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Low-dimensional quantum magnets are a versatile materials platform for studying the emergent many-body physics and collective excitations that can arise even in systems with only short-range interactions. Understanding their low-temperature…

Neutron scattering experiments reveal that a diagonal spin modulation, which is a one-dimensional modulation rotated away by 45$^\circ$ from that in the superconducting phase, occurs universally across the insulating spin-glass phase in…

超导电性 · 物理学 2009-10-31 M. Matsuda , M. Fujita , K. Yamada , R. J. Birgeneau , M. A. Kastner , H. Hiraka , Y. Endoh , S. Wakimoto , G. Shirane

Magnetization measurements of LaCoO$_{3}$ have been carried out up to 133 T generated with a destructive pulse magnet at a wide temperature range from 2 to 120 K. A novel magnetic transition was found at $B>100$ T and $T>T^{*}=32\pm 5$ K…

强关联电子 · 物理学 2016-06-15 Akihiko Ikeda , Toshihiro Nomura , Yasuhiro H. Matsuda , Akira Matsuo , Koichi Kindo , Keisuke Sato

We present the results of muon-spin relaxation ($\mu$SR) measurements of the static and dynamic magnetism of $M_{1/3}$NbS$_2$ ($M$ = Fe, V, Mn), three intercalated transition-metal dichalcogenides. Transitions to long-range magnetic order…

The Shastry-Sutherland model, which provides a representation of the magnetic properties of SrCu$_2$(BO$_3$)$_2$, has been studied by series expansion methods at T=0. Our results support the existence of an intermediate phase between the…

强关联电子 · 物理学 2007-05-23 Zheng Weihong , J. Oitmaa , C. J. Hamer

Equilibrium magnetization states in thin spherical shells of a magnetically soft ferromagnet are determined by the competition between two interactions: (i) The local exchange interaction favours the more homogeneous onion state with…

介观与纳米尺度物理 · 物理学 2018-01-23 Mykola I. Sloika , Denis D. Sheka , Volodymyr P. Kravchuk , Oleksandr V. Pylypovskyi , Yuri Gaididei

The application of a magnetic field transverse to the easy axis, Ising direction in the quasi-two-dimensional Kagome staircase magnet, Co3V2O8, induces three quantum phase transitions at low temperatures, ultimately producing a novel high…

强关联电子 · 物理学 2015-11-10 K. Fritsch , G. Ehlers , K. C. Rule , K. Habicht , M. Ramazanoglu , H. A. Dabkowska , B. D. Gaulin

Strong evidence for charge-density correlation in the underdoped phase of the cuprate YBa2Cu3Oy was obtained by nuclear magnetic resonance (NMR) and resonant x-ray scatter- ing. The fluctuations were found to be enhanced in strong magnetic…

The generic changes of the electronic compressibility in systems which show magnetic instabilities is studied. It is shown that, when going into the ordered phase, the compressibility is reduced by an amount comparable to the its original…

凝聚态物理 · 物理学 2009-10-31 F. Guinea , G. Gomez-Santos , D. Arovas

Spinon-magnon mixing was recently reported in botallackite Cu$_2$(OH)$_3$Br with a uniaxially compressed triangular lattice of Cu$^{2+}$ quantum spins [Zhang et al., Phys. Rev. Lett. 125, 037204 (2020)]. Its nitrate counterpart rouaite,…

We have studied the magnetic relaxation properties of the phase-separated manganite compound La0.250Pr0.375Ca0.375MnO3 . A series of polycrystalline samples was prepared with different sintering temperatures, resulting in a continuous…

强关联电子 · 物理学 2016-08-16 I. G. Deac , S. V. Diaz , B. G. Kim , S. -W. Cheong , P. Schiffer

In dense neutron matter under the presence of a strong magnetic field, considered in the model with the Skyrme effective interaction, there are possible two types of spin ordered states. In one of them the majority of neutron spins are…

核理论 · 物理学 2011-06-10 A. A. Isayev , J. Yang

A single-site dynamical mean field study of a three band model with the rotationally invariant interactions appropriate to the t_2g levels of a transition metal oxide reveals a quantum phase transition between a paramagnetic metallic phase…

强关联电子 · 物理学 2008-10-27 Philipp Werner , Emanuel Gull , Matthias Troyer , Andrew J. Millis

The magnetic and multiferroic phase diagram of Mn$_{0.85}$Co$_{0.15}$WO$_4$ single crystals is investigated by means of magnetic, heat capacity, dielectric, polarization, and neutron scattering experiments. Three magnetic phase transitions…

强关联电子 · 物理学 2010-12-01 R. P. Chaudhury , F. Ye , J. A. Fernandez-Baca , Y. -Q. Wang , Y. Y. Sun , B. Lorenz , H. A. Mook , C. W. Chu

Magnetic excitations in the isostructural spin-dimer systems Sr3Cr2O8 and Ba3Cr2O8 are probed by means of high-field electron spin resonance at sub-terahertz frequencies. Three types of magnetic modes were observed. One mode is gapless and…

Evidence is presented for a first-order magnetic phase transition in a gated two-dimensional semiconductor, monolayer-MoS$_2$. The phase boundary separates a spin-polarised (ferromagnetic) phase at low electron density and a paramagnetic…

We classify the magnetic ground states of a 2D lattice of localized magnetic moments which are coupled to a superconducting substrate with Rashba-spin-orbit coupling. We discover a rich magnetic phase diagram with surprisingly complex…

We report high-resolution x-ray diffraction, muon-spin-rotation spectroscopic and specific heat measurements in the double spin-chains compound $\rm LiCu_2O_2$. The x-ray diffraction results show that the crystal structure of $\rm…

强关联电子 · 物理学 2009-10-31 B. Roessli , U. Staub , A. Amato , D. Herlach , P. Pattison , K. Sablina , G. A. Petrakovskii

In this paper, we examine the possible influence of extrinsic factors on the electrical and magnetotransport of La(0.67)Ca(0.33)Mn(1-x)Ru(x)O(3) (x < 0.10). These results not only exclude the extrinsic factors, but establishes the fact that…

材料科学 · 物理学 2009-11-11 L. Seetha Lakshmi , V. Sridharan , R. Rawat , A. A. Sukumar , M. Kamuddin , V. S. Sastry , V. S. Raju

In our study, we conduct magnetization and heat capacity measurements to investigate field induced magnetic phase transitions within the newly synthesized compound K2Ni2(SeO3)3, a spin-1 dimer system arranged on a triangular lattice. From…

强关联电子 · 物理学 2024-05-30 Lei Yue , Ziyou Lu , Kun Yan , Le Wang , Shu Guo , Ruixin Guo , Peng Chen , Xiaobin Chen , Jia-Wei Mei