175 citations · 639 across the 28 of their papers we have counts for
29 papers
Magnetic-field-induced insulating behavior in black phosphorus under pressure
Kazuto Akiba, Yuzuki Sega, Yuichi Akahama +3
We investigated the out-of-plane magnetoresistance of pressurized black phosphorus (BP) with a longitudinal field configuration. Despite the absence of the Lorentz force in the pre…
Non-linear transport in field-induced insulating states of graphite
Masashi Tokunaga, Kazuto Akiba, Hiroshi Yaguchi +2
Graphite exhibits multi-stage phase transitions in the quantum-limit states realized by magnetic fields applied along the c-axis. Despite extensive studies on this phenomenon, the…
Topological Hall Effect in PrSb
Shingo Araki, Hinata Izumida, Kazuto Akiba +2
PrSb exhibits a charge-density wave (CDW) transition at K and antiferromagnetic (AFM) ordering at K at ambient pressure. Hall resistiv…
Vector pulse magnet
Kosuke Noda, Kenta Seki, Dilip Bhoi +3
The underlying symmetry of the crystal, electronic structure, and magnetic structure manifests itself in the anisotropy of materials' properties, which is a central topic of the pr…
A concise 40 T pulse magnet for condensed matter experiments
Akihiko Ikeda, Kosuke Noda, Kotomi Shimbori +6
There is a growing interest in using pulsed high magnetic field as a controlling parameter of physical phenomena in various scientific disciplines, such as condensed matter physics…
Realization of nodal ring semimetal in pressurized black phosphorus
Kazuto Akiba, Yuichi Akahama, Masashi Tokunaga +1
Topological semimetals are intriguing targets for exploring unconventional physical properties of massless fermions. Among them, nodal line or nodal ring semimetals have attracted…
Superconductivity in a ferroelectric-like topological semimetal SrAuBi
Hidefumi Takahashi, Tomohiro Sasaki, Akitoshi Nakano +6
Given the rarity of metallic systems that exhibit ferroelectric-like transitions, it is apparently challenging to find a system that simultaneously possesses superconductivity and…
Phonon-mediated superconductivity in the Sb-square-net compound LaCuSb
Kazuto Akiba, Tatsuo C. Kobayashi
We investigated the electronic structure and superconducting properties of single-crystalline LaCuSb. The resistivity, magnetization, and specific heat measurements showed that…
Superconductivity in a Magnetic Rashba Semimetal EuAuBi
Hidefumi Takahashi, Kazuto Akiba, Masayuki Takahashi +4
We report the observation of superconductivity with multiple magnetic ordering and Rashba-type spin-orbit coupling in a layered polar semimetal EuAuBi. Magnetic transition is obser…
Observation of superconductivity and its enhancement at the charge density wave critical point in LaAgSb
Kazuto Akiba, Nobuaki Umeshita, Tatsuo C. Kobayashi
We discover superconductivity (SC) in LaAgSb at ambient pressure and its close correlation with a charge density wave (CDW) under pressure. The superconducting transition tempe…
Experimental determination of tantalum L-shell fluorescence yields and Coster-Kronig transition probabilities
Nils Wauschkuhn, Katja Frenzel, Burkhard Beckhoff +1
Using radiometrically calibrated instrumentation of Physikalisch-Technische Bundesanstalt, the L-shell fluorescence yields and Coster-Kronig factors of tantalum (including the unce…
Spin-orbit-derived giant magnetoresistance in a layered magnetic semiconductor AgCrSe2
Hidefumi Takahashi, Tomoki Akiba, Alex Hiro Mayo +6
Two-dimensional magnetic materials have recently attracted great interest due to their unique functions as the electric field control of a magnetic phase and the anomalous spin Hal…
Magnetotransport studies of the Sb square-net compound LaAgSb under high pressure and rotating magnetic fields
Kazuto Akiba, Nobuaki Umeshita, Tatsuo C. Kobayashi
Square-net-layered materials have attracted attention as an extended research platform of Dirac fermions and of exotic magneto-transport phenomena. In this study, we investigated t…
Successive destruction of charge density wave states by pressure in LaAgSb
Kazuto Akiba, Hiroaki Nishimori, Nobuaki Umeshita +1
We comprehensively studied the magnetotransport properties of LaAgSb under high pressure up to 4 GPa, which showed unique successive charge density wave (CDW) transitions at $T…
Anomalous Hall effect triggered by pressure-induced magnetic phase transition in -Mn
Kazuto Akiba, Kaisei Iwamoto, Takaaki Sato +2
Recent interest in topological nature in condensed matter physics has revealed the essential role of Berry curvature in anomalous Hall effect (AHE). However, since large Hall respo…
Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7
Satoshi Tajima, Daigorou Hirai, Yuto Kinoshita +5
The 5d pyrochlore oxide Cd2Re2O7 exhibits successive phase transitions from a cubic pyrochlore structure (phase I) to a tetragonal structure without inversion symmetry below Ts1 of…
Magneto-transport properties of tellurium under extreme conditions
Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi +5
This study investigates the transport properties of a chiral elemental semiconductor tellurium (Te) under magnetic fields and pressure. Application of hydrostatic pressure reduces…
Pressure-Temperature Phase Diagram of -Mn
Takaaki Sato, Kazuto Akiba, Shingo Araki +1
Electrical resistivity and ac-susceptibility measurements under high pressure were carried out in high-quality single crystals of -Mn. The pressure-temperature phase diagram con…
Large Enhancement of Thermoelectric Efficiency Due to a Pressure-Induced Lifshitz Transition in SnSe
T. Nishimura, H. Sakai, H. Mori +10
Lifshitz transition, a change in Fermi surface topology, is likely to greatly influence exotic correlated phenomena in solids, such as high-temperature superconductivity and comple…
Quantized surface transport in topological Dirac semimetal films
Shinichi Nishihaya, Masaki Uchida, Yusuke Nakazawa +7
Unconventional surface states protected by non-trivial bulk orders are sources of various exotic quantum transport in topological materials. One prominent example is the unique mag…
Quantitative evaluation of Dirac physics in PbTe
Kazuto Akiba, Atsushi Miyake, Hideaki Sakai +7
The magnetic field dependence of electronic transport, magnetic, and elastic properties in single crystals of PbTe were investigated in high magnetic fields up to 55 T. The magneto…
Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi
H. Masuda, H. Sakai, M. Tokunaga +7
We report spin-split Landau levels of quasi-two-dimensional Dirac fermions in a layered antiferromagnet EuMnBi, as revealed by interlayer resistivity measurements in a tilted m…
Negative magnetoresistance suppressed through topological phase transition in (Cd1-xZnx)3As2 films
S. Nishihaya, M. Uchida, Y. Nakazawa +7
The newly discovered topological Dirac semimetals host the possibilities of various topological phase transitions through the control of spin-orbit coupling as well as symmetries a…
Observation of Poiseuille Flow of Phonons in Black Phosphorus
Yo Machida, Alaska Subedi, Kazuto Akiba +5
The travel of heat in insulators is commonly pictured as a flow of phonons scattered along their individual trajectory. In rare circumstances, momentum-conserving collision events…