A high-magnetic-field-induced density-wave state in graphite

Yaguchi, Hiroshi; Singleton, John

doi:10.1088/0953-8984/21/34/344207

Cited by 37 publications

(50 citation statements)

References 28 publications

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“…Figure 2 shows the in-plane resistance of the graphite crystal for fields up to 60 T and temperatures below 10 K. The in-plane resistance first increases steeply, superimposed by Shubnikov-de Haas oscillations, and saturates above 15 T due to the presence of a closed Fermi surface [7,22,50,51]. At lowest temperatures a step is observed in the in-plane resistance at around 30 T, followed by a steep increase of the resistance, reaching its maximum value at 48 T before it drops down to below its initial value at around 53 T. This behavior has already been reported for Kish and highly oriented pyrolytic graphite, and has been attributed to the formation of a DW state [12,22,27,33,52]. Similar features can also be identified in the out-of-plane transport [12,35].…”

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confidence: 69%

“…Improved LL calculations by Takada and Goto [25] showed that electron correlations play a crucial role in renormalizing the Slonczewski-Weiss-McClure LL structure. Subsequent experiments to higher fields [26,27] identified a transition at 52 T corresponding to the collapse of a density wave phase as the (0; ↑) or (−1; ↓) LL emptied. So far attempts to directly measure the gap of this putative density wave spectroscopically [28,29] Recently, Fauqué et al [12] discovered the onset of a second density-wave anomaly above 53 T, by out-of-plane transport measurements on Kish graphite up to 80 T. This state was found to collapse at 75 T into a state with metallic c-axis conductivity.…”

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confidence: 99%

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Charge Density Waves in Graphite: Towards the Magnetic Ultraquantum Limit

et al. 2017

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Graphite is a model system for the study of three-dimensional electrons and holes in the magnetic quantum limit, in which the charges are confined to the lowest Landau levels. We report magneto-transport measurements in pulsed magnetic fields up to 60 T, which resolve the collapse of two charge density wave states in two, electron and hole, Landau levels at 52.3 and 54.2 T, respectively. We report evidence for a commensurate charge density wave at 47.1 T in the electron Landau level, and discuss the likely nature of the density wave instabilities over the full field range. The theoretical modeling of our results predicts that the ultraquantum limit is entered above 73.5 T. This state is an insulator, and we discuss its correspondence to the "metallic" state reported earlier. We propose that this (interaction-induced) insulating phase supports surface states that carry no charge or spin within the planes, but does, however, support charge transport out of plane.

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confidence: 69%

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confidence: 99%

Charge Density Waves in Graphite: Towards the Magnetic Ultraquantum Limit

et al. 2017

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“…This paper is devoted to Emanuil Aizikovich Kaner with whom we wrote two works on the oscillations in 2D coherent MB structures [26,27]. We have predicted in [27] a cascade of the magnetic-breakdown structural Pierls-like phase transitions which is similar to recent observations in graphite [7,49].…”

Section: F S εsupporting

confidence: 66%

“…The critical temperature increases proportionally to the MB probability ( ) W B together with the bandwidth 0 exp ( / ). [7,49].…”

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confidence: 99%

The Landau band effects in the quantum magnetic oscillations and the deviations from the quasiclassical Lifshitz–Kosevich theory in quasi-two-dimensional conductors

Gvozdikov

2011

Low Temperature Physics

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The quantum magnetic oscillations (QMO) in the layered and quasi-two-dimensional (2D) conductors deviate from the quasiclassical Lifshitz-Kosevich (LK) theory developed for 3D conventional metals. We discuss deviations related to the broadening of the Landau levels into Landau bands by various mechanisms (layer-stacking, magnetic breakdown, incoherence, disorder, localization etc.). Each mechanism yields a specific factor modulating the QMO amplitudes depending on the density of states and electron velocities within the Landau bands. In contrast to the LK theory, these factors differ for the thermodynamic (de Haas-van Alphen (dHvA)) and kinetic (Shubnikov-de Haas (SdH)) oscillations. We calculated the magnetic breakdown damping factors for the SdH and dHvA oscillations in the 2D conductors and analyzed their difference as well as the analogy between the bandwidth and Weiss oscillations. In case of an isotropic 3D metals the kinetic factors become proportional to the thermodynamic ones as is assumed in the LK theory.PACS: 71.18.+y Fermi surface: calculations and measurements; effective mass, g factor; 72.15.Gd Galvanomagnetic and other magnetotransport effects; 73.50.Jt Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects).

