TY - JOUR
T1 - Measurement of energy relaxation in quantum Hall Edge states utilizing quantum point contacts
AU - Otsuka, Tomohiro
AU - Sugihara, Yuuki
AU - Yoneda, Jun
AU - Nakajima, Takashi
AU - Tarucha, Seigo
PY - 2014/1/15
Y1 - 2014/1/15
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.83.014710
DO - 10.7566/JPSJ.83.014710
M3 - Article
AN - SCOPUS:84897759712
SN - 0031-9015
VL - 83
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 1
M1 - 014710
ER -