@article {Talanov2021,
	title = {High-bandwidth, variable-resistance differential noise thermometry},
	journal = {Review of Scientific Instruments},
	volume = {92},
	year = {2021},
	month = {1},
	pages = {014904},
	publisher = {arXiv},
	abstract = {We develop Johnson noise thermometry applicable to mesoscopic devices with variable source impedance with high bandwidth for fast data acquisition. By implementing differential noise measurement and two-stage impedance matching, we demonstrate noise measurement in the frequency range 120-250 MHz with a wide sample resistance range 30 Ω-100 kΩ tuned by gate voltages and temperature. We employ high-frequency, single-ended low noise amplifiers maintained at a constant cryogenic temperature in order to maintain the desired low noise temperature. We achieve thermometer calibration with temperature precision up to 650 {\textmu}K on a 10 K background with 30 s of averaging. Using this differential noise thermometry technique, we measure thermal conductivity on a bilayer graphene sample spanning the metallic and semiconducting regimes in a wide resistance range, and we compare it to the electrical conductivity.},
	issn = {0034-6748},
	doi = {10.1063/5.0026488},
	url = {http://aip.scitation.org/doi/10.1063/5.0026488},
	author = {A. V. Talanov and J. Waissman and T. Taniguchi and K. Watanabe and P. Kim}
}
