A5091528307- Thermal properties of materials
- Graphene research and applications
- Thermal Radiation and Cooling Technologies
- Advanced Thermodynamics and Statistical Mechanics
- High-pressure geophysics and materials
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Advanced Optical Sensing Technologies
- Noncommutative and Quantum Gravity Theories
- Machine Learning in Materials Science
- Advanced Mathematical Theories and Applications
- Thermography and Photoacoustic Techniques
- Advanced Thermoelectric Materials and Devices
- Physics of Superconductivity and Magnetism
- Advancements in Semiconductor Devices and Circuit Design
- Calibration and Measurement Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Neural Networks and Applications
- Atmospheric aerosols and clouds
Harvard University
2021
Cornell University
2016
Significance The concept of a supersolid state in solid 4 He was first suggested 1968, yet it only 2004 that experimental evidence for the existence this new matter presented. possible discovery long-sought created much excitement and followed, however, by theoretical work original interpretation not satisfactory. It is now clear many originally observed signals can be explained changes shear modulus cells. In experiments reported here, we have used an technique enables distinction between...
Hydrodynamic transport effectively describes the collective dynamics of fluids with well-defined thermodynamic quantities. With enhanced electron-electron interactions at elevated temperatures, behavior electrons in graphene minimal impurities can be depicted as a hydrodynamic flow charges. In this new regime, well-known rules Ohmic based on single electron picture no longer apply, necessitating consideration dynamics. particular, analogues Joule heating and thermal require viscous motion...
We develop Johnson noise thermometry applicable to mesoscopic devices with variable source impedance high bandwidth for fast data acquisition. By implementing differential measurement and two-stage matching, we demonstrate in the frequency range 120-250 MHz a wide sample resistance 30 {\Omega}-100 k{\Omega} tuned by gate voltages temperature. employ high-frequency, single-ended low amplifiers maintained at constant cryogenic temperature order maintain desired achieve thermometer calibration...
In the quest to unify quantum mechanics with general relativity, concept of gravitons as carriers gravitational force stands a pivotal yet unproven hypothesis. This work pioneers bold approach graviton condensation via an innovative ambient superconductor, synthesized through groundbreaking theoretically plausible physics process. Building on recent superconductivity breakthroughs, we introduce novel superconductor fabricated bombardment dilute Bose-Einstein condensate high-energy gamma...
We report low temperature measurements of bulk solid $^4$He in a two-frequency compound torsional oscillator with both annular and open cylinder sample geometries. The oscillators were designed to suppress period shifts arising from all known elastic effects $^4$He. At temperatures below 0.25 K, shift signals similar those reported by Kim Chan [Science {\bf 305}, 1941 (2004)] observed, albeit two orders smaller magnitude. A sizable fraction the observed are frequency-independent consistent...