TY - JOUR
T1 - High-field phase transitions and Fermi surfaces in the organic conductor α-(BEDT-TTF)2KHg(SCN)4
T2 - Influence of the magnetic breakdown on evaluation of the effective mass and the scattering time
AU - Sasaki, T.
AU - Biberacher, W.
AU - Fukase, T.
N1 - Funding Information:
The authors would like to thank K. Andres, M. Kartsovnik and P. Christ for stimulating discussions and critical readings. This work was partially supported by a Grant-in-Aid for Scientific Research, from the Ministry of Education, Science, and Culture, Japan.
PY - 1998/5/29
Y1 - 1998/5/29
N2 - The change of the de Haas-van Alphen (dHvA) oscillation between the low-field spin-density-wave (SDW) phase and the high-field (H ≥ 23 T) metallic phase of the organic conductor α-(BEDT-TTF)2KHg(SCN)4 is explained in terms of a model of the magnetic breakdown (MB) and a reconstructed Fermi surface by SDW. On the reconstructed Fermi surface, the scattering time obtained by fitting the standard Lifshitz-Kosevich formulation to the dHvA oscillations is affected by the MB giving the additional field-dependent effect. Furthermore, the evaluation of the effective mass needs to consider the additional temperature-dependent factor being due to the MB gap which may change intrinsically and/or thermally with temperature.
AB - The change of the de Haas-van Alphen (dHvA) oscillation between the low-field spin-density-wave (SDW) phase and the high-field (H ≥ 23 T) metallic phase of the organic conductor α-(BEDT-TTF)2KHg(SCN)4 is explained in terms of a model of the magnetic breakdown (MB) and a reconstructed Fermi surface by SDW. On the reconstructed Fermi surface, the scattering time obtained by fitting the standard Lifshitz-Kosevich formulation to the dHvA oscillations is affected by the MB giving the additional field-dependent effect. Furthermore, the evaluation of the effective mass needs to consider the additional temperature-dependent factor being due to the MB gap which may change intrinsically and/or thermally with temperature.
KW - De Haas-van Alphen oscillation
KW - Effective mass
KW - Organic conductor
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U2 - 10.1016/S0921-4526(97)00921-6
DO - 10.1016/S0921-4526(97)00921-6
M3 - Article
AN - SCOPUS:0032064182
VL - 246-247
SP - 303
EP - 306
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -