Competition of Charge-Density Waves and Superconductivity in Sulfur

Degtyareva, Olga; Magnitskaya, M. V.; Kohanoff, Jorge; Profeta, G.; Scandolo, Sandro; Hanfland, Michael; McMahon, M. I.; Gregoryanz, Eugene

doi:10.1103/physrevlett.99.155505

Cited by 54 publications

(34 citation statements)

References 21 publications

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“…Such consequences of the CDW formation in superconductors are not at all an exceptionally rare phenomenon. On the contrary, the hostile coexistence between CDWs and superconductivity has been observed in many materials [3,[16][17][18][19][20]. Unidirectional CDW-like modulations and checkerboard structures have been also found in a number of high-T c oxides [21][22][23], which provides a direct support for our viewpoint.…”

Section: Introductionsupporting

confidence: 56%

Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves

et al. 2008

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Differential conductance G as a function of the bias voltage V was measured for break-junctions of superconducting Bi2Sr2CaCu2O 8+δ and YBa 2 Cu 3 O 7−δ . The dependences G(V ) for both materials clearly demonstrate the so-called dip-hump structures outside the gap region. A theory, which suggests the charge-density-wave origin of the dip-hump structures and explains its specific form by intrinsic inhomogeneity of cuprate materials, was developed. The well-known pseudogap features in the tunnel spectra of high-Tc oxides found both below and above the superconducting critical temperature are also described by the theory, which testifies that both the pseudogap and the dip-hump structures have the same origin. Competing theories and various G(V ) peculiarities found for a number of superconducting oxides are briefly discussed.

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Section: Introductionsupporting

confidence: 56%

Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves

et al. 2008

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“…It is worth mentioning that despite considerable progress has been recently made in determining the crystal structures of the complex high-pressure structures [54], little is known about their physical properties [55]. In fact, an unexplored area for searching a charge-density wave state competing with the superconducting state in many complex incommensurate crystal structures of group V, VI, and VII heavy elements has been recently devised [56]. Furthermore, the observation of crystal-chemical differentiation of physically identical atoms in several complex high-pressure modifications of some metallic elements has encouraged renewed interest in the properties of compressed binary alloys [49].…”

Section: Elements Under Pressurementioning

confidence: 99%

Pressure‐induced structural phase transitions in materials and earth sciences

Manjón

Errandonea

2008

Physica Status Solidi (b)

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Pressure is an important thermodynamic parameter since it allows an increase of matter density by reducing volume. The reduction of volume by applying high pressures leads to an overall decrease of interatomic and intermolecular distances that allows exploring in detail atomic and molecular interactions. Therefore, high‐pressure research has improved our fundamental understanding of these interactions in solids, liquids and gasses. The study of the structure of matter under compression is a rapid developing field that is receiving increasing attention especially due to continuous experimental and theoretical developments. In this article, we give a brief description of the experimental and theoretical methods employed in the study of solid matter at high pressures and summarize the high‐pressure phases of the most relevant elements and inorganic compounds of the AX, A2X, AX2, ABX2, A2X3, ABX3, ABX4 and AB2X4 families giving an overview of the state of the art in high‐pressure research by highlighting recent discoveries, hot spots, controversial questions, and future directions of research. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Further increase of pressure above 135 GPa results into formation of phase S-V with rhombohedral β-Po structure [24][25][26]35 . The high-pressure phases of sulfur exhibit different electrical properties.…”

Section: Introductionmentioning

confidence: 99%

“…At pressures over 83 GPa, S-III transforms into aperiodic incommensurately (IC) modulated monoclinic phase S-IV 25,27,34 . Further increase of pressure above 135 GPa results into formation of phase S-V with rhombohedral β-Po structure [24][25][26]35 .…”

Section: Introductionmentioning

confidence: 99%

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Study of pressure-induced amorphization in sulfur usingab initiomolecular dynamics

Plašienka

Martoňák

2012

Phys. Rev. B

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We report results of ab initio constant-pressure molecular dynamics simulations of sulfur compression leading to structural transition and pressure-induced amorphization. Starting from the orthorhombic S-I phase composed of S8 ring molecules we find at room temperature and pressure of 20 GPa a transformation to monoclinic phase where half of the molecules develop a different conformation. Upon further compression, the monoclinic phase undergoes pressure-induced amorphization into an amorphous phase, in agreement with experiments. We study the dynamics of the amorphization transition and investigate the evolution of intra and intermolecular distances in the monoclinic phase in order to provide a microscopic insight into the rings disintegration process leading to amorphization. In the amorphous form we examine the structural properties and discuss its relation to the experimentally found amorphous form and to underlying crystal phases as well. The amorphous form we find appears to correspond to the experimentally observed low density amorphous form.

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Competition of Charge-Density Waves and Superconductivity in Sulfur

Cited by 54 publications

References 21 publications

Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves

Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves

Pressure‐induced structural phase transitions in materials and earth sciences

Study of pressure-induced amorphization in sulfur usingab initiomolecular dynamics

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