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Publications (23)

cond-mat.str-el2023

Coherent control of orbital wavefunctions in the quantum spin liquid $T b_{2} T i_{2} O_{7}$

R. Mankowsky, M. MÃ¼ller, M. Sander +15

Resonant driving of electronic transitions with coherent laser sources creates quantum coherent superpositions of the involved electronic states. Most time-resolved studies have fo…

cond-mat.str-el2014

Spin-orbit fluctuations in frustrated heavy-fermion metal LiV $_{2}$ O $_{4}$

K. Tomiyasu, K. Iwasa, H. Ueda +6

Spin fluctuations were studied over a wide momentum ( $ℏ Q$ ) and energy ( $E$ ) space in the frustrated $d$ -electron heavy-fermion metal LiV $_{2}$ O $_{4}$ by time-of-flight inelastic n…

nucl-th2011

Possibility of QCD critical point sweep during black hole formation

A. Ohnishi, H. Ueda, T. Z. Nakano +2

We discuss the possibility to probe the QCD critical point during the dynamical black hole formation from a gravitational collapse of a massive star, where the temperature and the…

cond-mat.str-el2008

Weakly coupled $s = 1/2$ quantum spin singlets in Ba $_{3}$ Cr $_{2}$ O $_{8}$

M. Kofu, J. -H. Kim, S. Ji +6

Using single crystal inelastic neutron scattering with and without application of an external magnetic field and powder neutron diffraction, we have characterized magnetic interact…

cond-mat.str-el2020

Magnetic field dependent cycloidal rotation in pristine and Ge doped CoCr $_{2}$ O $_{4}$

N Ortiz Hernandez, S Parchenko, J R L Mardegan +11

We report a soft x-ray resonant magnetic scattering study of the spin configuration in multiferroic thin films of Co $_{0.975}$ Ge $_{0.025}$ Cr $_{2}$ O $_{4}$ (Ge-CCO) and CoCr $_{2}$ O $_{4}$ (CC…

cond-mat.str-el2012

Infrared phonons and specific heat in Ba3Cr2O8

Zhe Wang, M. Schmidt, A. GÃ¼nther +7

We report on the phonon spectrum of Ba3Cr2O8 determined by infrared spectroscopy, and on specific heat measurements across the Jahn-Teller transition in magnetic fields up to 9 T.…

cond-mat.mtrl-sci2019

Magnetoelectric coupling in a frustrated spinel studied using high-field scanning probe microscopy

L. Rossi, D. BrÃ¼ning, H. Ueda +3

Below its NÃ©el temperature, the frustrated magnet CdCr $_{2}$ O $_{4}$ exhibits an antiferromagnetic spin-spiral ground state. Such states can give rise to a sizable magnetoelectric coup…

cond-mat.str-el2006

Site-Selective NMR in the Quasi-1D Conductor beta-Sr0.33V2O5

T. Waki, M. Takigawa, T. Yamauchi +3

We report 51V NMR experiments in the metallic phase of the quasi-one-dimensional (1D) conductor beta-Sr0.33V2O5. The Knight shift and the quadrupole splitting of all six vanadium s…

quant-ph2023

Diamond-shaped quantum circuit for real-time quantum dynamics in one dimension

S. Miyakoshi, T. Sugimoto, T. Shirakawa +2

In recent years, quantum computing has evolved as an exciting frontier, with the development of numerous algorithms dedicated to constructing quantum circuits that adeptly represen…

cond-mat.str-el2011

Synchrotron x-ray study of lattice vibrations in CdCr2O4

J. -H. Kim, M. Matsuda, H. Ueda +5

Using inelastic x-ray scattering we have investigated lattice vibrations in a geometric frustrated system CdCr2O4 that upon cooling undergoes a spin-Peierls phase transition at TN…

cond-mat.str-el2011

Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr $_{2}$ O $_{4}$

K. Tomiyasu, H. Ueda, M. Matsuda +3

A hexamer-type spin excitation seen in spinel chromates $A$ Cr $_{2}$ O $_{4}$ ( $A$ = Mg, Zn, or Cd) is the representative spin-liquid-like state caused by geometrical frustration. To clar…

cond-mat.str-el2005

Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr $_{2}$ O $_{4}$

J. -H. Chung, M. Matsuda, S. -H. Lee +6

Using elastic and inelastic neutron scattering we show that a cubic spinel, CdCr $_{2}$ O $_{4}$ , undergoes an elongation along the c-axis ( $c > a = b$ ) at its spin-Peierls-like phase tra…

nucl-th2012

QCD critical point in the strong coupling lattice QCD and during black hole formation

A. Ohnishi, K. Miura, T. Z. Nakano +4

We discuss the QCD phase diagram from two different point of view. We first investigate the phase diagram structure in the strong coupling lattice QCD with Polyakov loop effects, a…

cond-mat.mtrl-sci2009

Universal magnetic structure of the half-magnetization phase in Cr-based spinels

M. Matsuda, K. Ohoyama, S. Yoshii +9

Using an elastic neutron scattering technique under a pulsed magnetic field up to 30 T, we determined the magnetic structure in the half-magnetization plateau phase in the spinel C…

cond-mat.str-el2004

Orbital and spin chains in ZnV2O4

S. -H. Lee, D. Louca, H. Ueda +8

Our powder inelastic neutron scattering data indicate that \zvo is a system of spin chains that are three dimensionally tangled in the cubic phase above 50 K due to randomly occupi…

cond-mat.dis-nn2020

Entanglement Entropy of the Two-Dimensional +-J Ising Model on the Nishimori Line

