Article
Chemistry, Multidisciplinary
Juuso Manninen, Antti Laitinen, Francesco Massel, Pertti Hakonen
Summary: In this work, we investigate the dynamics of a graphene Corbino disk supported by a gold mechanical resonator under the influence of a magnetic field. We find that our graphene/gold mechanical structure exhibits a nontrivial resonance frequency dependence on the applied magnetic field, which indicates the presence of the de Haas-van Alphen effect in the graphene Corbino disk. Our detection scheme, based on the mechanical resonances of the gold structure, is material-independent and can be used for dHvA measurements on any conducting 2D material. This scheme is expected to be a valuable tool for studying centrosymmetric transition metal dichalcogenide (TMD) crystals and exploring hidden magnetization and interaction effects.
Article
Physics, Condensed Matter
Souvik Sasmal, Gourav Dwari, Bishal Baran Maity, Vikas Saini, A. Thamizhavel, Rajib Mondal
Summary: Anisotropic transport and quantum oscillations were studied on a high-quality CoSi single crystal grown by the Czochralski method. The dominant scattering mechanism was found to be electron-electron scattering, and the electrons were identified as the majority carriers with no electron-hole compensation. The effective masses and Dingle temperatures were calculated from the oscillation data.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Chengxu Liu, Bin Li, Yongheng Ge, Chuanying Xi, Yi Liu, Chunqiang Xu, Qi Lu, Yunlong Li, Hang-Qiang Qiu, Qin-Qing Zhu, Yu-Ke Li, Zhi Ren, Ziming Zhu, Dong Qian, Xianglin Ke, Xiaofeng Xu, Wen-He Jiao
Summary: The search for quantum materials with symmetry-protected topological states has attracted significant research interest due to their intriguing physical properties and potential technological applications. In this study, the researchers report on the magnetotransport, de Haas-van Alphen oscillations, and first-principles calculations of Cu3Sn, a stannide isostructural to the recently reported topological semimetal Ag3Sn. The experimental results show quasi-linear magnetoresistance and clear dHvA oscillations, indicating possible nontrivial band topology and the presence of topological Dirac fermions in Cu3Sn.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ikuto Kawasaki, Kazuharu Takeuchi, Shin-ichi Fujimori, Yukiharu Takeda, Hiroshi Yamagami, Etsuji Yamamoto, Yoshinori Haga
Summary: Angle-resolved photoemission spectroscopy (ARPES) experiments were performed to investigate the electronic structure of the heavy-fermion superconductor UPt3. The band structure of UPt3 was compared with density-functional calculations for ThPt3, and it was found that ThPt3 calculations provided a better description of the experimental band structure except for the heavy quasiparticle bands derived from 5f orbitals. The heavy quasiparticle bands were found to be renormalized by electron correlation effects and showed little temperature dependence.
Article
Physics, Condensed Matter
K. A. M. Hasan Siddiquee, Riffat Munir, Charuni Dissanayake, Xinzhe Hu, Swapnil Yadav, Yasumasa Takano, Eun Sang Choi, Duy Le, Talat S. Rahman, Yasuyuki Nakajima
Summary: Investigations on the topological semimetal CaSn3 reveal that the Fermi surfaces enclose an odd number of time-reversal-invariant momenta, meeting one of the criteria for realizing topological superconductivity. The observed quantum oscillations frequencies and nonzero Berry phases further support the nontrivial topological nature of CaSn3.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Astronomy & Astrophysics
Shu-Yun Yang, Ren-Da Dong, De-Fu Hou, Hai-Cang Ren
Summary: We investigated the interaction between magnetic field and rotation in the de Hass-van Alphen oscillation. The effect is diminished due to the reweighting of different angular momentum states within the same Landau level caused by rotation energy. The implications of our findings in high energy physics and condensed matter physics are discussed.
Article
Materials Science, Multidisciplinary
Dai-Nam Le, Van-Hoang Le, Pinaki Roy
Summary: This study investigates the effects of anisotropy of Fermi velocity on the structural Landau levels and de Haas-van Alphen quantum oscillations in a magnetized graphene sheet under the influence of linear uniaxial tensile strain and/or stress, coupled with an applied electrostatic voltage. The research also discusses the impact of the direction of the applied strain on the electronic properties of graphene.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Dai Aoki, Hironori Sakai, Petr Opletal, Yoshifumi Tokiwa, Jun Ishizuka, Youichi Yanase, Hisatomo Harima, Ai Nakamura, Dexin Li, Yoshiya Homma, Yusei Shimizu, Georg Knebel, Jacques Flouquet, Yoshinori Haga
Summary: This study reports the first observation of the de Haas-van Alphen (dHvA) effect in the novel spin-triplet superconductor UTe2. The researchers found that UTe2 has two types of cylindrical Fermi surfaces with strong corrugation, and the angular dependence of the dHvA frequencies is in good agreement with the calculated results.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Boris Khannanov, Evgeny Golovenchits, Mikhail Shcheglov, Viktoriya Sanina
Summary: This paper presents the results of a study on the magnetic dynamics of Y3Fe5O12 single crystals in the form of plates and spheres of various sizes. The study was conducted at frequencies exceeding 30 GHz, magnetic fields up to 18 kOe, at room temperature, and T = 77 K. It was found that the inhomogeneity of the magnetic state in these samples manifested as 2D local phase separation regions, which formed inside layered domain walls representing superlattices with sizes of 700-900 Å. Depending on the shape and size of the samples, either Landau diamagnetism or de Haas-van Alphen oscillations were observed in the 2D phase separation regions at room temperature and T = 77 K.
