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O-11 19 NMR study on strongly correlated electrons in Q2D organics Kazushi Kanoda 1 1 Department of Applied Physics, University of Tokyo, Japan Mott transition is a metal-insulator transition induced by electron-electron Coulomb interaction. When the lattice is triangular, antiferromagnetically interacting spins suffer from geometrical frustration against ordering. So, the correlated electrons on triangular lattice in the vicinity of Mott transition are in an intriguing situation where both the charge and spin degrees of freedom possibly exhibit quantum fluctuations. The family of layered organic conductors, kappa-(ET)2X, whose bandwidth is comparable with the Coulomb repulsive energy and controllable by pressure, are model systems of interacting electrons on anisotropic triangular lattice. In this conference, I review our NMR studies on kappa-(ET)2X, which revealed the criticality of Mott transition, the possible existence of spin liquid and the natures of superconductivity and vortices. This presentation is based on collaborations with K. Miyagawa, F. Kagawa, Y. Shimizu, Y. Kurosaki, T. Furukawa, H. Hashiba, H. Oike, H. Taniguchi, S. Yamashita and Y. Nakazawa. [1] F. Kagawa et al., Nature 436 (2005) 534; Nature Phys.5 (2009) 880. [2] Y. Shimizu et al., PRL 91 (2003) 107001; Kurosaki et al., PRL95 (2005) 177001; Shimizu et al., PRB 70 (2006) 060510; PRB 81 (2010) 224508. [3] K. Kanoda, chapter 22 in "The Physics of Organic Superconductors and Conductors," Edited by A. Lebed, Springer, 2008
O-12 20 Broadband NMR at ultra high magnetic fields up to 34 Tesla Steffen Krämer 1 , Mladen Horvatić 1 , Claude Berthier 1 , Francesco Aimo 1 , Martin Klanjšek 2 , Raivo Stern 3 1 LNCMI , UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France 2 Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia 3 NICPB, 12618 Tallinn , Estonia NMR is a powerful method for investigating many problems in <strong>phy</strong>sics and materials science. In particular, NMR is applied to study properties of condensed matter like quantum phase transitions in strongly correlated electron systems. When these phenomena occur at higher magnetic fields than 17 T, NMR is currently the only microscopic technique that provides access to local magnetic properties. Recently, we extended the NMR options at the Laboratoire National des Champs Magnétiques Intenses in Grenoble to ultra high magnetic fields up to 34 T, frequencies up to 1.5 GHz and temperatures as low as 50 mK. We present an overview of our technical efforts and current high field research projects. By 1 H and 63,65 Cu NMR at 15-34 T and down to 0.4 K we identified the spin structure of azurite, Cu 3 (CO 3 ) 2 (OH) 2 , a model system for the frustrated antiferromagnetic Heisenberg spin-1/2 chain of “distorted diamond” geometry [1]. By 29 Si NMR down to 50 mK we found an exotic and modulated Bose-Einstein Condensate of magnetic triplet excitations in the Han purple compound (BaCuSi 2 O 6 ) above 23.5 T that will be discussed within the framework of different theoretical concepts [2]. [1] F. Aimo et al., Phys. Rev. Lett. 102, 127205/1-4 (2009) and unpublished. [2] S. Krämer et al., Phys. Rev. B 76, 100406(R)/1-4 (2007) and unpublished.
Page 1 and 2: ABSTRACT BOOK RECENT ADVANCES IN BR
Page 3 and 4: RECENT ADVANCES IN BROAD BAND SOLID
Page 9 and 10: INVITED LECTURES
Page 11 and 12: O-2 10 NMR in Quantum Spin Systems
Page 13 and 14: O-4 12 NMR and the quasi-one dimens
Page 15 and 16: O-7 14 NMR studies on the new iron
Page 17 and 18: O-9 16 NMR methods for investigatio
Page 19: O-10 18 Sodium cobaltates: A golden
Page 23 and 24: O-14 22 Strong Cu-O hybridization i
Page 25 and 26: O-16 24 Kagome Frustrated Antiferro
Page 27 and 28: O-18 26 Multiband Superconductivity
Page 29 and 30: O-20 28 Magnetic and physical prope
Page 31 and 32: O-21 30 NMR spin echo study of RF-I
Page 33 and 34: O-23 32 Clarification of Quantum Cr
Page 35 and 36: O-25 34 Nanoscale electronic order
Page 37 and 38: O-27 36 75 As NMR in Fe pnictide su
Page 39 and 40: O-29 38 NQR study of the phase segr
Page 41 and 42: O-31 40 NMR study of the Tomonaga-L
Page 43 and 44: POSTER CONTRIBUTIONS
Page 45 and 46: P-2 44 Cryogenic static and magic-a
Page 47 and 48: P-4 46 Nuclear Magnetic Resonance E
Page 49 and 50: P-6 48 Charge Induced Vortex Lattic
Page 51 and 52: P-8 50 77 Se NMR study of λ-(BETS)
Page 53 and 54: P-9 52 Electron spin relaxation in
Page 55 and 56: P-10 54 saturation field B c = 14.9
Page 57 and 58: P-12 56 Superionic Conductivity and
Page 59 and 60: P-14 58 NMR study of Quantum Critic
Page 61 and 62: P-16 60 Gap structure and vortex dy
Page 63 and 64: P-18 62 New Facility for Broadband
Page 65 and 66: P-20 64 Complex interplay of Ce 4f
Page 67 and 68: P-21 66 in our experiment. However,
Page 69 and 70: P-23 68 Observation of the Fermi Li
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P-25 70 Magnetic-field induced phas
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RECENT ADVANCES IN BROAD BAND SOLID
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