Two-dimensional organic metals θ-(BETS)4MBr4(PhBr), M=Cd, Hg with differently oriented conducting layers

Zhilyaeva, E. I.; Bogdanova, O. Yu.; Шилов, Г. В.; Lyubovskiǐ, R. B.; Pesotskiǐ, S. I.; Алдошин, С. М.; Kobayashi, Akiko; Kobayashi, Hayao; Lyubovskaya, Rimma N.

doi:10.1016/j.synthmet.2009.01.028

Cited by 12 publications

(22 citation statements)

References 11 publications

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“…For all the BETS‐based conductors, metallic behavior of the in‐plane resistivity ( R ∥ ) down to around 4.3 K and semiconducting growth of the interlayer resistivity ( R ⟂ ) were observed with decreasing temperature 33,35,39–42. For BETS 4 HgBr 4 (C 6 H 5 Cl), the metallic behavior of R ∥ changed to semiconducting behavior at T = 246 K (Figure 1),33 which at T 2 = 240 K transformed again to metallic behavior.…”

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

“…For BETS 4 HgBr 4 (C 6 H 5 Cl), the metallic behavior of R ∥ changed to semiconducting behavior at T = 246 K (Figure 1),33 which at T 2 = 240 K transformed again to metallic behavior. For (BETS) 4 MBr 4 (C 6 H 5 Br) (M = Cd, Hg; Figure 2, a),42 the metallic behavior of R ∥ changed to semiconducting behavior at T = 230 K, which at T 2 = 225 K transformed again to a metallic state. The temperature interval between these two metallic states increased with the cooling rate (Figure 1, onset, v 1 = 0.3 K/min, v 2 = 0.6 K/min, v 3 = 7.0 K/min) and a hysteresis was observed.…”

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

“…The position of the crossover peak depends on the quality of the crystal. For comparison, nonmetallic behavior of R ⟂ in the C 6 H 5 X‐containing BETS salts is observed down to liquid helium temperature 33,42…”

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

“… Temperature dependence of the intra‐ and interlayer relative electrical resistivities of (a) (BETS) 4 HgBr 4 (C 6 H 5 Br) [Reprinted from ref 42. with permission from Elsevier.…”

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

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Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Lyubovskaya¹,

Zhilyaeva²,

Шилов³

et al. 2014

Eur J Inorg Chem

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We have prepared a series of BEDT‐TTF or BETS‐based radical‐cation salts (D)4MBr4(C6H6–nXn) with tetrahedral anions [MIIBr4]2– (D = BETS, BEDT‐TTF; X = F, Cl, Br; n = 1, 2). The salts (D)4MBr4(C6H6–nXn) are characterized by the different structures of neighboring conducting layers, structural phase transitions, and different types of conductivity, namely, metallic and semiconducting, along and across the conducting layers, respectively. The Fermi surface of the metallic layer of (D)4MBr4(C6H6–nXn) with alternating crystallographically different conducting layers (dual‐layered salts) provides a roadmap for interpreting the transport properties of quasi‐two‐dimensional organic conductors. This review reports on the structures of these compounds, the effect of MBr4 anions and solvent on the occurrence of phase transitions, different Fermi surface topologies in connection with the different structures of neighboring conducting layers, and the possibility of the incoherent transport of charge carriers in such systems.

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Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

“… Temperature dependence of the intra‐ and interlayer relative electrical resistivities of (a) (BETS) 4 HgBr 4 (C 6 H 5 Br) [Reprinted from ref 42. with permission from Elsevier.…”

Section: Conducting Properties Of (D)4mbr4(c6h6–nxn)mentioning

confidence: 99%

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Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Lyubovskaya¹,

Zhilyaeva²,

Шилов³

et al. 2014

Eur J Inorg Chem

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“…However, among the radical cation salts with the stacked structure of the con ducting layer, several compounds are known, for which the orientations of stacks in the adjacent conducting layers are different: these are the superconductors β″ (ET) 4 13 , the semiconductor (TMTSF) 3 [Y(NO 3 ) 5 ] 2 (PhCl) 14 (TMTSF is tetramethyl tetraselenafulvalene, Y is ittrium), the organic metals (BETS) 4 MBr 4 (PhX) 15, 16 , and the conductors with the composition α β″ (ET) 4 17 (Solv is PhNMeCHO, PhCH 2 CN, PhCOMe) and β´ θ (ET) 2 [C(SO 2 CF 3 ) 3 ] characterizing by the transition metal-in sulator at 150-180 K. 18 In the latter case, the stacks from the adjacent layers differ in both the orientation and structure.…”

