Competing types of quantum oscillations in the two-dimensional organic conductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mi mathvariant="normal">B</mml:mi><mml:mi mathvariant="normal">E</mml:mi><mml:mi mathvariant="normal">D</mml:mi><mml:mi mathvariant="normal">T</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">T</mml:mi><mml:mi mathvariant="normal">T</mml:mi><mml:mi mathvariant="normal">F</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo>

Proust, Cyril; Audouard, Alain; Brossard, L.; Pesotskiǐ, S. I.; Lyubovskiǐ, R. B.; Lyubovskaya, Rimma N.

doi:10.1103/physrevb.65.155106

Cited by 29 publications

(47 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to band structure calculations [9], its FS is composed of two compensated orbits labelled a in the following with an area of 13 % of the FBZ area. Shubnikov-de Haas (SdH) oscillations spectra of this compound [10], which otherwise exhibit many frequency combinations, as discussed below, are in good agreement with this picture since the main Fourier component has a frequency F a = 241.5 ± 2 T that corresponds to 11 % of the FBZ area. This is also the case of the isostructural compound (ET) 8 [Hg 4 Cl 12 (C 6 H 5 Br)] 2 , noted hereafter as (Cl, Br), which has been even more extensively studied at high magnetic field [11,12] although its FS has not been reported up to now.…”

Section: Introductionsupporting

confidence: 58%

“…Alternatively, electron correlations have been invoked in order to account for such resistance behaviour [22,28]. As a matter of fact, a T sponds to a MB orbit while the b frequency corresponds to QI paths involving an area equal to that of the FBZ (F b = 2F a + F δ + F ∆ ) [10,11]. At high field and (or) high pressure, shift of few frequency combinations (such as 4a + δ or ∆ -δ) that could as well correspond to additional frequencies can be observed in Figs.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Shubnikov-de Haas oscillations spectrum of the strongly correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)2] under pressure

et al. 2008

View full text Add to dashboard Cite

In addition to a strong decrease of the magnetic breakdown field and effective masses, the latter being likely due to a reduction of the strength of electron correlations, a sizeable increase of the scattering rate is observed as the applied pressure increases. This latter point, which is at variance with data of most charge transfer salts is discussed in connection with pressure-induced features of the temperature dependence of the zero-field interlayer resistance.

show abstract

Section: Introductionsupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Shubnikov-de Haas oscillations spectrum of the strongly correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)2] under pressure

et al. 2008

View full text Add to dashboard Cite

show abstract

“…When they are observed in SdH spectra of κ-phase salts [3,4] and of other organic met-als [9] or layered semiconductor structures [10] with similar FS, these latter combination frequencies can be accounted for by quantum interference (QI). Nevertheless, as also pointed out in the case of organic metals whose FS constitutes a network of coupled electron and hole orbits [11], MB-induced LL broadening and (or) chemical potential oscillation as well as dimensionality certainly play a role in the SdH oscillatory spectra.…”

Section: Introductionmentioning

confidence: 72%

Analytical treatment of the de Haas–van Alphen frequency combination due to chemical potential oscillations in an idealized two-band Fermi liquid

2005

Self Cite

View full text Add to dashboard Cite

de Haas-van Alphen oscillation spectrum is studied for an idealized two-dimensional Fermi liquid with two parabolic bands in the case of canonical (fixed number of quasiparticles) and grand canonical (fixed chemical potential) ensembles. As already reported in the literature, oscillations of the chemical potential in magnetic field yield frequency combinations that are forbidden in the framework of the semiclassical theory. Exact analytical calculation of the Fourier components is derived at zero temperature and an asymptotic expansion is given for the high temperature and low magnetic field range. A good agreement is obtained between analytical formulae and numerical computations.

show abstract

“…1a and Ref. [6]), has been considered [7][8][9]. Contrary to the β-(ET) 2 IBr 2 salt whose oscillatory spectra exhibit either additional slow oscillations or beatings due to a significantly warped FS [10], the above compounds are strongly 2D [7].…”

mentioning

confidence: 99%

“…The MB orbits and QI paths liable to be involved in the oscillatory spectra are described in Refs. [8,9]. The Fourier spectra of the oscillatory MR have been analyzed on the basis of the Falicov and Stachowiak model [11] which assumes that the effective mass of a given MB orbit is the sum of the effective masses of each of its components.…”

mentioning

confidence: 99%

Magnetic oscillations in a two-dimensional network of compensated electron and hole orbits

et al. 2005

View full text Add to dashboard Cite

-Fermi surface: calculations and measurements; effective mass, g factor. PACS. 72.15.Gd -Galvanomagnetic and other magnetotransport effects. PACS. 71.20.Rv -Polymers and organic compounds.Abstract. -The Fermi surface of the quasi-two dimensional (2D) organic metal (ET)8Hg4Cl12 (C6H5Br)2 can be regarded as a 2D network of compensated electron and hole orbits coupled by magnetic breakthrough. Simultaneous measurements of the interlayer magnetoresistance and magnetic torque have been performed for various directions of the magnetic field up to 28 T in the temperature range from 0.36 K to 4.2 K. Magnetoresistance and de Haas-van Alphen (dHvA) oscillations spectra exhibit frequency combinations typical of such a network. Even though some of the observed magnetoresistance oscillations cannot be interpreted on the basis of neither conventional Shubnikov-de Haas oscillations nor quantum interference, the temperature and magnetic field (both orientation and magnitude) dependence of all the Fourier components of the dHvA spectra can be consistently accounted for by the dHvA effect on the basis of the Lisfhitz-Kosevich formula. This behaviour is at variance with that currently reported for compounds illustrating the linear chain of coupled orbits model.Frequency combinations observed in magnetic oscillations spectra of multiband quasi twodimensional (2D) metals have been extensively studied both from theoretical and experimental viewpoints [1]. Nevertheless, the physical origin of some of the observed Fourier components, the so called 'forbidden frequencies', remain still unclear. In addition to quantum interference (QI) that can be invoked in the case of magnetoresistance (MR) data, these frequencies can be attributed to both the oscillation of the chemical potential [2,3] and the field-dependent magnetic breakthrough (MB)-induced Landau level broadening [4]. However, a quantitative model that involve these two latter contributions is still needed. The Fermi surface (FS) of most of the compounds exhibiting such frequencies corresponds to the linear chain of coupled orbits model. This model was introduced by Pippard in the early sixties in order to compute

show abstract

Competing types of quantum oscillations in the two-dimensional organic conductor(BEDT−TTF)

Cited by 29 publications

References 18 publications

Shubnikov-de Haas oscillations spectrum of the strongly correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)2] under pressure

Shubnikov-de Haas oscillations spectrum of the strongly correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)2] under pressure

Analytical treatment of the de Haas–van Alphen frequency combination due to chemical potential oscillations in an idealized two-band Fermi liquid

Magnetic oscillations in a two-dimensional network of compensated electron and hole orbits

Contact Info

Product

Resources

About