Avoided quantum criticality in exact numerical simulations of a single disordered Weyl cone
Avoided quantum criticality in exact numerical simulations of a single disordered Weyl cone
复制标题
在单个无序外尔锥的精确数值模拟中避免了量子临界
DOI:
10.1103/physrevb.102.100201
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发表时间:
2020
影响因子:
3.7
通讯作者:
Pixley, J. H.
中科院分区:
文献类型:
--
作者:
Wilson, Justin H.;Huse, David A.;Das Sarma, S.;Pixley, J. H.
Existing theoretical works differ on whether three-dimensional Dirac and Weyl semimetals are stable to a short-range-correlated random potential. Numerical evidence suggests the semimetal to be unstable, while some field-theoretic instanton calculations have found it to be stable. The differences go beyond method: the continuum field-theoretic works use a single, perfectly linear Weyl cone, while numerical works use tight-binding lattice models which inherently have band curvature and multiple Weyl cones. In this work, we bridge this gap by performing exact numerics on the same model used in analytic treatments, and we find that all phenomena associated with rare regions near the Weyl node energy found in lattice models persist in the continuum theory: The density of states is nonzero and exhibits an avoided transition. In addition to characterizing this transition, we find rare states and show that they have the expected behavior. The simulations utilize sparse matrix techniques with formally dense matrices; doing so allows us to reach Hilbert space sizes upwards ofstates, substantially larger than anything achieved before.
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影响因子:
3.7
作者:
Thibaud Louvet;D. Carpentier;A. A. Fedorenko
通讯作者:
A. A. Fedorenko
影响因子:
8.6
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["M. Buchhold
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["M. Buchhold
影响因子:
44.1
作者:
Armitage, N. P.;Mele, E. J.;Vishwanath, Ashvin
通讯作者:
Vishwanath, Ashvin
影响因子:
3.7
作者:
Buchhold, Michael;Diehl, Sebastian;Altland, Alexander
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Altland, Alexander
影响因子:
8.6
作者:
Sbierski, Bjoern;Pohl, Gregor;Brouwer, Piet W.
通讯作者:
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