294 citations · 1.4k across the 24 of their papers we have counts for
24 papers
Zero-field current-induced Hall effect in ferrotoroidic metal
K. Ota, M. Shimozawa, T. Muroya +7
We have performed precise Hall measurements for the ferrotoroidic candidate material UNi4B. Below Neel temperature TN ~ 20 K (corresponding to the ferrotoroidic transition temperat…
Thermal Hall Effects of Spins and Phonons in Kagome Antiferromagnet Cd-Kapellasite
Masatoshi Akazawa, Masaaki Shimozawa, Shunichiro Kittaka +7
We have investigated the thermal-transport properties of the kagome antiferromagnet Cd-kapellasite (Cd-K). We find that a field suppression effect on the longitudinal thermal condu…
Ultralow temperature NMR of CeCoIn
M. Yamashita, M. Tashiro, K. Saiki +7
We have performed Co NMR measurements of CeCoIn down to ultralow temperatures. We find that the temperature dependence of the spin-echo intensity provides a good measure…
Spintronic superconductor in a bulk layered material with natural spin-valve structure
Shunsuke Sakuragi, S. Sasaki, R. Akashi +29
Multi-layered materials provide fascinating platforms to realize various functional properties, possibly leading to future electronic devices controlled by external fields. In part…
Anomalous thermal Hall effect in the topological antiferromagnetic state
Kaori Sugii, Yusuke Imai, Masaaki Shimozawa +8
The anomalous Hall effect (AHE), a Hall signal occurring without an external magnetic field, is one of the most significant phenomena. However, understanding the AHE mechanism has…
Spin Thermal Hall Conductivity of a Kagomé Antiferromagnet
Hayato Doki, Masatoshi Akazawa, Hyun-Yong Lee +7
A clear thermal Hall signal () was observed in the spin liquid phase of the kagomé antiferromagnet Ca kapellasite (CaCu(OH)ClHO). We found…
Anomalous change in the de Haas-van Alphen oscillations of CeCoIn at ultra-low temperatures
Hiroaki Shishido, Shogo Yamada, Kaori Sugii +3
We have performed de Haas-van Alphen (dHvA) measurements of the heavy-fermion superconductor CeCoIn down to 2 mK above the upper critical field. We find that the dHvA amplitude…
Emergent exotic superconductivity in artificially-engineered tricolor Kondo superlattices
M. Naritsuka, T. Ishii, S. Miyake +7
In the quest for exotic superconducting pairing states, the Rashba effect, which lifts the electron-spin degeneracy as a consequence of strong spin-orbit interaction (SOI) under br…
Unusual thermal Hall effect in a Kitaev spin liquid candidate -RuCl
Y. Kasahara, K. Sugii, T. Ohnishi +8
The Kitaev quantum spin liquid displays the fractionalization of quantum spins into Majorana fermions. The emergent Majorana edge current is predicted to manifest itself in the for…
Magnetic and superconducting properties of the heavy-fermion CeCoIn5 epitaxial film probed by nuclear quadrupole resonance
Takayoshi Yamanaka, Masaaki Shimozawa, Hiroaki Shishido +6
Since the progress in the fabrication techniques of thin-films of exotic materials such as strongly correlated heavy-fermion compounds, microscopic studies of the magnetic and elec…
Quantum-disordered state of magnetic and electric dipoles in a hydrogen-bonded Mott system
M. Shimozawa, K. Hashimoto, A. Ueda +12
Strongly enhanced quantum fluctuations often lead to a rich variety of quantum-disordered states. A representative case is liquid helium, in which zero-point vibrations of the heli…
Thermal Hall effect in a phonon-glass BaCuSbO
Kaori Sugii, Masaaki Shimozawa, Daiki Watanabe +6
A distinct thermal Hall signal is observed in a quantum spin liquid candidate BaCuSbO. The transverse thermal conduction shows a power-law temperature dependence below…
