The phase diagram of TTF-TCNQ under pressure

作者: C. Hartzstein , V. Zevin , M. Weger

DOI: 10.1016/0038-1098(80)90384-1

关键词: Condensed matter physicsPeriod (periodic table)Phase diagramTransverse planeSign (mathematics)Plane (geometry)Turn (geometry)Phase transitionPressure dependenceChemistry

摘要: Abstract It is shown that the CDW-CDW interaction between TTF and TCNQ chains in TTF-TCNQ has a drastic pressure dependence changing its sign approximately at 5 kbar. This determines form of phase transition curves on T-P plane which turn out to be very similar those observed experimentally. The recent experiments Megtert et al. established existence region where both systems are ordered with transverse period equal 2 , may explained by means this interchain together CDW-impurity interaction.

参考文章(10)
M. Weger, J. Friedel, Addendum - A landau theory for the displacive phase transitions in TTF-TCNQ Journal De Physique. ,vol. 38, pp. 881- 882 ,(1977) , 10.1051/JPHYS:01977003807088100
G.A Toombs, Quasi-one-dimensional conductors Physics Reports. ,vol. 40, pp. 181- 240 ,(1978) , 10.1016/0370-1573(78)90149-7
C. Hartzstein, V. Zevin, M. Weger, Landau theory of phase transitions in TTF-TCNQ Journal de Physique. ,vol. 41, pp. 677- 699 ,(1980) , 10.1051/JPHYS:01980004107067700
R. Comès, G. Shirane, S. M. Shapiro, A. F. Garito, A. J. Heeger, Elastic-neutron-scattering study of the phase transitions in tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) Physical Review B. ,vol. 14, pp. 2376- 2383 ,(1976) , 10.1103/PHYSREVB.14.2376
S. Megtert, R. Comès, C. Vettier, R. Pynn, A.F. Garito, Elastic neutron scattering evidence for a charge transfer change in TTF-TCNQ (tetrathiofulvalene tetracyanoquinodimethane) at high pressure Solid State Communications. ,vol. 31, pp. 977- 980 ,(1979) , 10.1016/0038-1098(79)90012-7
W. L. McMillan, Landau theory of charge-density waves in transition-metal dichalcogenides Physical Review B. ,vol. 12, pp. 1187- 1196 ,(1975) , 10.1103/PHYSREVB.12.1187
D. Cline, F. Halzen, J. Luthe, High-transverse-momentum secondaries and rising total cross sections in cosmic-ray interactions Physical Review Letters. ,vol. 31, pp. 491- 494 ,(1973) , 10.1103/PHYSREVLETT.31.491
M. Weger, J. Friedel, A landau theory for the displacive phase transitions in TTF-TCNQ Journal De Physique. ,vol. 38, pp. 241- 258 ,(1977) , 10.1051/JPHYS:01977003802024100