mentioning

confidence: 99%

Molecular conductors with differently oriented conducting layers, (EDT-TTF)3Hg2Br6 and (TMBEDT-TTF)5Hg(SCN)4-xIx

et al. 2010

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New conducting radical cation salts (EDT TTF) 3 Hg 2 Br 6 , (TMET) 5 Hg(SCN) 4-x I x (x ≈ 0.35), and (EDT TTF) 3 Hg(SCN) 3 I 0.5 (PhCl) 0.5 were synthesized. Their conductivities, ESR and polarized reflectance spectra were studied. It was shown that the organic conductors with differently oriented conducting layers (EDT TTF) 3 Hg 2 Br 6 and (TMET) 5 Hg(SCN) 4-x I x (x ≈ 0.35) are characterized by the quasi one dimensional character of electron motion. The conductivity along and across conducting layers has a semiconductive character. It was estab lished by ESR and polarized reflectance spectroscopy that the properties of such conductors are a superposition of the properties of individual conducting layers.Molecular conductors based on radical cation salts are widely investigated in recent decades. On cooling, many of these compounds exhibit metallic properties and un dergo phase transitions into the superconducting or di electric state. 1,2 Their structures and properties strongly depend on counterions that determine the character of the radical cation salts. The mercury containing anions with the halogen, thiocyanate, and mixed type ligands with diverse compositions and structures are used as counter ions. A whole class of low dimensional molecular con ductors based on the radical cation salts with the mercury containing metal complexes as anions has arisen. 3,4The radical cation salts with the thiocyanatomercu rate anions with the composition (ET) x MHg(SCN) 4 (ET is bis(ethylenedithio)tetrathiafulvalene, M is a monovalent cation), depending on the nature of the cation M, are characterized by a wide range of electroconducting properties, from semicon ducting to superconducting ones (see Ref. 4 and refer ences cited therein). The crystals of molecular conductors with the mixed halogenothiocyanatomercurate anions (ET) 2 Hg(SCN) 3-n X n (X = F, Cl, Br, I) undergo the phase transitions of the type metal-insulator upon lowering of temperature. 3 Among the radical cation salts with the halogenomercurate anions, there are superconductors (ET) 4

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Metallic Bi‐ and Monolayered Radical Cation Salts Based on Bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) with the Tris(oxalato)gallate Anion

et al. 2014

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New metallic triclinic (1) and monoclinic (2) crystals of the (BEDT‐TTF)4AI[MIII(C2O4)3]G family of organic molecular conductors have been prepared: α‐“pseudo‐κ”‐(BEDT‐TTF)4Kx(H3O)1–x[GaIII(C2O4)3]·1,2‐C6H4Br2 (x ≈ 0.45) (1) and β″‐(BEDT‐TTF)4Kx(H3O)1–x[GaIII(C2O4)3]·PhBr (x ≈ 0.33) (2). The triclinic crystals belong to a quite rare type of bilayered radical ion salts and contain alternating BEDT‐TTF layers with two distinct packing motifs (α‐ and “pseudo‐κ”). The monoclinic crystals contain one kind of BEDT‐TTF radical cation layers. The crystal structure, transport, and magnetotransport properties of 1 and 2 have been studied. The Shubnikov–de Haas (SdH) oscillations were found in both phases. The structure and properties of 1 and 2 are compared with another similar phase with M = FeIII.

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Two-dimensional organic metals θ-(BETS)4MBr4(PhBr), M=Cd, Hg with differently oriented conducting layers

Cited by 12 publications

References 11 publications

Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Molecular conductors with differently oriented conducting layers, (EDT-TTF)3Hg2Br6 and (TMBEDT-TTF)5Hg(SCN)4-xIx

Metallic Bi‐ and Monolayered Radical Cation Salts Based on Bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) with the Tris(oxalato)gallate Anion

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Two-dimensional organic metals θ-(BETS)4MBr4(PhBr), M=Cd, Hg with differently oriented conducting layers

Cited by 12 publications

References 11 publications

Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Dual‐Layered Quasi‐Two‐Dimensional Organic Conductors with Presumable Incoherent Electron Transport

Molecular conductors with differently oriented conducting layers, (EDT-TTF)3Hg2Br6 and (TMBEDT-TTF)5Hg(SCN)4-xIx

Metallic Bi‐ and Monolayered Radical Cation Salts Based on Bis(ethylenedithio)­tetrathiafulvalene (BEDT‐TTF) with the Tris(oxalato)gallate Anion

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Metallic Bi‐ and Monolayered Radical Cation Salts Based on Bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) with the Tris(oxalato)gallate Anion