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作者:Tomi Ohtsuki , Tomoki Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2017, Vol.86 (4)JPS
摘要:Three-dimensional random electron systems undergo quantum phase transitions and show rich phase diagrams. Examples of the phases are the band gap insulator, Anderson insulator, strong and weak topological insulators, Weyl semimetal, and diffusive metal. As in the previous pa...
作者:Tomi Ohtsuki , Tomohiro Mano
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2020, Vol.89 (2)JPS
摘要:Applications of neural networks to condensed matter physics are becoming popular and beginning to be well accepted. Obtaining and representing the ground and excited state wave functions are examples of such applications. Another application is analyzing the wave functions a...
作者:Keith Slevin , Tomi Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (10)JPS
摘要:Disordered non-interacting systems are classified into ten symmetry classes, with the unitary class being the most fundamental. The three and four-dimensional unitary universality classes are attracting renewed interest because of their relation to three-dimensional Weyl semi-met...
作者:Tomoki Ohtsuki , Tomi Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (12)JPS
摘要:Random electron systems show rich phases such as Anderson insulator, diffusive metal, quantum Hall and quantum anomalous Hall insulators, Weyl semimetal, as well as strong/weak topological insulators. Eigenfunctions of each matter phase have specific features, but owing to t...
作者:Tomohiro Mano , Tomi Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2017, Vol.86 (11)JPS
摘要:The three-dimensional Anderson model is a well-studied model of disordered electron systems that shows the delocalization–localization transition. As in our previous papers on two- and three-dimensional (2D, 3D) quantum phase transitions [ J. Phys. Soc. Jpn. 85 , 123706 (201...
作者:Keith Slevin , Tomi Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2018, Vol.87 (9)JPS
摘要:To date the most precise estimations of the critical exponent for the Anderson transition have been made using the transfer matrix method. This method involves the simulation of extremely long quasi one-dimensional systems. The method is inherently serial and is not well sui...
作者:Tomohiro Mano , Tomi Ohtsuki
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2019, Vol.88 (12)JPS
摘要:Quantum material phases such as the Anderson insulator, diffusive metal, and Weyl/Dirac semimetal as well as topological insulators show specific wave functions both in real and Fourier spaces. These features are well captured by convolutional neural networks, and the phase diagr...
作者:Tomi Ohtsuki , Bernhard Kramer , Yoshiyuki Ono
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1993, Vol.62 (1), pp.224-238JPS
摘要:The Anderson transition in three dimensional layered systems is investigated in the presence of a quantizing magnetic field perpendicular to the layers. The density of states is calculated. By computing numerically the modulus of the one-body Green's function, the system siz...
作者:Tomi Ohtsuki , Yoshiyuki Ono
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1990, Vol.59 (2), pp.637-648JPS
摘要:The equilibrium and non-equilibrium current distributions are investigated in the quantum Hall regime by using the finite cylinder model with a gate barrier potential at the middle of the system. The energy for the edge states of the n th Landau subband, Δ E ν...

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