Correlated topological phases (CTPs) with interplay between topology and electronic correlations have attracted tremendous interest in condensed matter physics. Therein, correlated Weyl semimetals (WSMs) are rare in nature and, thus, have so far been less investigated experimentally. In particular, the experimental realization of the interacting WSM state with logarithmic Fermi velocity renormalization has not been achieved yet. Here, experimental evidence of a correlated magnetic WSM state with logarithmic renormalization in strained pyrochlore iridate Pr2Ir2O7 (PIO) which is a paramagnetic Luttinger semimetal in bulk, is reported. Benefitting from epitaxial strain, “bulk‐absent” all‐in–all‐out antiferromagnetic ordering can be stabilized in PIO film, which breaks time‐reversal symmetry and leads to a magnetic WSM state. With further analysis of the experimental data and renormalization group calculations, an interacting Weyl liquid state with logarithmically renormalized Fermi velocity, similar to that in graphene, is found, dressed by long‐range Coulomb interactions. This work highlights the interplay of strain, magnetism, and topology with electronic correlations, and paves the way for strain‐engineering of CTPs in pyrochlore iridates.
Nanoscale patterning with massively parallel 2D array tips is of significant interest in scanning probe lithography. A challenging task for tip-based large area nanolithography is maintaining parallel tip arrays at the same contact point with a sample substrate in order to pattern a uniform array. Here, polymer pen lithography is demonstrated with a novel leveling method to account for the magnitude and direction of the total applied force of tip arrays by a multipoint force sensing structure integrated into the tip holder. This high-precision approach results in a 0.001° slope of feature edge length variation over 1 cm wide tip arrays. The position sensitive leveling operates in a fully automated manner and is applicable to recently developed scanning probe lithography techniques of various kinds which can enable "desktop nanofabrication."
Across four experiments, we show that materialists' willingness to engage in cause‐related marketing (CRM) depends on the type of campaign: product‐linked (brand linked to a cause through limited‐edition products) or donation‐linked (direct donations to a charitable cause). Materialists are more willing to engage in product‐linked than donation‐linked campaigns, whereas nonmaterialists show the opposite pattern. The effect for materialists is driven by the status‐signaling qualities that luxury products convey and is eliminated for value brands and when materialists' need for status is momentarily satiated. This study shows that materialists can be nudged to behave prosocially by leveraging their status‐seeking motivations in the context of luxury consumption, and luxury brands will maximize participation by utilizing product‐linked CRM campaigns.
Although luxury firms have come under increasing pressure to engage in corporate social responsibility (CSR) initiatives, they have traditionally been hesitant to engage because of the CSR–luxury paradox: the values and motivations underlying luxury consumption (self-enhancement) may conflict with the values and motivations underlying prosocial behavior (self-transcendence), and thus their CSR initiatives may not only be ineffective, they may actually harm the brand. In this commentary, we discuss research on the strategies and tactics luxury brands can use to nudge luxury consumers to engage in their cause-related marketing (CRM) initiatives by aligning the values of their luxury customers with the symbolic values of their CRM offerings and thus increase the impact of the prosocial causes on societal well-being. This research supports the objectives of transformative luxury research (TLR) in integrating luxury consumption into the mission and vision of transformative consumer research (TCR).
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