Indications for the coexistence of closed orbit and quantum interferometer with the same cross section in the organic metal β′′-(ET)4(H3O)[ Fe(C2O4)3] .C6H4Cl2: persistence of Shubnikov-de Haas oscillations above 30 K

Vignolles, David; Audouard, Alain; Laukhin, V. N.; Canadell, Enric; Prokhorova, Tatiana G.; Yagubskii, Eduard B.

doi:10.1140/epjb/e2009-00306-1

Cited by 6 publications

(7 citation statements)

References 23 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Effective Landé factor as low as g * = 1.5 ÷ 1.6 are reported for the strongly correlated compound κ-(ET) 2 Cu(NCS) 2[5], nevertheless g * = 2 is consistent with data of other ET salts[17,18].…”

supporting

confidence: 77%

Quantum oscillations in the linear chain of coupled orbits: the organic metal with two cation layers theta-(ET)(4)CoBr(4)(C(6)H(4)Cl(2))

Audouard,

Fortin,

Vignolles

et al. 2011

Preprint

View full text Add to dashboard Cite

Analytical formulae for de Haas-van Alphen (dHvA) oscillations in linear chain of coupled two-dimensional (2D) orbits (Pippard's model) are derived systematically taking into account the chemical potential oscillations in magnetic field. Although corrective terms are observed, basic (α) and magnetic breakdown-induced (β and 2βα) orbits can be accounted for by the Lifshits-Kosevich (LK) and Falicov-Stachowiak semiclassical models in the explored field and temperature ranges. In contrast, the 'forbidden orbit' βα amplitude is described by a non-LK equation involving a product of two classical orbit amplitudes. Furthermore, strongly non-monotonic field and temperature dependence may be observed for the second harmonics of basic frequencies such as 2α and the magnetic breakdown orbit β + α, depending on the value of the spin damping factors. These features are in agreement with the dHvA oscillation spectra of the strongly 2D organic metal θ-(ET)4CoBr4(C6H4Cl2).Introduction. -Quasi-two-dimensional (q-2D) multiband organic compounds (ET) 2 X (where ET stands for the bis-ethylenedithio-tetrathiafulvalene molecule and X is a monovalent anion) exhibit very rich phase diagrams with ground states ranging from antiferromagnetic insulator to Fermi liquid. In particular, superconducting and magnetic ordered phases are observed close to each other which is reminiscent of cuprates and iron-based superconductors (for a recent review, see [1] and references therein). These compounds share the same Fermi surface (FS) topology which is an illustration of the linear chain of coupled orbits introduced by Pippard in the early sixties [2]. Such FS is liable to give rise to a network of orbits coupled by magnetic breakdown (MB) in large magnetic fields. Quantum oscillations in such systems have been extensively studied during the two last decades (for a review, see e.g. [3] and references therein). The main feature of the oscillation spectra of these comp-1

show abstract

supporting

confidence: 77%

Quantum oscillations in the linear chain of coupled orbits: the organic metal with two cation layers theta-(ET)(4)CoBr(4)(C(6)H(4)Cl(2))

Audouard,

Fortin,

Vignolles

et al. 2011

Preprint

View full text Add to dashboard Cite

show abstract

“…In such a case, 3 Fourier components linked by a linear combination settled by the orbits compensation, F b = Fa + F b−a , should be observed. This picture holds, not only for the above compound under pressure for which F3 = F1 + F2 within the error bars, but also for (NH4, Fe, C3H7NO) in the applied pressure range from ambient pressure to 1 GPa [37,38] and for (H3O, Fe, C6H4Cl2) [33,34,39].…”

Section: Puzzling Oscillations Spectrasupporting

confidence: 59%

“…2(c). Keeping in mind that dHvA oscillations are only sensitive to the density of states, it has been shown that both the field and temperature dependence of the b oscillations are consistently accounted for by the coexistence of a closed b orbit and a quantum interferometer with the same cross section [33,34,39]. Unfortunately, existence of a QI path is not consistent with the FS of Fig.…”

Section: Puzzling Oscillations Spectramentioning

confidence: 93%

Organic conductors in high magnetic fields: Model systems for quantum oscillation physics

Audouard

Fortin

2012

Comptes Rendus. Physique

View full text Add to dashboard Cite

International audienceEven although organic conductors have complicated crystalline structures with low symmetry and large unit cells, band structure calculations predict a multiband quasi-two-dimensional electronic structure yielding a very simple Fermi surface in most cases. Although few puzzling experimental results have been observed, data for numerous compounds are in agreement with calculations, which make them suitable systems for studying magnetic quantum oscillations in networks of orbits connected by magnetic breakdown. The state of the art of these problematics is reviewed

show abstract

“…2 and Ref. 18). For a given magnetic field, the temperature dependence of the oscillation amplitude can be written (see Eqs.…”

Section: Resultsmentioning

confidence: 99%

Magnetoresistance oscillations up to 32 K in the organic metal β″-(ET)4(H3O)[Fe(C2O4)3] · C6H4Cl2

Laukhin

Audouard

Vignolles

et al. 2011

Low Temperature Physics

View full text Add to dashboard Cite

The magnetic torque and magnetoresistance of the quasi-two-dimensional charge transfer salt β″-(ET)4(H3O)[Fe(C2O4)3] · C6H4Cl2 have been investigated in pulsed magnetic fields of up to 55 T. As opposed to de Haas–van Alphen oscillations, Shubnikov–de Haas oscillations are observed up to temperatures as high as 32 K at ambient pressure despite significant thermal damping in the low-temperature range. This feature, which is also observed under applied pressure, is interpreted in terms of the coexistence of a closed orbit and a quantum interference path with the same cross section.

show abstract

Indications for the coexistence of closed orbit and quantum interferometer with the same cross section in the organic metal β′′-(ET)4(H3O)[ Fe(C2O4)3] .C6H4Cl2: persistence of Shubnikov-de Haas oscillations above 30 K

Cited by 6 publications

References 23 publications

Quantum oscillations in the linear chain of coupled orbits: the organic metal with two cation layers theta-(ET)(4)CoBr(4)(C(6)H(4)Cl(2))

Quantum oscillations in the linear chain of coupled orbits: the organic metal with two cation layers theta-(ET)(4)CoBr(4)(C(6)H(4)Cl(2))

Organic conductors in high magnetic fields: Model systems for quantum oscillation physics

Magnetoresistance oscillations up to 32 K in the organic metal β″-(ET)4(H3O)[Fe(C2O4)3] · C6H4Cl2

Contact Info

Product

Resources

About