173 citations · 261 across the 30 of their papers we have counts for
32 papers
The often overlooked role of sound in liquid thermal transport
Kamran Behnia
Formulated a hundred years ago, the Bridgman formula for thermal conductivity of liquids postulates a proportionality between sound velocity and thermal conductivity. This designat…
Thermal Hall effect in elemental niobium, a two-gap superconductor
Jing Zhang, Xiaokang Li, Kamran Behnia +1
Niobium holds a pivotal place in superconductivity history: it is not only the elemental superconductor with the highest critical temperature, but also a long-standing candidate fo…
Deviation from Fermi-liquid resistivity caused by collective transport
Kamran Behnia
`Fermi-liquid behavior' is nowadays used as a shorthand for quadratic temperature dependence of the electrical resistivity. In a metal, for this to occur, electrons must be cooled…
Electron-phonon coupled hydrodynamics in semimetal TaAs_2
Shan Jiang, Wei Xie, Xiaokang Li +2
Hydrodynamic corrections to diffusive transport can arise when momentum-conserving collisions between quasiparticles become prominent, and they have been documented for both electr…
Observation of thermal Hall effect in diamond
Marcin Matusiak, Andrzej Ptok, Maria Szlawska +1
Numerous insulators, including non-magnetic ones, have been unexpectedly found to display a finite thermal Hall signal, which has stimulated debate about its origin. Here, we repor…
Hydrodynamics of the viscous electron fluid in cadmium
Xiaodong Guo, Xiaokang Li, Benoît Fauqué +4
Thanks to electron-electron (-) collisions conserving momentum, metallic electron fluids are viscous. Yet, this viscosity is rarely detectable in bulk transport. Here, we rep…
Thermal Hall resistivity and transverse entropy production in a phonon gas
Xiaodong Guo, Xiaokang Li, Alaska Subedi +2
Most theories of the phonon thermal Hall effect ignore phonon-phonon interactions. Here, by recalling the Senftleben-Beenakker effect in molecular gases, we argue that a magnetic f…
Phonon Thermal Hall Effect in quartz and its absence in silica
Yu Ling, Benoît Fauqué, Kamran Behnia
The observation of a misalignment between the applied heat flux and the measured temperature gradient in insulating solids induced by magnetic field has become a subject of experim…
Electron-electron and electron-phonon collision cross sections in CsV3Sb5
Charles Menil, Andrea Capa Salinas, Stephen D. Wilson +2
AV3Sb5 (A=K, Rb, Cs) are kagome metals and superconductors, attracting much recent attention as nexus of multiple quantum states. Here, through a systematic study of electric and t…
Incipient modulated phase in SrCaTiO
Benoît Fauqué, Daniel A. Chaney, Philippe Bourges +8
Nanometer-scale modulations can spontaneously emerge in complex materials when multiple degrees of freedom interact. Here we demonstrate that ferroelectric SrCaTiO…
Phonon Thermal Hall Effect: The Roles of Disorder, Annealing, and Metallic Contacts
Qiaochao Xiang, Xiaokang Li, Xiaodong Guo +2
The phonon thermal Hall effect (THE) is a ubiquitous yet poorly understood phenomenon in insulators. Its microscopic origin remains debated, partly due to significant sample-depend…
T-square electric resistivity and its thermal counterpart in RuO
Yu Ling, Florent Pawula, Ramzy Daou +2
We present a study of low-temperature electric and thermal transport in RuO, a metallic oxide which has attracted much recent attention. Careful scrutiny of electric resistivit…
Thermal Hall conductivity of semimetallic graphite dominated by ambipolar phonon drag
Qiaochao Xiang, Xiaokang Li, Xiaodong Guo +2
It is now known that in addition to electrons, other quasi-particles such as phonons and magnons can also generate a thermal Hall signal. Graphite is a semimetal with extremely mob…
Comment on `High-resolution Measurements of Thermal Conductivity Matrix and Search for Thermal Hall Effect in LaCuO'
Shan Jiang, Qiaochao Xiang, Benoît Fauqué +3
Recently, Jiayi Hu and co-workers reported that they did not resolve any thermal Hall signal in LaCuO by `high resolution' measurements, setting an upper bound of $|κ_{xy}|…
Nernst effect and its thickness dependence in superconducting NbN films
Thomas Bouteiller, Arthur Marguerite, Ramzy Daou +6
Superconducting thin films and layered crystals display a Nernst signal generated by short-lived Cooper pairs above their critical temperature. Several experimental studies have br…
Comment on Unusual violation of the Wiedemann-Franz law at ultralow temperatures in topological compensated semimetals
Kamran Behnia, Shiyan Li, Johnpierre Paglione +1
Recently, Wang et al. [1] reported on an unusual violation of Wiedemann-Franz law in three semimetals. We compare their observations to our observations in a variety of systems, wh…
Phonon thermal Hall as a lattice Aharonov-Bohm effect
Kamran Behnia
In a growing list of insulators, experiments find that magnetic field induces a misalignment between the heat flux and the thermal gradient vectors. This phenomenon, known as the p…
Scalable Sondheimer oscillations driven by commensurability between two quantizations
Xiaodong Guo, Xiaokang Li, Lingxiao Zhao +2
The electrical conductivity of metallic crystals exhibits size effects when the electron mean free path exceeds the sample thickness. One such phenomenon, known as Sondheimer oscil…
Deep-lying semi-Dirac fermions in hexagonal close-packed cadmium
Alaska Subedi, Kamran Behnia
Semi-Dirac fermions are massless in one direction and massive in the perpendicular directions. Such quasiparticles have been proposed in various contexts in condensed matter. Using…
Phonon hydrodynamic regimes in sapphire
Takuya Kawabata, Kosuke Shimura, Yuto Ishii +7
When an ideal insulator is cooled, four regimes of thermal conductivity are expected to emerge one after another. Two of these, the Ziman and the Poiseuille, are hydrodynamic regim…
Magnetic memory and distinct spin populations in ferromagnetic Co3Sn2S2
Charles Menil, Brigitte Leridon, Antonella Cavanna +7
Co3Sn2S2, a ferromagnetic Weyl semi-metal with Co atoms on a kagome lattice, has generated much recent attention. Experiments have identified a temperature scale below the Curie te…
Angle-dependent planar thermal Hall effect by quasi-ballistic phonons in black phosphorus
Xiaokang Li, Xiaodong Guo, Zengwei Zhu +1
The origin of the phonon thermal Hall effect in insulators is a matter of ongoing debate. The large amplitude of the signal in an elemental non-magnetic solid, such as black phosph…
Electronic thermal resistivity and quasi-particle collision cross-section in semi-metals
Adrien Gourgout, Arthur Marguerite, Benoît Fauqué +1
Electron-electron collisions lead to a T-square component in the electrical resistivity of Fermi liquids. The case of liquid He illustrates that the \textit{thermal} resitivity…
Tuning the BCS-BEC crossover of electron-hole pairing with pressure
Yuhao Ye, Jinhua Wang, Pan Nie +5
In graphite, a moderate magnetic field confines electrons and holes into their lowest Landau levels. In the extreme quantum limit, two insulating states with a dome-like field depe…