Emergence of nontrivial magnetic excitations in a spin liquid state of kagome volborthite
Daiki Watanabe, Kaori Sugii, Masaaki Shimozawa +7
When quantum fluctuations destroy underlying long-range ordered states, novel quantum states emerge. Spin-liquid (SL) states of frustrated quantum antiferromagnets, in which highly…
Tuning of magnetic quantum criticality in artificial Kondo superlattice CeRhIn5/YbRhIn5
T. Ishii, R. Toda, Y. Hanaoka +8
The effects of reduced dimensions and the interfaces on antiferromagnetic quantum criticality are studied in epitaxial Kondo superlattices, with alternating layers of heavy-fer…
From Kondo Lattices to Kondo Superlattices
Masaaki Shimozawa, Swee K. Goh, Takasada Shibauchi +1
Realizing new classes of ground states in strongly correlated electron systems continues to be at the forefront of condensed matter physics. Heavy-fermion materials, whose electron…
Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
J. P. Sun, K. Matsuura, G. Z. Ye +12
The coexistence and competition between superconductivity and electronic orders, such as spin or charge density waves, have been a central issue in high transition-temperature (${T…
Charge Carrier Dynamics of the Heavy Fermion Metal CeCoIn Probed by THz Spectroscopy
Uwe S. Pracht, Julian Simmendinger, Martin Dressel +8
We discuss the charge carrier dynamics of the heavy-fermion compound CeCoIn in the metallic regime measured by means of quasi-optical THz spectroscopy. The transmittance of ele…
The interface between heavy fermions and normal electrons investigated by spatially-resolved nuclear magnetic resonance
Takayoshi Yamanaka, Masaaki Shimozawa, Ryota Endo +6
We have studied the superlattices with alternating block layers (BLs) of heavy-fermion superconductor CeCoIn5 and conventional-metal YbCoIn5 by site-selective nuclear magnetic reso…
Controllable Rashba spin-orbit interaction in artificially engineered superlattices involving the heavy-fermion superconductor CeCoIn5
M. Shimozawa, S. K. Goh, R. Endo +9
By using a molecular beam epitaxy technique, we fabricate a new type of superconducting superlattices with controlled atomic layer thicknesses of alternating blocks between heavy f…
Strong suppression of superconductivity by divalent Ytterbium Kondo-holes in CeCoIn_5
M. Shimozawa, T. Watashige, S. Yasumoto +7
To study the nature of partially substituted Yb-ions in a Ce-based Kondo lattice, we fabricated high quality Ce_{1-x}Yb_xCoIn_5 epitaxial thin films using molecular beam epitaxy. W…
Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a Rashba-type Heavy Fermion Interface
S. K. Goh, Y. Mizukami, H. Shishido +9
We report a highly unusual angular variation of the upper critical field (H_c2) in epitaxial superlattices CeCoIn_5(n)/YbCoIn_5(5), formed by alternating layers of n and a 5 unit-c…
Extremely strong coupling superconductivity in artificial two-dimensional Kondo lattices
Y. Mizukami, H. Shishido, T. Shibauchi +8
When interacting electrons are confined to low-dimensions, the electron-electron correlation effect is enhanced dramatically, which often drives the system into exhibiting behavior…
Anomalous Temperature Dependence of Lower Critical Field in Ultraclean URuSi
R. Okazaki, M. Shimozawa, H. Shishido +7
To investigate a mysterious superconducting state of URu_2Si_2 embedded in the so-called hidden order state, the lower critical field H_{c1} is precisely determined down to 55 mK f…
Lower Critical Fields of Superconducting PrFeAsO Single Crystals
R. Okazaki, M. Konczykowski, C. J. van der Beek +12
We have studied the lower critical fields H_{c1} of superconducting iron oxipnictide PrFeAsO_{1-y} single crystals for H parallel and perpendicular to the ab-planes. Measurements o…