39 research outputs found

    Systematic Cu-63 NQR studies of the stripe phase in La(1.6-x)Nd(0.4)Sr(x)CuO(4) for 0.07 <= x <= 0.25

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    We demonstrate that the integrated intensity of Cu-63 nuclear quadrupole resonance (NQR) in La(1.6-x)Nd(0.4)Sr(x)CuO(4) decreases dramatically below the charge-stripe ordering temperature T(charge). Comparison with neutron and X-ray scattering indicates that the wipeout fraction F(T) (i.e. the missing fraction of the integrated intensity of the NQR signal) represents the charge-stripe order parameter. The systematic study reveals bulk charge-stripe order throughout the superconducting region 0.07 <= x <= 0.25. As a function of the reduced temperature t = T/T(charge), the temperature dependence of F(t) is sharpest for the hole concentration x=1/8, indicating that x=1/8 is the optimum concentration for stripe formation.Comment: 10 pages of text and captions, 11 figures in postscript. Final version, with new data in Fig.

    Comfort radicalism and NEETs: a conservative praxis

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    Young people who are not in education, employment or training (NEET) are construed by policy makers as a pressing problem about which something should be done. Such young people's lack of employment is thought to pose difficulties for wider society in relation to social cohesion and inclusion and it is feared that they will become a 'lost generation'. This paper(1) draws upon English research, seeking to historicise the debate whilst acknowledging that these issues have a much wider purchase. The notion of NEETs rests alongside longstanding concerns of the English state and middle classes, addressing unruly male working class youth as well as the moral turpitude of working class girls. Waged labour and domesticity are seen as a means to integrate such groups into society thereby generating social cohesion. The paper places the debate within it socio-economic context and draws on theorisations of cognitive capitalism, Italian workerism, as well as emerging theories of antiwork to analyse these. It concludes by arguing that ‘radical’ approaches to NEETs that point towards inequities embedded in the social structure and call for social democratic solutions veer towards a form of comfort radicalism. Such approaches leave in place the dominance of capitalist relations as well as productivist orientations that celebrate waged labour

    Structural matters in HTSC; the origin and form of stripe organization and checker boarding

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    The paper deals with the controversial charge and spin self-organization phenomena in the HTSC cuprates, of which neutron, X-ray, STM and ARPES experiments give complementary, sometimes apparently contradictory glimpses. The examination has been set in the context of the boson-fermion, negative-U understanding of HTSC advocated over many years by the author. Stripe models are developed which are 2q in nature and diagonal in form. For such a geometry to be compatible with the data rests upon both the spin and charge arrays being face-centred. Various special doping concentrations are closely looked at, in particular p = 0.1836 or 9/49, which is associated with the maximization of the superconducting condensation energy and the termination of the pseudogap regime. The stripe models are dictated by real space organization of the holes, whereas the dispersionless checkerboarding is interpreted in terms of correlation driven collapse of normal Fermi surface behaviour and response functions. The incommensurate spin diffraction below the resonance energy is seen as in no way expressing spin-wave physics or Fermi surface nesting, but is driven by charge and strain (Jahn-Teller) considerations, and it stands virtually without dispersion. The apparent dispersion comes from the downward dispersion of the resonance peak, and the growth of a further incoherent commensurate peak ensuing from the falling level of charge stripe organization under excitation.Comment: 49 pages with 8 figure

    The Paradox of Parkour: Conformity, Resistance and Spatial Exclusion

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    Drawing upon two years of ethnographic research into the spatially transgressive practice of parkour and freerunning, this chapter attempts to explain and untangle some of the contradictions that surround this popular lifestyle sport and its exclusion from our hyper-regulated cities. While the existing criminological wisdom suggests that these practices are a form of politicised resistance, this chapter positions parkour and freerunning as hyper-conformist to the underlying values of consumer capitalism and explains how late capitalism has created a contradiction for itself in which it must stoke desire for these lifestyle practices whilst also excluding their free practice from central urban spaces. Drawing on the emergent deviant leisure perspective’s interest in issues of infantilisation and adultification, this chapter explores the lifeworlds of young people who are attempting to navigate the challenges and anxieties of early adulthood. For the young people in this study, consumer capitalism’s commodification of rebellious iconography offered unique identities of ‘cool individualism’ and opportunities for flexibilised employment, while the post-industrial ‘creative city’ attempted to harness parkour’s practice, prohibitively if necessary, into approved spatial contexts under the buzzwords of ‘culture’ and ‘creativity’. Therefore, this chapter engages in a critical criminological reappraisal of issues of transgression, deviance and resistance in urban space under consumer capitalism

    The dark side of organizational paradoxes: The dynamics of disempowerment

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    Beyond NEET: precariousness, ideology and social justice - the 99%

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    This article addresses NEET (not in employment, education or training) as an ideological and discursive formation, lodging the discussion within its socio-economic context – one of increasing insecurity and precariousness. It argues that frequently quasi-political and ideological constructions of NEET can readily fold over into and articulate with discourses of the underclass and the broken society, as well as, paradoxically, social recession. Consequently, such arguments divert attention from processes of ‘othering’ and the secular changes facing society, as well as the spectre of a return to a form of nineteenth-century liberalism. Although the argument is located within the English context, it has a relevance to other Western societies in which similar tendencies can be discerned
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