Unconventional topological phase transition in non-symmorphic material KHgX (X = As, Sb, Bi)
نویسندگان
چکیده
منابع مشابه
Band structure engineering in (Bi(1-x)Sb(x))(2)Te(3) ternary topological insulators.
Topological insulators (TIs) are quantum materials with insulating bulk and topologically protected metallic surfaces with Dirac-like band structure. The most challenging problem faced by current investigations of these materials is to establish the existence of significant bulk conduction. Here we show how the band structure of topological insulators can be engineered by molecular beam epitaxy...
متن کاملمحاسبهی گرادیانهای میدان الکتریکی در ترکیبات X=Bi, Sb))UX2
در این مقاله خواص الکترونی ترکیبات پادفرومغناطیس X=Bi, Sb))UX2 را با محاسبات ابتدا به ساکن بر پایهی نظریه‌ی تابعی چگالی با استفاده از روش امواج تخت بهبودیافته بهعلاوه‌ی اربیتالهای موضعی APW+lo)) بررسی کردهایم. برای محاسبه‌ی جمله پتانسیل تبادلی- همبستگی از تقریبهای LDA، GGA، LDA+U، GGA+U و هم‌چنین روش انرژی تبادلی دقیق الکترونهای همبسته (EECE) استفاده کردهایم. گرادیانهای میدان الکتریکی...
متن کاملTwo-dimensional Topological Crystalline Insulator Phase in Sb/Bi Planar Honeycomb with Tunable Dirac Gap
We predict planar Sb/Bi honeycomb to harbor a two-dimensional (2D) topological crystalline insulator (TCI) phase based on first-principles computations. Although buckled Sb and Bi honeycombs support 2D topological insulator (TI) phases, their structure becomes planar under tensile strain. The planar Sb/Bi honeycomb structure restores the mirror symmetry, and is shown to exhibit non-zero mirror ...
متن کاملUnconventional transformation of spin Dirac phase across a topological quantum phase transition
The topology of a topological material can be encoded in its surface states. These surface states can only be removed by a bulk topological quantum phase transition into a trivial phase. Here we use photoemission spectroscopy to image the formation of protected surface states in a topological insulator as we chemically tune the system through a topological transition. Surprisingly, we discover ...
متن کاملTopological-metal to band-insulator transition in (Bi(1-x)In(x))2Se3 thin films.
By combining transport and photoemission measurements on (Bi(1-x)In(x))(2)Se(3) thin films, we report that this system transforms from a topologically nontrivial metal into a topologically trivial band insulator through three quantum phase transitions. At x ≈ 3%-7%, there is a transition from a topologically nontrivial metal to a trivial metal. At x ≈ 15%, the metal becomes a variable-range-hop...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: npj Computational Materials
سال: 2019
ISSN: 2057-3960
DOI: 10.1038/s41524-019-0201-4