102 citations · 642 across the 27 of their papers we have counts for
27 papers
The Reverse Quantum Limit: Implications for Unconventional Quantum Oscillations in YbB
Christopher A. Mizzi, Satya K. Kushwaha, Priscila F. S. Rosa +6
Beyond the quantum limit, many-body effects are expected to induce unusual electronic phase transitions. Materials possessing metallic ground states with strong interactions betwee…
Topological surface states in the Kondo insulator YbB revealed via planar tunneling spectroscopy
A. Gupta, A. Weiser, L. H. Greene +8
Planar tunneling spectroscopy of the Kondo insulator SmB suggests that an interaction between the surface Dirac fermions and the bulk spin excitons results in incompletely prot…
Laser floating zone growth of SrVO single crystals
Tanya Berry, Shannon Bernier, Gudrun Auffermann +2
The perovskite SrVO is of interest for a variety of applications due to its simple metallic character and stability in reducing environments. Here we report the preparation of…
Instabilities of heavy magnons in an anisotropic magnet
Xiaojian Bai, Shang-Shun Zhang, Hao Zhang +5
The search for new elementary particles is one of the most basic pursuits in physics, spanning from subatomic physics to quantum materials. Magnons are the ubiquitous elementary qu…
Topological nature of the Kondo insulator SmB and its sensitiveness to Sm vacancy
W. K. Park, J. A. Sittler, L. H. Greene +5
The true topological nature of the Kondo insulator SmB remains to be unveiled. Our previous tunneling study not only found evidence for the existence of surface Dirac fermions,…
Twisting of 2D kagomé sheets in layered intermetallics
Mekhola Sinha, Hector K. Vivanco, Cheng Wan +11
Chemical bonding in 2D layered materials and van der Waals solids is central to understanding and harnessing their unique electronic, magnetic, optical, thermal and superconducting…
Observation of 4- and 6-magnon bound-states in the spin-anisotropic frustrated antiferromagnet FeI
Anaëlle Legros, Shang-Shun Zhang, Xiaojian Bai +6
Spin-waves e.g. magnons are the conventional elementary excitations of ordered magnets. However, other possibilities exist. For instance, magnon bound-states can arise due to attra…
Bulk transport paths through defects in floating zone and Al flux grown SmB
Yun Suk Eo, Alexa Rakoski, Shriya Sinha +16
We investigate the roles of disorder on low-temperature transport in SmB crystals grown by both the Al flux and floating zone methods. We used the inverted resistance method wi…
Tuning quantum transport by controlling spin reorientations in Dirac semimetal candidates EuSrMnSb
Qiang Zhang, Jinyu Liu, Huibo Cao +4
Magnetic topological semimetals have attracted intense attention recently since these materials carry a great promise for potential applications in novel spintronic devices. Here,…
Introduction of spin centers in single crystals of BaCaWO
Mekhola Sinha, Tyler J. Pearson, Tim R. Reeder +4
Developing the field of quantum information science (QIS) hinges upon designing viable qubits, the smallest unit in quantum computing. One approach to creating qubits is introducin…
Kondo exhaustion and conductive surface states in antiferromagnetic YbIrSi
Macy Stavinoha, C. -L. Huang, W. Adam Phelan +13
The interplay of Kondo screening and magnetic ordering in strongly correlated materials containing local moments is a subtle problem.[1] Usually the number of conduction electrons…
Diamagnetic Sm in the topological Kondo insulator SmB
W. T. Fuhrman, J. C. Leiner, J. W. Freeland +5
Samarium hexaboride is a topological Kondo insulator, with metallic surface states manifesting from its insulating band structure. Since the insulating bulk itself is driven by str…
Doping-induced magnetism in the semiconducting B20 compound RuGe
Mojammel A. Khan, D. P. Young, P. W. Adams +5
RuGe, a diamagnetic small-band gap semiconductor, and CoGe, a nonmagnetic semimetal, are both isostructural to the Kondo insulator FeSi and the skyrmion lattice host MnSi. Here, we…
An effect of Sm vacancies on the hybridization gap in topological Kondo insulator candidate SmB
Michael E. Valentine, Seyed Koohpayeh, W. Adam Phelan +4
A necessary element for the predicted topological state in Kondo insulator SmB is the hybridization gap which opens in this compound at low temperatures. In this work, we prese…
Impurities or a neutral Fermi surface? A further examination of the low-energy ac optical conductivity of SmB
N. J. Laurita, C. M. Morris, S. M. Koohpayeh +3
Recent experiments have uncovered evidence of low energy excitations in the bulk of SmB that are perhaps associated with unconventional quasiparticles, bringing into question w…
Field-dependent heat transport in the Kondo insulator SmB6 : phonons scattered by magnetic impurities
M-E. Boulanger, F. Laliberté, M. Dion +12
The thermal conductivity of the Kondo insulator SmB was measured at low temperature, down to 70 mK, in magnetic fields up to 15 T, on single crystals grown using both the f…
Incommensurate magnetism near quantum criticality in CeNiAsO
Shan Wu, W. A. Phelan, L. Liu +14
Two phase transitions in the tetragonal strongly correlated electron system CeNiAsO were probed by neutron scattering and zero field muon spin rotation. For = 8.7(3) K,…
Quantum oscillations and a non-trivial Berry phase in the noncentrosymmetric superconductor BiPd
Mojammel A. Khan, D. E. Graf, D. Browne +4
We report the measurements of de Haas-van Alphen (dHvA) oscillations in the noncentrosymmetric superconductor BiPd. Several pieces of a complex multi-sheet Fermi surface are identi…
Effect of Negative Pressure on the Prototypical Itinerant Magnet MnSi
C. Dhital, M. A Khan, M. Saghayezhian +4
The evolution of the magnetic and charge transport properties of itinerant magnetic metal MnSi with the substitution of Al and Ga on the Si site is investigated. We observe an incr…
Breakdown of the Kondo insulating state in SmB6 by introducing Sm vacancies
Michael E. Valentine, Seyed Koohpayeh, W. Adam Phelan +4
SmB6 is a proposed topological Kondo insulator where the presence of topological nontriviality can be tuned by variations in the Sm valence. Experimentally, Sm valence can be chang…
On the Chemistry and Physical Properties of Flux and Floating Zone Grown SmB6 Single Crystals
W. A. Phelan, S. M. Koohpayeh, P. Cottingham +8
Recent theoretical and experimental findings suggest that the long-known but not well understood low temperature resistance plateau of SmB6 may originate from protected surface sta…
Interaction Driven Subgap Spin Exciton in the Kondo Insulator SmB6
W. T. Fuhrman, J. Leiner, P. Nikolić +12
Using inelastic neutron scattering, we map a 14 meV coherent resonant mode in the topological Kondo insulator SmB6 and describe its relation to the low energy insulating band struc…
Correlation between bulk thermodynamic measurements and the low temperature resistance plateau in SmB6
W. A. Phelan, S. M. Koohpayeh, P. Cottingham +4
Topological insulators are materials characterized by dissipationless, spin-polarized surface states resulting from non-trivial band topologies. Recent theoretical models and exper…
Ferromagnetic Quantum Critical Point in FeGa3 Tuned by Mixed-Valence Fe Dimers
N. Haldolaarachchige, J. Prestigiacomo, W. Adam Phelan +9
The magnetic, transport, and thermal properties of single crystals of the series Fe(Ga1-xGex)3 are reported. Pure FeGa3 is a nonmagnetic semiconductor, that when doped with small c…