1. Department of Physics and Energy Harvest Storage Research Center, University of Ulsan, Ulsan 44610, Republic of Korea
2. Department of Physics, Nha Trang University, Nha Trang 650000, Vietnam
3. Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
4. Thermoelectric Conversion Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Republic of Korea
5. Quantum Technology Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
6. Department of Applied Physics, Integrated Education Institute for Frontier Science and Technology (BK21 Four) and Institute of Natural Sciences, Kyung Hee University, Yongin 17104, Republic of Korea