Magnetic field studies of the peculiar electronic state in the a-(BEDT-TTF)2MHg(SCN)4 family

Abstract Magnetoresistance anomalies exhibited by the members of the α-(BEDT-TTF) 2 MHg(SCN) 4 family with M=Tl, K and Rb are reviewed in connection with possible modification of their electronic structure at low temperatures. Special attention is paid to angular magnetoresistance oscillations (AMRO). The analysis of the AMRO behavior at various temperatures and magnetic fields, both below and above the phase transition temperature, enables us to get an important information about changes in the electronic band structure at the phase transition. Other peculiarities of both semi-classical magnetoresistance and quantum oscillations are discussed within the proposed model of the low-temperature state of these compounds.

[1]  Miura,et al.  Resonance effect in magnetotransport anisotropy of quasi-one-dimensional conductors. , 1992, Physical review. B, Condensed matter.

[2]  W. Kwok,et al.  A new ambient-pressure organic superconductor: (BEDT-TTF)2(NH4)Hg(SCN)4 , 1990 .

[3]  Howe,et al.  Novel interplay of Fermi-surface behavior and magnetism in a low-dimensional organic conductor. , 1992, Physical review letters.

[4]  Maki.  Lebed resonance in quasi-one-dimensional organic conductors. , 1992, Physical review. B, Condensed matter.

[5]  M. Tokumoto,et al.  Direct Observation of Spin-Splitting of the Shubnikov- de Haas Oscillations in a Quasi-Two-Dimensional Organic Conductor (BEDT-TTF)2KHg(SCN)4 , 1990 .

[6]  Sasaki,et al.  Anisotropic galvanomagnetic effect in the quasi-two-dimensional organic conductor alpha -(BEDT-TTF)2KHg(SCN)4, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene. , 1994, Physical review. B, Condensed matter.

[7]  Takahiko Sasaki,et al.  Magnetic phase diagram of the organic conductor α-(BEDT-TTF)2KHg(SCN)4 , 1992 .

[8]  M. Tokumoto,et al.  Transport properties of organic conductor (BEDT-TTF)2KHg(SCN)4: I. Resistance and magnetoresistance anomaly , 1990 .

[9]  A. Kovalev,et al.  Quantum and semi-classical magnetoresistance oscillations in a new organic metal (BEDT-TTF)2T1Hg(SeCN)4 , 1993 .

[10]  R. Shibaeva,et al.  Angular magnetoresistance oscillations in the organic conductor α-(ET)2KHg(SCN)4 above and below the phase transition , 1994 .

[11]  V. Laukhin,et al.  Resistance and magnetoresistance anomaly in a new stable organic metal (ET)2TlHg(SCN)4 , 1992 .

[12]  Miura,et al.  High-field magnetotransport and Fermi-surface topology in the novel quasi-two-dimensional organic conductor bis(ethylenedithiolo)tetrathiafulvalenium mercuric postassium thiocyanate, (BEDT-TTF)2KHg(SCN)4. , 1990, Physical review. B, Condensed matter.

[13]  T. Janssen,et al.  Magnetotransport and Fermi-surface topology of [bis(ethylenedithio)tetrathiafulvalene]2KHg(SCN)4 , 1992 .

[14]  M. Tokumoto,et al.  Magnetic breakdown in the organic conductor (BEDT-TTF)2KHg(SCN)4 , 1993 .

[15]  Hatsumi Mori,et al.  The Origin of Anomalous Angular Dependent Magnetoresistance Oscillation Effect in α-(BEDT-TTF)2KHg(SCN)4 , 1994 .

[16]  Hatsumi Mori,et al.  Crystal and electronic structures of (BEDT-TTF)2(MHg(SCN)4)(M=K and NH4). , 1990 .

[17]  Y. Maruyama,et al.  Electrical properties and crystal structures of mercury (II) thiocyanate salts based upon BEDTTTF with Li+, K+, NH+4, Rb+, and Cs+ , 1990 .

[18]  T. Osada,et al.  A novel electronic state in (BEDT-TTF)2XHg(SCN)4; X=K, NH4 , 1993 .