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Journal Articles

Fermi surface in the hidden-order state of URu$$_2$$Si$$_2$$ under intense pulsed magnetic fields up to 81T

Scheerer, G. W.*; Knafo, W.*; Aoki, Dai*; Nardone, M.*; Zitouni, A.*; B$'e$ard, J.*; Billette, J.*; Barata, J.*; Jaudet, C.*; Suleiman, M.*; et al.

Physical Review B, 89(16), p.165107_1 - 165107_12, 2014/04

 Times Cited Count:10 Percentile:42.05(Materials Science, Multidisciplinary)

Journal Articles

Magnetic polarization and Fermi surface instability; Case of YbRh$$_2$$Si$$_2$$

Pourret, A.*; Knebel, G.*; Matsuda, Tatsuma; Lapertot, G.*; Flouquet, J.*

Journal of the Physical Society of Japan, 82(5), p.053704_1 - 053704_5, 2013/05

 Times Cited Count:29 Percentile:78.94(Physics, Multidisciplinary)

Oral presentation

NMR study of ferromagnetic superconductor URhGe under uniaxial stress

Tokunaga, Yo; Aoki, Dai*; Braithwaite, D.*; Knebel, G.*; Brison, J.-P.*; Pourret, A.*; Lapertot, G.*; Niu, Q.*; Valiska, M.*; Flouquet, J.*; et al.

no journal, , 

In this study, using a single crystal of URhGe, we performed zero-field NMR study under uniaxial stress. For all the observed NMR peaks, a successive shift toward lower frequencies has been ob- served with increasing the uniaxial stress. The behavior indicates uniform and successive change of local environments at the nuclear positions. Simultaneously, however, we have also seen a broadening of the NMR peaks with increasing the stress, in particular above 0.8 GPa, suggesting the distribution of the local environments with larger stresses.

Oral presentation

NMR study of ferromagnetic superconductor URhGe under uniaxial stress

Tokunaga, Yo; Aoki, Dai*; Braithwaite, D.*; Knebel, G.*; Brison, J.-P.*; Pourret, A.*; Lapertot, G.*; Niu, Q.*; Valiska, M.*; Flouquet, J.*; et al.

no journal, , 

Recently, uniaxial stress has been found to be a remarkable tool for tuning the pairing strength in a ferromagnetic superconductor URhGe. A relatively small uniaxial stress applied along the $$b$$ crystal axis changes the superconducting (SC) phase diagram significantly, merging the low-field SC and reentrant SC domes, with a large enhancement of $$T_{sc}$$. The $$T_{sc}$$ increases both at zero field and under a field, reaching 1 K, more than twice higher than at ambient pressure. This enhancement of SC has been shown to be directly related to a change of the magnetic dimensionality, moving the system away from the Ising-type limit, which results in the rapid decrease of the $$H_{rm R}$$. In this study, by means of zero-field $$^{73}$$Ge NMR in the ferromagnetic state, we have investigated the effects of uniaxial stress on the electronic state of URhGe.

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