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ΔTnoise as a robust diagnostic for chiral, helical and trivial edge modes
Sachiraj Mishra1,2, Colin Benjamin1,2
1School of Physical Sciences, National Institute of Science Education and Research, HBNI, Jatni 752050, India.
None:
In this article, we demonstrate thatΔTnoise provides a sensitive, practical probe for distinguishing chiral edge modes from topological helical and trivial (non-topological) helical edge transport. Measured under zero-current conditions,ΔTnoise reveals contrasts that conventional conductance measurements typically miss. Crucially,ΔTnoise requires no external energy input in the form of an applied voltage bias, yet encodes the same intrinsic information that shot noise yields in the zero-temperature, finite-bias limit, without the distorting effects of Joule heating. This absence of bias-induced heating makesΔTnoise both more precise and more reliable than conventional shot-noise approaches.
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