Article
Physics, Multidisciplinary
S. R. Julian
Summary: This study revisits the semiclassical theory of quantum oscillations in hybridization-gap insulators, and demonstrates that the physical mechanism behind the oscillations, at T = 0 K, is a sudden change in the diamagnetic moment of each Landau level as it crosses the hybridized region of the valence band.
CANADIAN JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
C. S. A. Muller, M. R. van Delft, M. Breitkreiz, T. Khouri, L. M. Schoop, A. Carrington, N. E. Hussey, S. Wiedmann
Summary: In this study, the structure of the high-frequency magnetic breakdown spectrum in HfSiS was revealed through a de Haas-van Alphen quantum oscillation study, and a number of breakdown orbits that were previously not observed in transport experiments were identified.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Feng Yang, Shilong Li, Shengwei Chi, Xiaoxu Wang, Shan Jiang, Huakun Zuo, Lingxiao Zhao, Gang Xu, Zengwei Zhu
Summary: Materials with square lattices of group IV or V elements provide a promising platform for topological phases to emerge. A study on LuPb2 single crystals reveals the presence of anisotropic Dirac dispersion and surface superconductivity, which are expected to provide a new platform for hosting anisotropic Dirac fermions and superconductivity. Additionally, LuPb2 shows a large quasilinear magnetoresistance primarily governed by the average carrier mobility.
Article
Materials Science, Multidisciplinary
Keshav Shrestha, Mengzhu Shi, Thinh Nguyen, Duncan Miertschin, Kaibao Fan, Liangzi Deng, David E. Graf, Xianhui Chen, Ching -Wu Chu
Summary: We studied the kagome superconductor RbV3Sb5 using torque magnetometry and found clear de Haas-van Alphen (dHvA) oscillations with eight frequencies ranging from approximately 150 to 3000 T. Angle-dependent measurements showed that all frequencies followed a 1/cos theta dependence, indicating two-dimensional Fermi surfaces. We also calculated the Berry phase and estimated the effective mass of charge carriers in RbV3Sb5, finding it to be heavier than other topological insulators. These findings on high frequencies and Fermi surfaces are crucial for understanding the properties of RbV3Sb5 and its relationship with other materials.
Article
Materials Science, Multidisciplinary
J. Hornung, S. Mishra, J. Stirnat, M. Raba, B. V. Schwarze, J. Klotz, D. Aoki, J. Wosnitza, T. Helm, I. Sheikin
Summary: In CeCoIn5, anomalies in resistivity at 22 T and nonmonotonic oscillations frequencies at 28 T were observed in static magnetic fields. These anomalies may be linked to the similar band structures in CeRhIn5 and CeIrIn5.
Article
Materials Science, Multidisciplinary
Yanglin Zhu, Jin Hu, David Graf, Xin Gui, Weiwei Xie, Zhiqiang Mao
Summary: The dHvA quantum oscillation studies on LuSn2 reveal enhanced 2D bands and relativistic fermions closer to the Fermi level compared to YSn2. The tunability of the relativistic band dimensionality in RESn2 based on electronegativity, as well as the enhanced spin-orbital coupling pushing 3D bands closer to the Fermi level, suggest potential for exploration of new topological states.
Article
Materials Science, Multidisciplinary
F. Mazzola, C-M Yim, V Sunko, S. Khim, P. Kushwaha, O. J. Clark, L. Bawden, I Markovic, D. Chakraborti, T. K. Kim, M. Hoesch, A. P. Mackenzie, P. Wahl, P. D. C. King
Summary: The study demonstrates a strong electron-magnon coupling at the Pd-terminated surface of the delafossite oxide PdCoO2 using a surface-sensitive spectroscopic approach. The coupling is found to be enhanced sevenfold with increasing surface disorder and charge carrier doping, driving the system into a polaronic regime with significant quasiparticle mass enhancement. This research sheds light on electron-magnon interactions in solid-state materials and how they can be controlled.
