Publications (28)
Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
S. M. Thomas, F. B. Santos, M. H. Christensen +7
UTe is a recently discovered unconventional superconductor that has attracted much interest due to its many intriguing properties - a large residual density-of-states in the su…
Evidence for the first-order topological phase transition in a Kitaev spin liquid candidate -RuCl
S. Suetsugu, Y. Ukai, M. Shimomura +9
The Kitaev quantum spin liquid (QSL) on the two-dimensional honeycomb lattice epitomizes an entangled topological state, where the spins fractionalize into Majorana fermions. This…
Colossal anomalous Nernst effect in a correlated noncentrosymmetric kagome ferromagnet
T. Asaba, V. Ivanov, S. M. Thomas +4
Analogous to the Hall effect, the Nernst effect is the generation of a transverse voltage due to a temperature gradient in the presence of a perpendicular magnetic field. The Nerns…
Quantum spin liquids by geometric lattice design
Xiaoran Liu, T. Asaba, Qinghua Zhang +12
On a lattice composed of triangular plaquettes where antiferromagnetic exchange interactions between localized spins cannot be simultaneously satisfied, the system becomes geometri…
Quantum Oscillations of Electrical Resistivity in an Insulator
Z. Xiang, Y. Kasahara, T. Asaba +13
In metals, orbital motions of conduction electrons on the Fermi surface are quantized in magnetic fields, which is manifested by quantum oscillations in electrical resistivity. Thi…
Ferromagnetism and conductivity in atomically thin SrRuO3
H. Boschker, T. Harada, T. Asaba +13
Atomically thin ferromagnetic and conducting electron systems are highly desired for spintronics, because they can be controlled with both magnetic and electric fields. We present…
Magnetothermal transport in ultraclean single crystals of Kitaev magnet -RuCl
Y. Xing, R. Namba, K. Imamura +7
The layered honeycomb magnet -RuCl has emerged as a promising candidate for realizing a Kitaev quantum spin liquid. Previous studies have reported oscillation-like anomalie…
Gapless spin excitations in a quantum spin liquid state of S=1/2 perfect kagome antiferromagnet
S. Suetsugu, T. Asaba, S. Ikemori +8
Quantum spin liquids (QSLs) represent an exotic quantum many-body state characterized by the suppression of long-range magnetic order due to strong quantum fluctuations. The kagome…
Large Tunable Anomalous Hall Effect in the Kagom Antiferromagnet URuAl
T. Asaba, Ying Su, M. Janoschek +5
The Berry curvature in magnetic systems is attracting interest due to the potential tunability of topological features via the magnetic structure. -electrons, with their large s…
Imaging quantum interference in a monolayer Kitaev quantum spin liquid candidate
Y. Kohsaka, S. Akutagawa, S. Omachi +16
Single atomic defects are prominent windows to look into host quantum states because collective responses from the host states emerge as localized states around the defects. Friede…
Evidence for a finite-momentum Cooper pair in tricolor -wave superconducting superlattices
T. Asaba, M. Naritsuka, H. Asaeda +9
Fermionic superfluidity with a nontrivial Cooper-pairing, beyond the conventional Bardeen-Cooper-Schrieffer state, is a captivating field of study in quantum many-body systems. In…
Universal scaling of the specific heat in quantum kagome antiferromagnet herbertsmithite
H. Murayama, T. Tominaga, T. Asaba +9
Despite tremendous investigations, a quantum spin liquid state realized in spin-1/2 kagome Heisenberg antiferromagnet remains largely elusive. In herbertsmithite ZnCu(OH)Cl…
Quantized and unquantized thermal Hall conductance of Kitaev spin-liquid candidate -RuCl
Y. Kasahara, S. Suetsugu, T. Asaba +5
Despite extensive investigations, a topological state that hosts Majorana edge modes in the magnetic field-induced quantum disordered state of the Kitaev candidate material -Ru…
Evidence for an odd-parity nematic phase above the charge density wave transition in kagome metal CsVSb
T. Asaba, A. Onishi, Y. Kageyama +16
