18 Result(s)
within
T Sasagawa
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessUnconventional short-range structural fluctuations in cuprate superconductors
The interplay between structural and electronic degrees of freedom in complex materials is the subject of extensive debate in physics and materials science. Particularly interesting questions pertain to the na...
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Open AccessMagnetic field reveals vanishing Hall response in the normal state of stripe-ordered cuprates
The origin of the weak insulating behavior of the resistivity, i.e. \({\rho }_{xx}\propto {\mathrm{ln}}\,(1/T)\) ...
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Publisher Correction: A weak topological insulator state in quasi-one-dimensional bismuth iodide
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Open AccessPair density wave at high magnetic fields in cuprates with charge and spin orders
In underdoped cuprates, the interplay of the pseudogap, superconductivity, and charge and spin ordering can give rise to exotic quantum states, including the pair density wave (PDW), in which the superconducti...
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A weak topological insulator state in quasi-one-dimensional bismuth iodide
The major breakthroughs in understanding of topological materials over the past decade were all triggered by the discovery of the Z2-type topological insulator—a type of material that is insulating in its interio...
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Open AccessAuthor Correction: Full-gap superconductivity in spin-polarised surface states of topological semimetal β-PdBi2
The original version of this article contained an error in Fig. 3. The calculated patterns of quasiparticle interference in the figure were incorrect due to the wrong Wannier transformation in the calculation....
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Open AccessFull-gap superconductivity in spin-polarised surface states of topological semimetal β-PdBi2
A bulk superconductor possessing a topological surface state at the Fermi level is a promising system to realise long-sought topological superconductivity. Although several candidate materials have been propos...
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Open AccessObservation of Zeeman effect in topological surface state with distinct material dependence
Manipulating the spins of the topological surface states represents an essential step towards exploring the exotic quantum states emerging from the time reversal symmetry breaking via magnetic do** or extern...
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Open AccessFerroelectricity in underdoped La-based cuprates
Do** a “parent” antiferromagnetic Mott insulator in cuprates leads to short-range electronic correlations and eventually to high-Tc superconductivity. However, the nature of charge correlations in the lightly d...
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Open AccessUltrafast electronic state conversion at room temperature utilizing hidden state in cuprate ladder system
Photo-control of material properties on femto- (10−15) and pico- (10−12) second timescales at room temperature has been a long-sought goal of materials science. Here we demonstrate a unique ultrafast conversion b...
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Open AccessTopologically protected surface states in a centrosymmetric superconductor β-PdBi2
The topological aspects of electrons in solids can emerge in real materials, as represented by topological insulators. In theory, they show a variety of new magneto-electric phenomena, and especially the ones ...
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Open AccessPoint nodes persisting far beyond Tc in Bi2212
In contrast to a complex feature of antinodal state, suffering from competing orders, the pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism...
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Open AccessUltrafast charge localization in a stripe-phase nickelate
Self-organized electronically ordered phases are a recurring feature in correlated materials, resulting in, for example, fluctuating charge stripes whose role in high-TC superconductivity is under debate. However...
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Phase fluctuations and the absence of topological defects in a photo-excited charge-ordered nickelate
The dynamics of an order parameter's amplitude and phase determines the collective behaviour of novel states emerging in complex materials. Time- and momentum-resolved pump-probe spectroscopy, by virtue of mea...
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Abrupt onset of a second energy gap at the superconducting transition of underdoped Bi2212
In underdoped high-TC superconducting copper oxides a pseudogap develops well above TC. Whether the pseudogap is a distinct phenomenon or the incoherent continuation of the superconducting gap above TC is one of ...
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An unusual isotope effect in a high-transition-temperature superconductor
In conventional superconductors, the electron pairing that allows superconductivity is caused by exchange of virtual phonons, which are quanta of lattice vibration. For high-transition-temperature (high-Tc) super...
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Universal nodal Fermi velocity
The mechanism that causes high-temperature superconductivity in copper oxide materials (cuprates) is still unknown, more than 15 years after it was discovered1. As the charge carriers (electrons or holes) are int...
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Antiferromagnetic order induced by an applied magnetic field in a high-temperature superconductor
One view of the high-transition-temperature (high-Tc) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasiparticles (corresponding t...