NPJ QUANTUM MATERIALS
(2022)
Article
Physics, Multidisciplinary
Maja D. Bachmann, Aaron L. Sharpe, Graham Baker, Arthur W. Barnard, Carsten Putzke, Thomas Scaffidi, Nabhanila Nandi, Philippa H. McGuinness, Elina Zhakina, Michal Moravec, Seunghyun Khim, Markus Konig, David Goldhaber-Gordon, Douglas A. Bonn, Andrew P. Mackenzie, Philip J. W. Moll
Summary: In a finite crystal, the shape of the crystal breaks the point-group symmetry, leading to changes in the material properties. Experimental results show that the strongly facetted Fermi surface and long quasiparticle mean free path in microstructures of PdCoO2 result in an in-plane resistivity anisotropy, which is forbidden by symmetry on an infinite hexagonal lattice. The direction of the narrow channel is identified as the source of symmetry breaking.
Article
Materials Science, Multidisciplinary
Celesta S. Chang, Jiaxin Sun, Seunghyun Khim, Andrew P. Mackenzie, Darrell G. Schlom, David A. Muller
Summary: By studying single crystals and epitaxial thin films, we have found that ribbonlike defects are dominant in single-crystal PdCoO2, while different types of defects arising from substrate termination disrupt the lateral connectivity of the conducting planes in thin films. To enhance the quality of PdCoO2 films, selecting a proper substrate, improving surface quality, and reducing the step density are key factors.
PHYSICAL REVIEW MATERIALS
(2022)
Review
Physics, Multidisciplinary
Sean A. Hartnoll, Andrew P. Mackenzie
Summary: The appearance of the Planckian time TPl in conventional and unconventional metals is reviewed. The various different timescales that characterize metals, such as quasiparticle, transport, and many-body timescales, are discussed. The possibility of a Planckian bound on dissipation is explored from both a quasiparticle and a many-body perspective.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Multidisciplinary Sciences
Hun-Ho Kim, Kentaro Ueda, Suguru Nakata, Peter Wochner, Andrew Mackenzie, Clifford Hicks, Giniyat Khaliullin, Huimei Liu, Bernhard Keimer, Matteo Minola
Summary: Research shows that magnons in Sr2IrO4 are highly sensitive to external strain, with small applied strains causing large variations in magnon energy. This finding opens up new possibilities for the design of reconfigurable magnonic devices.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
A. Chronister, M. Zingl, A. Pustogow, Yongkang Luo, D. A. Sokolov, F. Jerzembeck, N. Kikugawa, C. W. Hicks, J. Mravlje, E. D. Bauer, J. D. Thompson, A. P. Mackenzie, A. Georges, S. E. Brown
Summary: In this study, we performed nuclear magnetic resonance measurements of the oxygen-17 Knight shifts for Sr2RuO4 under uniaxial stress along the [100] direction. The resulting strain led to significant changes in the temperature and magnetic field dependence of the magnetic response. A quasiparticle description based on density-functional theory calculations, incorporating many-body renormalizations, successfully reproduced the experimental results and emphasized the importance of a van-Hove singularity. The strain was found to tune the Fermi-liquid coherence scale, driving it to lower values as the associated Lifshitz transition was approached.
NPJ QUANTUM MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
S. Nakata, P. Yang, M. E. Barber, K. Ishida, H. -H. Kim, T. Loew, M. Le Tacon, A. P. Mackenzie, M. Minola, C. W. Hicks, B. Keimer
Summary: In order to lay the foundation for theoretical models of high-temperature superconductivity, researchers have conducted experimental studies to establish a correspondence between macroscopic transport coefficients and atomic-scale correlation functions. However, the gradual onset of electronic ordering phenomena and the corresponding transport anomalies has made this research avenue difficult. By measuring the uniaxial-stress dependence of the normal-state resistivity and Hall coefficient of the underdoped high-temperature superconductor YBa2Cu3O6.67, the researchers observed a remarkable correspondence between the differential stress responses of the transport coefficients and resonant X-ray diffraction features indicative of charge ordering. However, they found that static charge order is not responsible for a sign reversal of the Hall coefficient, suggesting that the interplay with liquid-like, dynamical charge correlations is essential for the transport anomalies in the underdoped cuprates.
