Article
Chemistry, Multidisciplinary
Dudong Feng, Xiaolong Yang, Xiulin Ruan
Summary: We demonstrate the potential of engineering phonon scattering, such as through isotope enrichment and temperature modulation, in achieving unconventional radiative heat transfer at the nanoscale between two boron arsenide bulks. This has promising applications in nonlinear thermal circuit components. Our work proposes a heat flux regulator and other nonlinear thermal radiative devices, benefiting from the design space enabled by isotope and temperature engineering of the phonon linewidth. Our findings highlight the capability of temperature and isotope engineering in designing and optimizing nonlinear radiative thermal devices and demonstrate the potential of phonon engineering in thermal radiative transport.
Article
Thermodynamics
Milad Mozafarifard, Yiliang Liao, Qiong Nian, Yan Wang
Summary: This research examines electron-phonon coupled thermal transport in heterogeneous systems under femtosecond laser pulses. A validated two-temperature time-fractional (2T-TF) model is presented, which is more accurate and less complex than traditional models. The 2T-TF model can be easily applied to different thermal resistances and can reliably predict thermal transport in various system configurations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Multidisciplinary Sciences
Qinshu Li, Fang Liu, Song Hu, Houfu Song, Susu Yang, Hailing Jiang, Tao Wang, Yee Kan Koh, Changying Zhao, Feiyu Kang, Junqiao Wu, Xiaokun Gu, Bo Sun, Xinqiang Wang
Summary: This study reveals that even for materials with similar Debye temperatures, a significant portion of phonons can transport inelastically across interfaces at high temperatures, greatly enhancing the interface thermal conductance. The sharpness of the interface strongly affects the phonon transport process. These findings provide new insights and opportunities for engineering interface thermal conductance in microelectronics materials.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
G. Stefanou, F. Menges, B. Boehm, K. A. Moran, J. Adams, M. Ali, M. C. Rosamond, B. Gotsmann, R. Allenspach, G. Burnell, B. J. Hickey
Summary: Through scanning thermal microscopy, the spatial distribution of temperatures in a nanoscale device was mapped, with an analytical model explaining thermal diffusion over the measured temperature range and injector-detector separation. Below 60 K, the characteristic diffusion lengths of Peltier and Joule heat show remarkable differences, possibly due to the onset of ballistic phonon heat transfer in the substrate.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Xinglin Xiao, Yali Mao, Biwei Meng, Guoliang Ma, Kristina Husekova, Fridrich Egyenes, Alica Rosova, Edmund Dobrocka, Peter Elias, Milan Tapajna, Filip Gucmann, Chao Yuan
Summary: Different phases of Ga2O3 have distinct thermal transport properties. The thermal conductivity (TC) of alpha-Ga2O3 is larger than that of beta and kappa-Ga2O3, while the TC of bulk alpha and beta-Ga2O3 are similar. The thermal boundary conductance (TBC) at the Ga2O3/sapphire interface shows phase-dependence. This study provides insight into the phonon transport mechanism and contributes to the thermal management of Ga2O3-based devices.
Article
Chemistry, Physical
Hengrui Yang, Weitang Li, Jiajun Ren, Zhigang Shuai
Summary: This study proposes a nearly exact method to evaluate the time-dependent current and occupation number in a molecular junction with strong electron-phonon coupling. The oscillation period and amplitude of the current are found to be dependent on the electron-phonon coupling strength and energy level alignment. A new approximation is introduced to explain the bistability phenomenon and steady currents in the strong electron-phonon coupling regime, and comparisons are made with other methods. The entropy of different orderings is also explored, and the thermal Bogoliubov transformation is used for finite-temperature analysis.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Chemistry, Multidisciplinary
Anja Hanisch-Blicharski, Verena Tinnemann, Simone Wall, Fabian Thiemann, Thorben Groven, Jonas Fortmann, Mohammad Tajik, Christian Brand, Bengt-Olaf Frost, Alexander von Hoegen, Michael Horn-von Hoegen
Summary: Heat transfer through heterointerfaces is hindered by thermal boundary resistance due to elastic properties discontinuity. The cooling process is significantly slowed down by the violation of Boltzmann equipartition theorem in the angular phonon phase space, where phonons are trapped in the film and bottlenecked by repopulation of states for cooling. This nonequilibrium state in the phonon phase space reduces thermal interface conductance but can be manipulated for tailored heat transfer.