Y. Sasagawa, H. Ueda, J. Genzor +2

A classical analogue of the entanglement entropy is calculated on the system boundary of the two-dimensional Edwards-Anderson model, where the nearest-neighbor interaction is stoch…

cond-mat.str-el2019

Negative thermal expansion in the plateau state of a magnetically-frustrated spinel

L. Rossi, A. Bobel, S. Wiedmann +6

We report on negative thermal expansion (NTE) in the high-field, half-magnetization plateau phase of the frustrated magnetic insulator CdCr2O4. Using dilatometry, we precisely map…

cond-mat.str-el2009

Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba $_{3}$ Cr $_{2}$ O $_{8}$

M. Kofu, H. Ueda, H. Nojiri +8

By using bulk magnetization, electron spin resonance (ESR), heat capacity, and neutron scattering techniques, we characterize the thermodynamic and quantum phase diagrams of Ba $_{3}$ …

cond-mat.str-el2002

Charge dynamics and "ferromagnetism" of A1-xLaxB6 (A=Ca and Sr)

K. Taniguchi, T. Katsufuji, F. Sakai +3

Ferromagnetism has been reported recently in La-doped alkaline-earth hexaborides, A1-xLaxB6 (A=Ca, Sr, and Ba). We have performed the reflectivity, Hall resistivity, and magnetizat…

cond-mat.mtrl-sci2023

Efficient NMR measurement and data analysis supported by the Bayesian inference : The case of the heavy fermion compound YbCo2Zn20

H. Ueda, S. Katakami, S. Yoshida +4

We propose a data-driven technique to infer microscopic physical quantities from nuclear magnetic resonance(NMR) spectra, in which the data size and quality required for the Bayesi…

astro-ph2004

s-process branching at 185W revised

P. Mohr, T. Shizuma, H. Ueda +7

The neutron capture cross section of the unstable s-process branching nucleus 185W has been derived from experimental data of the inverse 186W(g,n)185W photodisintegration taken wi…

cond-mat.str-el2007

Spin-lattice instability to a fractional magnetization state in the spinel HgCr2O4

M. Matsuda, H. Ueda, A. Kikkawa +6

Magnetic systems are fertile ground for the emergence of exotic states when the magnetic interactions cannot be satisfied simultaneously due to the topology of the lattice - a situ…

cond-mat.str-el2011

Quasi-one-dimensional spin dynamics in LiV2O4: 1D-to-3D crossover as a possible origin of heavy fermion state

R. Kadono, A. Koda, W. Higemoto +6

Spin fluctuation in LiV2O4 is revisited by examining the earlier result of muon spin rotation/ relaxation measurements. Instead of a relationship for the localized electron limit,…

Publications (23)

Coherent control of orbital wavefunctions in the quantum spin liquid Tb2​Ti2​O7​

Spin-orbit fluctuations in frustrated heavy-fermion metal LiV2​O4​

Possibility of QCD critical point sweep during black hole formation

Weakly coupled s=1/2 quantum spin singlets in Ba3​Cr2​O8​

Magnetic field dependent cycloidal rotation in pristine and Ge doped CoCr2​O4​

Infrared phonons and specific heat in Ba3Cr2O8

Magnetoelectric coupling in a frustrated spinel studied using high-field scanning probe microscopy

Site-Selective NMR in the Quasi-1D Conductor beta-Sr0.33V2O5

Diamond-shaped quantum circuit for real-time quantum dynamics in one dimension

Synchrotron x-ray study of lattice vibrations in CdCr2O4

Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr2​O4​

Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr2​O4​

QCD critical point in the strong coupling lattice QCD and during black hole formation

Universal magnetic structure of the half-magnetization phase in Cr-based spinels

Orbital and spin chains in ZnV2O4

Entanglement Entropy of the Two-Dimensional +-J Ising Model on the Nishimori Line

Negative thermal expansion in the plateau state of a magnetically-frustrated spinel

Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba3​Cr2​O8​

Charge dynamics and "ferromagnetism" of A1-xLaxB6 (A=Ca and Sr)

Efficient NMR measurement and data analysis supported by the Bayesian inference : The case of the heavy fermion compound YbCo2Zn20

s-process branching at 185W revised

Spin-lattice instability to a fractional magnetization state in the spinel HgCr2O4

Quasi-one-dimensional spin dynamics in LiV2O4: 1D-to-3D crossover as a possible origin of heavy fermion state

Coherent control of orbital wavefunctions in the quantum spin liquid $T b_{2} T i_{2} O_{7}$

Spin-orbit fluctuations in frustrated heavy-fermion metal LiV $_{2}$ O $_{4}$

Weakly coupled $s = 1/2$ quantum spin singlets in Ba $_{3}$ Cr $_{2}$ O $_{8}$

Magnetic field dependent cycloidal rotation in pristine and Ge doped CoCr $_{2}$ O $_{4}$

Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr $_{2}$ O $_{4}$

Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr $_{2}$ O $_{4}$

Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba $_{3}$ Cr $_{2}$ O $_{8}$