The quest for fascinating quantum states arising from the interplay between correlation, frustration, and topology is at the forefront of condensed-matter physics. Recently discove…
Emergent spin-gapped magnetization plateaus in a spin-1/2 perfect kagome antiferromagnet
S. Suetsugu, T. Asaba, Y. Kasahara +7
The two-dimensional (2D) spin-1/2 kagome Heisenberg antiferromagnet is believed to host quantum spin liquid (QSL) states with no magnetic order, but its ground state remains largel…
Bulk Rotational Symmetry Breaking in Kondo Insulator SmB6
Z. Xiang, B. Lawson, T. Asaba +5
Kondo insulator samarium hexaboride (SmB6) has been intensely studied in recent years as a potential candidate of a strongly correlated topological insulator. One of the most excit…
Exotic heavy fermion superconductivity in atomically thin CeCoIn films
L. Peng, M. Naritsuka, S. Akutagawa +7
We report an {\it in-situ} scanning tunneling microscopy study of atomically thin films of CeCoIn, a -wave heavy-fermion superconductor. Both hybridization and superconducti…
Survival of itinerant excitations and quantum spin state transitions in YbMgGaO with chemical disorder
X. Rao, G. Hussain, Q. Huang +17
A recent focus of quantum spin liquid (QSL) studies is how disorder/randomness in a QSL candidate affects its true magnetic ground state. The ultimate question is whether the QSL s…
Quantum Critical Scaling in Quasi-One-Dimensional YbFeP
E. D. Bauer, K. E. Avers, T. Asaba +9
We report measurements of the low temperature magnetization and specific heat as a function of temperature and magnetic field of the quasi-one-dimensional spin chain, heavy…
Quantum oscillations in Kondo Insulator SmB
G. Li, Z. Xiang, F. Yu +15
In Kondo insulator samarium hexaboride SmB, strong correlation and band hybridization lead to an insulating gap and a diverging resistance at low temperature. The resistance di…
Photon Frequency Bears More At Less
T. Asaba, S. Fukatsu
Construction of an optical quantum computer (OQC) is finished by implementing all necessary ingredients with light (photon). There is, however, one more hurdle to clear. It is scal…
Consistency of Photoemission and Quantum Oscillations for Surface States of SmB6
J. D. Denlinger, Sooyoung Jang, G. Li +11
The mixed valent compound SmB6 is of high current interest as the first candidate example of topologically protected surface states in a strongly correlated insulator and also as a…
Unconventional thermal metallic state of charge-neutral fermions in an insulator
Y. Sato, Z. Xiang, Y. Kasahara +13
Quantum oscillations (QOs) in transport and thermodynamic parameters at high magnetic fields are an unambiguous signature of the Fermi surface, the defining characteristic of a met…
Microscopic evidence for imaginary charge density wave in a kagome metal
S. Suetsugu, F. Hori, M. Shibata +9
Dissipationless charge transport without any energy loss is one of the most fascinating phenomena in condensed matter physics. This extraordinary state manifests in two well-establ…
Quantum Oscillations in CuBiSe in High Magnetic Fields
B. J. Lawson, G. Li, F. Yu +6
CuBiSe has drawn much attention as the leading candidate to be the first topological superconductor and the realization of coveted Majorana particles in a condensed mat…
Probing quantum criticality in ferromagnetic CeRh6Ge4
S. M. Thomas, S. Seo, T. Asaba +4
CeRhGe is unusual in that its ferromagnetic transition can be suppressed continuously to zero temperature, i.e., to a ferromagnetic quantum-critical point (QCP), through th…
Fully gapped pairing state in spin-triplet superconductor UTe
S. Suetsugu, M. Shimomura, M. Kamimura +14
Spin-triplet superconductors provide an ideal platform for realizing topological superconductivity with emergent Majorana quasiparticles. The promising candidate is the recently di…
Anomalous Hall Effect in Kagome Ferrimagnet GdMnSn
T. Asaba, S. M. Thomas, M. Curtis +3
We present magnetotransport data on the ferrimagnet GdMnSn. From the temperature dependent data we are able to extract a large instrinsic contribution to the anomalous Hall…