ◽  
Cooling Rates ◽  
One Dimensional ◽  
Stable Quantum ◽  
New Phase ◽  
Quantum Hall State

Magnetoresistance and Hall resistance measurements have been carried out in the FISDW phase of deuterated (TMTSF)2C1O4 for various cooling rates through the anion ordering temperature. The Hall resistance in the intermediate cooled state, observed a very stable quantum Hall state above 9.0 T for slowly cooled, shows a step-like change from the phase between 10 and 17 T to the phase between 20 and 25 T with hysteresis between 14 and 21 T. This result suggests that there is a new phase transition around 15 T in deuterated (TMTSF)4ClO4. A possible ground state of the FISDW phase of (TMTSF)2C1O4 for various cooling rates is discussed from the viewpoint of the peculiar SDW nesting vector stabilized by the dimerized gap due to anion ordering.

QUANTUM PHASE TRANSITIONS AND ENTANGLEMENT IN J1–J2 MODEL

2004 ◽  
Vol 15 (08) ◽  
pp. 1095-1103 ◽  
Author(s):  
RECEP ERYIĞIT ◽  
RESUL ERYIĞIT ◽  
YIĞIT GÜNDÜÇ
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Phase Transitions ◽  
Ground State ◽  
Abrupt Change ◽  
Quantum Phase Transitions ◽  
Nearest Neighbors ◽  
Competing Interactions ◽  
One Dimensional ◽  
Transition Points

We study ground state pairwise entanglement within one-dimensional spin-1/2 antiferromagnetic J1–J2 model with competing interactions. Contrary to some claims we found that frustration does not increase entanglement. Concurrence of nearest and next nearest neighbors are found to show abrupt change at phase transition points. We also show that the concurrence can be used to classify the phase diagram of the model in anisotropy–frustration plane.

THE QUANTUM HALL EFFECT IN QUASI-ONE-DIMENSIONAL ORGANIC CONDUCTORS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3089-3089
Author(s):  
V. M. YAKOVENKO
Keyword(s):  
Hall Effect ◽  
Quantum Hall Effect ◽  
Quantum Hall ◽  
Organic Conductors ◽  
Temperature Evolution ◽  
Edge States ◽  
One Dimensional ◽  
Recent Developments ◽  
Theoretical Overview

Theoretical overview of the quantum Hall effect in quasi-one-dimensional (Q1D) organic conductors (TMTSF) 2 X will be presented.1 The emphasis will be on the recent developments, such as the temperature evolution of the Hall effect2,3 and the chiral edge states.4 Time permitting, a theory of the nonchiral electron edge states in a Q1D triplet superconductor5 and the holon edge states in the charge-gap regime6 will be presented too.

scholarly journals New Phase Transition between Partially and Fully Polarized Quantum Hall States with Charge and Spin Gaps atν=23

2001 ◽  
Vol 87 (13) ◽  
Author(s):  
N. Freytag ◽  
Y. Tokunaga ◽  
M. Horvatić ◽  
C. Berthier ◽  
M. Shayegan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Hall ◽  
Quantum Hall States ◽  
New Phase ◽  
Hall States

Possible quantum Hall effect in a magnetic-field-induced phase transition in the quasi-one-dimensional CDW organic conductor, HMTSF–TCNQ

2015 ◽  
Vol 460 ◽  
pp. 241-244 ◽  
Author(s):  
Keizo Murata ◽  
Yuhei Fukumoto ◽  
Keiichi Yokogawa ◽  
Woun Kang ◽  
Ryo Takaoka ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Hall Effect ◽  
Quantum Hall Effect ◽  
Quantum Hall ◽  
Organic Conductor ◽  
One Dimensional
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