Article
Chemistry, Physical
Mayra Peralta, Steven Feijoo, Solmar Varela, Rafael Gutierrez, Gianaurelio Cuniberti, Vladimiro Mujica, Ernesto Medina
Summary: We investigate the role of electron-spin-phonon coupling in DNA using an effective model Hamiltonian and its connection to the Chiral-Induced Spin Selectivity (CISS) effect. The semiclassical electron transfer in a tight-binding model of DNA with intrinsic spin-orbit coupling is described using the envelope function approach. We find that only acoustic modes exhibit spin-phonon coupling, while optical modes show electron-phonon interaction without spin coupling. An effective Hamiltonian is derived, in which the eigenstates carry spin currents protected by spin-inactive stretching optical modes. The stronger interaction between optical phonons and electrons allows for the decoherence effects and the spin filtering effects observed in CISS.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Ali Goker, Huseyin Aksu, Barry D. Dunietz
Summary: This study investigates the impact of plasmon-exciton coupling and electron-phonon coupling on entropy current, revealing that electron-phonon coupling can be used to control the entropy current in the system. The entropy current decreases monotonically with increasing temperature, but an anomaly of enhanced current is observed near 42 times the system's Kondo temperature due to electron-phonon coupling.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Multidisciplinary Sciences
Shuyi Liu, Adnan Hammud, Ikutaro Hamada, Martin Wolf, Melanie Mueller, Takashi Kumagai
Summary: Coherent phonon spectroscopy is a method to study ultrafast lattice dynamics and its coupling to other degrees of freedom. In this study, nanoscale coherent phonon spectroscopy was achieved using ultrafast laser-induced scanning tunneling microscopy in a plasmonic junction. The localized excitation of coherent phonons in ultrathin zinc oxide films and their detection via photoinduced tunneling current through an electronic resonance allowed for the observation of nanoscale spatial variations in phonon dynamics that correlated with the distribution of electronic local density of states resolved by scanning tunneling spectroscopy.
Article
Thermodynamics
T. Helmig, T. Goettlich, R. Kneer
Summary: The thermal contact resistance is a crucial parameter for modeling interface heat transfer in multicomponent solid systems. Current experimental approaches mainly focus on conforming contact scenarios and neglect the macroscopic resistance in non-conforming contact scenarios. In this study, an inverse evaluation approach is proposed to quantitatively evaluate both microscale and macroscale thermal resistances. By using infrared thermography and the conjugate gradient method, future comprehensive experimental studies can be conducted to optimize the design and layout of thermo-mechanical systems.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Nanoscience & Nanotechnology
O. Florez, G. Arregui, M. Albrechtsen, R. C. Ng, J. Gomis-Bresco, S. Stobbe, C. M. Sotomayor-Torres, P. D. Garcia
Summary: Nanopatterned materials have the capability to control mechanical vibrations and enable the suppression of vibrations and propagation of hypersonic guided modes at room temperature. The structuring of solids to possess a phononic stop band can eliminate thermal vibrations. Experimental results demonstrate that the shamrock crystal geometry on a nanostructured silicon membrane can efficiently manipulate phonons, with potential applications in optomechanics and signal processing transduction.
