Measurement of energy relaxation in quantum Hall Edge states utilizing quantum point contacts

Tomohiro Otsuka, Yuuki Sugihara, Jun Yoneda, Takashi Nakajima, Seigo Tarucha

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We demonstrated a method to probe local electronic states and energy relaxation in quantum Hall edge states utilizing quantum point contacts. We evaluated relaxation lengths in two cases; first, with electron tunneling, and second, only with energy exchange without tunneling between edge states. The results were consistent with previous experiments and validated our method with quantum point contacts. We applied this method to measure the energy relaxation length around a hotspot in quantum Hall regimes and revealed the possible short-distance relaxation process to be the relaxation due to energy exchange between edge states without electron tunneling.

Original languageEnglish
Article number014710
Journaljournal of the physical society of japan
Volume83
Issue number1
DOIs
Publication statusPublished - 2014 Jan 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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