NPJ QUANTUM MATERIALS
(2022)
Article
Physics, Multidisciplinary
Belen E. Zuniga-Cespedes, Kaustuv Manna, Hilary M. L. Noad, Po-Ya Yang, Michael Nicklas, Claudia Felser, Andrew P. Mackenzie, Clifford W. Hicks
Summary: By applying a combination of uniaxial stress and magnetic field, we have observed a significant anomalous Hall effect in a bulk sample of a cubic member of the Mn3X family for the first time. The observed effect remains unchanged when the stress is removed, indicating that it is not induced by stress-induced ferromagnetic moments.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Edgar Abarca Morales, Gesa-R. Siemann, Andela Zivanovic, Philip A. E. Murgatroyd, Igor Markovic, Brendan Edwards, Chris A. Hooley, Dmitry A. Sokolov, Naoki Kikugawa, Cephise Cacho, Matthew D. Watson, Timur K. Kim, Clifford W. Hicks, Andrew P. Mackenzie, Phil D. C. King
Summary: We present the evolution of the electronic structure at the surface of Sr2RuO4 under large in-plane uniaxial compression, resulting in anisotropic B1g strains. Using angle-resolved photoemission, we observe a sequence of Lifshitz transitions that reshape the electronic structure and van Hove singularities on the surface. Our study reveals the nature of structural distortions at oxide surfaces and the possibility of controlling the density of state singularities for the realization of collective states at the Sr2RuO4 surface.
PHYSICAL REVIEW LETTERS
(2023)
Article
Instruments & Instrumentation
F. Sun, S. Mishra, P. H. McGuinness, Z. H. Filipiak, I. Markovic, D. A. Sokolov, N. Kikugawa, J. W. Orenstein, S. A. Hartnoll, A. P. Mackenzie, V. Sunko
Summary: We propose an optical method for directly measuring the position-dependent thermal diffusivity of reflective single crystal samples in condensed matter physics research. By using two laser beams, one to modulate the sample temperature and the other to probe sample reflectivity, we obtain the thermal diffusivity by analyzing the phase delay between the two signals. This technique can provide spatially resolved measurements and enhanced spatial resolution to a micron scale. We demonstrated the effectiveness of this method on two stoichiometric bilayer ruthenates and Ti-doped Ca3Ru2O7, revealing temperature-dependent diffusivity and inhomogeneity.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Materials Science, Multidisciplinary
Elina Zhakina, Philippa H. McGuinness, Markus Koenig, Romain Grasset, Maja D. Bachmann, Seunghyun Khim, Carsten Putzke, Philip J. W. Moll, Marcin Konczykowski, Andrew P. Mackenzie
Summary: High-energy electron irradiation is used to study the effects on PtCoO2, and it is found that this technique can transition from nonlocal to local transport behavior, thus determining the nature and extent of unconventional transport regimes.
Article
Materials Science, Multidisciplinary
Fabian Jerzembeck, Alexander Steppke, Andrej Pustogow, Yongkang Luo, Aaron Chronister, Dmitry A. Sokolov, Naoki Kikugawa, You-Sheng Li, Michael Nicklas, Stuart E. Brown, Andrew P. Mackenzie, Clifford W. Hicks
Summary: In-plane uniaxial pressure can strongly tune the superconducting state of Sr2RuO4 by approaching a Lifshitz transition and associated Van Hove singularity (VHS) in the density of states. The in-plane upper critical field is mostly linear in Tc, while the out-of-plane upper critical field varies with a higher power in Tc and peaks strongly at the VHS. The change in magnitude and form of Hc2||c occur very close to the Van Hove strain, pointing to a strong enhancement of both the density of states and the gap magnitude at the Lifshitz transition.
Article
Materials Science, Multidisciplinary
Mark E. Barber, Hun -ho Kim, Toshinao Loew, Matthieu Le Tacon, Matteo Minola, Marcin Konczykowski, Bernhard Keimer, Andrew P. Mackenzie, Clifford W. Hicks
Summary: We investigate the effect of in-plane uniaxial stress on Tc in the high-temperature superconductor YBa2Cu3O6.67. The response is highly anisotropic, with a flat Tc under compression along the b axis and a steep decrease under compression along the a axis. We propose that the suppression of superconductivity is due to competition with uniaxial charge density wave order.
Article
Materials Science, Multidisciplinary
Sayak Ghosh, Thomas G. Kiely, Arkady Shekhter, F. Jerzembeck, N. Kikugawa, Dmitry A. Sokolov, A. P. Mackenzie, B. J. Ramshaw
Summary: Recent experiments have revealed the presence of a two-component superconducting order parameter in Sr2RuO4. Ultrasound attenuation measurements using resonant ultrasound spectroscopy show a seven-fold increase in compressional sound attenuation immediately below the critical temperature Tc, while no increase is observed in shear sound attenuation. This suggests the presence of domain walls separating different configurations of the superconducting order parameter, resulting in an inhomogeneous superconducting state composed of two distinct OPs.
Article
Materials Science, Multidisciplinary
L. Pili, A. Steppke, M. E. Barber, F. Jerzembeck, C. W. Hicks, P. C. Guruciaga, D. Prabhakaran, R. Moessner, A. P. Mackenzie, S. A. Grigera, R. A. Borzi
Summary: This study investigates the metamagnetic transitions in topological metamagnets, finding a single transition line for two materials with different magnetic interactions. The transitions exhibit distinct magnetization characteristics and sensitivity to changes in the material's stress environment.