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Philipp Strasberg, Christopher W. Waechtler, Gernot Schaller
Summary: There are two paradigms for studying nanoscale engines: autonomous models and models using time-dependent control fields. While the latter offers theoretical simplifications, its practical utility has been questioned. By constructing an autonomous model, a thermodynamic cycle was implemented in a certain parameter regime, but analysis of a thermodynamic cycle for a single-electron working fluid is not justified. Further challenges remain in autonomously implementing the more studied Carnot and Otto cycles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Chenjing Quan, Xiao Xing, Tingyuan Jia, Zeyu Zhang, Chunwei Wang, Sihao Huang, Zhengzheng Liu, Juan Du, Yuxin Leng
Summary: The charge transfer process in two-dimensional graphene/transition metal dichalcogenides heterostructures was investigated. The study revealed the correlation between the hot phonon bottleneck effect in graphene and the charge transfer process. The existence of interlayer charge transfer in the heterostructure and its dependence on pump fluence were confirmed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Applied
Bernd Gotsmann, Andrea Gemma, Dvira Segal
Summary: This Perspective discusses the concepts, theoretical and experimental progress in the field of quantized phonon transport, with a focus on channels such as molecular systems. It highlights open questions and research opportunities and emphasizes the recent advancements in experimental capabilities.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
F. Detcheverry
Article
Physics, Multidisciplinary
Samy Merabia, Francois Detcheverry
Article
Physics, Fluids & Plasmas
Christophe Belin, Laurent Joly, Francois Detcheverry
PHYSICAL REVIEW FLUIDS
(2016)
Article
Physics, Multidisciplinary
Joseph d'Alessandro, Alexandre P. Solon, Yoshinori Hayakawa, Christophe Anjard, Francois Detcheverry, Jean-Paul Rieu, Charlotte Riviere
Article
Mechanics
A. Titta, M. Le Merrer, F. Detcheverry, P. D. M. Spelt, A. -L. Biance
JOURNAL OF FLUID MECHANICS
(2018)
Article
Multidisciplinary Sciences
F. Ginot, I. Theurkauff, F. Detcheverry, C. Ybert, C. Cottin-Bizonne
NATURE COMMUNICATIONS
(2018)
Article
Physics, Multidisciplinary
Laurent Joly, Francois Detcheverry, Anne-Laure Biance
PHYSICAL REVIEW LETTERS
(2014)
Article
Polymer Science
Yang Wang, Gaetan Maurel, Marc Gouty, Francois Detcheverry, Samy Merabia
Article
Physics, Applied
Ali Alkurdi, Julien Lombard, Francois Detcheverry, Samy Merabia
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Fluids & Plasmas
Dolachai Boniface, Cecile Cottin-Bizonne, Francois Detcheverry, Christophe Ybert
Summary: The research focuses on interfacial swimmers that propel themselves by releasing surfactants, with a key role played by Marangoni effects. Low Pe* regime shows bistability with threshold Marangoni number, while high Pe* regime features a robust scaling law with exponent close to 3/4.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Physics, Fluids & Plasmas
Thomas Bickel, Francois Detcheverry
Summary: This study investigates the Marangoni spreading of surface-active molecules at a liquid interface and provides fully explicit solutions for different initial surfactant distributions. The influence of surface diffusion is also discussed. The findings of this study can serve as reference solutions for experimental testing of Marangoni spreading with fluorescent or photoswitchable surfactants.
Article
Physics, Multidisciplinary
Julien Lombard, Julien Lam, Francois Detcheverry, Thierry Biben, Samy Merabia
Summary: Plasmonic vapor nanobubbles can emit strong pressure waves when generated around a laser-heated nanoparticle in water, especially when the fluid is in a supercritical state. These waves can induce spatially and temporally localized damage, with acoustic-mediated perforation found to be more efficient than nanobubble expansion for breaching cell membranes.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Fluids & Plasmas
Dolachai Boniface, Cecile Cottin-Bizonne, Ronan Kervil, Christophe Ybert, Francois Detcheverry
Article
Physics, Fluids & Plasmas
Francois Detcheverry