Spectral asymptotics at thresholds for a Dirac-type operator on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">Z</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math>
Spectral asymptotics at thresholds for a Dirac-type operator on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">Z</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math>
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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msup>< 上狄拉克型算子阈值处的谱渐近
DOI:
10.1016/j.jfa.2022.109743
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发表时间:
2022
影响因子:
1.7
通讯作者:
G. Raikov
中科院分区:
文献类型:
--
作者:
P. Miranda;D. Parra;G. Raikov
In this article, we provide the spectral analysis of a Dirac-type operator on Z 2 by describing the behavior of the spectral shift function associated with a sign–definite trace–class perturbation by a multiplication operator. We prove that it remains bounded outside a single threshold and obtain its main asymptotic term in the unbounded case. Interestingly, we show that the constant in the main asymptotic term encodes the interaction between a flat band and whole non–constant bands. The strategy used is the reduction of the spectral shift function to the eigenvalue counting function of some compact operator which can be studied as a toroidal pseudo–differential operator.
DOI:
--
发表时间:
2012
期刊:
Ann. Henri Poincare
影响因子:
--
作者:
Kazufumi Kimoto;Sho Matsumoto and Masato Wakayama;T. Ikeda;近藤武夫・中邑賢龍;H.Nakamura;H. isozaki and E. Korotyaev
通讯作者:
H. isozaki and E. Korotyaev