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Metal-insulator (MI) transitions in correlated electron systems have long been a central and controversial issue in material science. Vanadium dioxide (VO2) exhibits a first-order MI transition at 340 K. For more than half a century, it has…

Strongly Correlated Electrons · Physics 2020-08-26 Yasuhiro H. Matsuda , Daisuke Nakamura , Akihiko Ikeda , Shojiro Takeyama , Yuji Muraoka , Yuki Suga

Different instabilities have been speculated for a three-dimensional electron gas confined to its lowest Landau level. The phase transition induced in graphite by a strong magnetic field, and believed to be a Charge Density Wave (CDW), is…

Strongly Correlated Electrons · Physics 2015-06-15 Benoît Fauqué , David LeBoeuf , Baptiste Vignolle , Marc Nardone , Cyril Proust , Kamran Behnia

Low temperature ultrasound velocity measurements are presented on the frustrated spin system SrDy2O4 that allow us to define high resolution phase diagrams with the magnetic field applied along all three principal axes. For H||b, a region…

Strongly Correlated Electrons · Physics 2016-03-16 C. Bidaud , O. Simard , G. Quirion , B. Prévost , S. Daneau , A. D. Bianchi , H. A. Dabkowska , J. A. Quilliam

We investigated the effect of magnetic field on the highly correlated metal near the Mott transition in the quasi-two-dimensional layered organic conductor, $\kappa$-(BEDT-TTF)$_{2}$Cu[N(CN)$_{2}$]Cl, by the resistance measurements under…

Strongly Correlated Electrons · Physics 2009-11-10 F. Kagawa , T. Itou , K. Miyagawa , K. Kanoda

We report a magnetic x-ray scattering study of the field-induced multiferroic GdFe3(BO3)4. Resonant x-ray magnetic scattering at the Gd LII,III edges indicates that the Gd moments order at TN ~ 37 K. The magnetic structure is incommensurate…

Strongly Correlated Electrons · Physics 2009-11-13 Haiding Mo , Christie S. Nelson , Leonard N. Bezmaternykh , V. T. Temerov

In the scientific description of unconventional transport properties of oxides (spin-dependent transport, superconductivity etc.), the spin-state degree of freedom plays a fundamental role. Because of this, temperature- or magnetic…

Materials Science · Physics 2014-11-12 M. Rotter , Z. -S. Wang , A. T. Boothroyd , D. Prabhakaran , A. Tanaka , M. Doerr

We observe a bilinear magnetic field-induced electric polarization of 50 $\mu C/m^2$ in single crystals of NiCl$_2$-4SC(NH$_2$)$_2$ (DTN). DTN forms a tetragonal structure that breaks inversion symmetry, with the highly polar thiourea…

Materials Science · Physics 2015-05-19 V. S. Zapf , F. Nasreen , F. Wolff-Fabris , A. Paduan-Filho

We report on local probe measurements of current-voltage and electrostatic force-voltage characteristics of electric-field-induced insulator to metal transition in VO2 thin film. In conducting AFM mode, switching from the insulating to…

Strongly Correlated Electrons · Physics 2012-01-09 B. Wu , A. Zimmers , H. Aubin , R. Ghosh , Y. Liu , R. Lopez

The spin-driven component of electric polarization in a single crystal of multiferroic BiFeO$_{3}$ was experimentally investigated in pulsed high magnetic fields up to 41 T. Sequential measurements of electric polarization for various…

Strongly Correlated Electrons · Physics 2020-01-08 Shiro Kawachi , Shin Miyahara , Toshimitsu Ito , Atsushi Miyake , Nobuo Furukawa , Jun-ichi Yamaura , Masashi Tokunaga

The crystal structure of Cs$_2$CuBr$_4$ is the same as that of Cs$_2$CuCl$_4$, which has been characterized as a spin-1/2 quasi-two-dimensional frustrated system. The magnetic properties of Cs$_2$CuBr$_4$ were investigated by magnetization…

Strongly Correlated Electrons · Physics 2009-11-07 H. Tanaka , T. Ono , H. A. Katori , H. Mitamura , F. Ishikawa , T. Goto

We incorporate single crystal Fe$_3$O$_4$ thin films into a gated device structure and demonstrate the ability to control the Verwey transition with static electric fields. The Verwey transition temperature ($T_V$) increases for both…

Strongly Correlated Electrons · Physics 2015-06-04 Jared J. I. Wong , Adrian G. Swartz , Renjing Zheng , Wei Han , Roland K. Kawakami

Spin systems with honeycomb structures have recently attracted a great deal of attention in connection with the Kitaev quantum spin liquid state (QSL) predicted theoretically. One possible Kitaev QSL candidate is Na$_2$Co$_2$TeO$_6$…

Strongly Correlated Electrons · Physics 2023-12-11 A. K. Bera , S. M. Yusuf , F. Orlandi , P. Manuel , L. Bhaskaran , S. A. Zvyagin

We investigate the magnetic field dependence of the spin-Peierls transition in NaV$_2$O$_5$ in the field range 16T-30T. The transition temperature exhibits a very weak variation with the field, suggesting a novel mechanism for the formation…

Strongly Correlated Electrons · Physics 2009-10-31 S. G. Bompadre , Arthur F. Hebard , Valeri N. Kotov , D. Hall , G. Maris , J. Baas , T. T. M. Palstra

Transistors realized on 2D antiferromagnetic semiconductor CrPS$_4$ exhibit large magnetoconductance, due to magnetic-field-induced changes in magnetic state. The microscopic mechanism coupling conductance and magnetic state is not…

Mesoscale and Nanoscale Physics · Physics 2023-09-11 Fan Wu , Marco Gibertini , Kenji Watanabe , Takashi Taniguchi , Ignacio Gutiérrez-Lezama , Nicolas Ubrig , Alberto F. Morpurgo

High-resolution thermal expansion and magnetostriction measurements were performed on single crystals of $\alpha$-RuCl$_3$ in magnetic fields applied parallel to the Ru-Ru bonds. The length changes were measured in the direction…

EuTiO_{3} undergoes a structural phase transition from cubic to tetragonal at T_S = 282 K which is not accompanied by any long range magnetic order. However, it is related to the oxygen ocathedra rotation driven by a zone boundary acoustic…

Materials Science · Physics 2013-01-28 Z. Guguchia , H. Keller , J. Kohler , A. Bussmann-Holder

We show that 1:1 ordering of A$'$ and A$''$ cations in A$'_{1/2}$A$''_{1/2}$B$_2$X$_4$ magnetic spinels results in appearance of magnetoelectric properties. Possible value of magnetically induced electric polarization is calculated using…

Strongly Correlated Electrons · Physics 2014-05-15 N. V. Ter-Oganessian

Magnetic, dielectric, and magnetoelectric properties in a spin-state transition system are examined, motivated by the recent discovery of a multiferroic behavior in a cobalt oxide. We construct an effective model Hamiltonian based on the…

Strongly Correlated Electrons · Physics 2018-06-13 Makoto Naka , Eriko Mizoguchi , Joji Nasu , Sumio Ishihara

Magnonic excitations are investigated in chromium oxychloride (CrOCl), a van der Waal (vdW) antiferromagnet prone to a multitude of magnetic phase transitions, with absorption experiments in a broad continuous energy range. At low magnetic…

In this paper, the lowest order constrained variational (LOCV) method has been used to investigate the magnetic properties of spin polarized neutron matter in the presence of strong magnetic field at zero temperature employing $AV_{18}$…

Nuclear Theory · Physics 2015-03-19 G. H. Bordbar , Z. Rezaei , Afshin Montakhab