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“…This destruction was attributed to the depopulation of a Landau sub-level within the framework of YF scenario. The possible multiplicity of induced phases and their signatures in the in-plane and out of-plane charge transport remain open questions (for a review see [18]). Therefore, despite a large body of research on graphite at high magnetic field, the nature of its electronic ground state is not settled.…”

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Two Phase Transitions Induced by a Magnetic Field in Graphite

et al. 2013

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Different instabilities have been speculated for a three-dimensional electron gas confined to its lowest Landau level. The phase transition induced in graphite by a strong magnetic field, and believed to be a Charge Density Wave (CDW), is the only experimentally established case of such instabilities. Studying the magnetoresistance in graphite for the first time up to 80 T, we find that the magnetic field induces two successive phase transitions, consisting of two distinct ordered states each restricted to a finite field window. In both states, an energy gap opens up in the out-ofplane conductivity and coexists with an unexpected in-plane metallicity for a fully gap bulk system. Such peculiar metallicity may arise as a consequence of edge-state transport expected to develop in presence of a bulk gap.Graphite is a compensated semi-metal with a tiny three-dimensional Fermi surface and is described by the Slonczewski-Weiss-McClure (SWM) band model [1,2]. A modest magnetic field of 7.5 T perpendicular to the graphene layers confines electrons and holes to their lowest Landau levels (LLs). It is therefore an ideal candidate to explore the nature of the electronic ground state of a three-dimensional electron gas pushed beyond the socalled quantum limit. In this regime [3], the electronic spectrum becomes analogue to a one-dimensional system with a variety of possible instabilities [4][5][6]. In the early eighties, a phase transition in this system was discovered by Tanuma and co-workers who reported a sharp increase in the in-plane magnetoresistance of graphite at B≈25 T [8]. Numerous experimental studies followed [9][10][11][12][13][14][15] and confirmed the existence of a field-induced many-body state beyond a temperature-dependent critical magnetic field. Soon after the initial experimental discovery, Yoshioka and Fukuyama (YF) [16] ascribed this instability to a charge-density-wave (CDW). Such an instability is favored by one-dimensionality, because of the availability of a suitable (2k F ) nesting vector. In the original YF scenario, the CDW in adjacent valleys are out of phase, creating a valley density wave state [17], in order to minimize Coloumb energy. In 1998, by further increasing the magnetic field, Yaguchi and Singleton found that the field-induced state is eventually destroyed beyond 53 T [13]. This destruction was attributed to the depopulation of a Landau sub-level within the framework of YF scenario. The possible multiplicity of induced phases and their signatures in the in-plane and out of-plane charge transport remain open questions (for a review see [18]). Therefore, despite a large body of research on graphite at high magnetic field, the nature of its electronic ground state is not settled. In addition, these investigations can * benoit.fauque@espci.fr provide interesting input to the debate on the importance of many-body physics and its evolution with dimensionality in graphene [7].In this letter, we extend the previous measurements up to a magnetic field as strong as 80 T and focus on the contr...

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A high-magnetic-field-induced density-wave state in graphite

Cited by 37 publications

References 28 publications

Charge Density Waves in Graphite: Towards the Magnetic Ultraquantum Limit

Charge Density Waves in Graphite: Towards the Magnetic Ultraquantum Limit

The Landau band effects in the quantum magnetic oscillations and the deviations from the quasiclassical Lifshitz–Kosevich theory in quasi-two-dimensional conductors

Two Phase Transitions Induced by a Magnetic Field in Graphite

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