228 citations · 1.7k across the 25 of their papers we have counts for
9 papers · 1 filter
Enhancing thermopower and Nernst signal of high-mobility Dirac carriers by Fermi level tuning in the layered magnet EuMnBi
Keigo Tsuruda, Kento Nakagawa, Masayuki Ochi +5
Dirac/Weyl semimetals hosting linearly-dispersing bands have received recent attention for potential thermoelectric applications, since their ultrahigh-mobility carriers could gene…
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…
Microwave non-reciprocity of magnon excitations in a non-centrosymmetric antiferromagnet BaMnGeO
Y. Iguchi, Y. Nii, M. Kawano +3
We have investigated the microwave non-reciprocity for a non-centrosymmetric antiferromagnet BaMnGeO. The magnon modes expected by the conventional spin wave theory for…
Landau Level Spectroscopy of Dirac Electrons in a Polar Semiconductor with Giant Rashba Spin Splitting
Sándor Bordács, Joseph G. Checkelsky, Hiroshi Murakawa +2
Optical excitations of BiTeI with large Rashba spin splitting have been studied in an external magnetic field () applied parallel to the polar axis. A sequence of transitions be…
Four-coloured Spin-wave Excitations in Multiferroic Materials
Istvan Kezsmarki, David Szaller, Sandor Bordacs +5
The optical magnetoelectric effect, which is an inherent attribute of the spin excitations in multiferroics, drastically changes their optical properties compared to conventional m…
Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
M. Sakano, M. S. Bahramy, A. Katayama +12
We investigate the two-dimensional (2D) highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X = I, Br, and…
Three-dimensional bulk band dispersion in polar BiTeI with giant Rashba-type spin splitting
M. Sakano, J. Miyawaki, A. Chainani +12
In layered polar semiconductor BiTeI, giant Rashba-type spin-split band dispersions show up due to the crystal structure asymmetry and the strong spin-orbit interaction. Here we in…
Mechanisms of enhanced orbital dia- and paramagnetism: Application to the Rashba semiconductor BiTeI
G. A. H. Schober, H. Murakawa, M. S. Bahramy +4
We study the magnetic susceptibility of a layered semiconductor BiTeI with giant Rashba spin splitting both theoretically and experimentally to explore its orbital magnetism. Apart…
Giant directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic oxide BaCoGeO
I. Kezsmarki, N. Kida, H. Murakawa +3
We propose that concurrently magnetic and ferroelectric, i.e. multiferroic, compounds endowed with electrically-active magnetic excitations (electromagnons) provide a key to produc…