Metallic surface electronic state in half-Heusler compounds<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi></mml:mrow></mml:math>PtBi (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>=</mml:mo></mml:mrow></mml:math>Lu, Dy, Gd)

Liu, Chang; Lee, Yongbin; Kondo, Takeshi; Mun, E. D.; Caudle, M. L.; Harmon, B. N.; Bud’ko, Sergey L.; Canfield, Paul C.; Kaminski, Adam

doi:10.1103/physrevb.83.205133

Cited by 102 publications

(83 citation statements)

References 28 publications

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“…The ARPES experiments done on RPtBi (R = Lu, Dy, Gd) found metallic surface states distinct from the bulk bands, but the surface-band structure does not appear to support a topological origin. 152) Interestingly, superconductivity has been found in LaPtBi 153) and YPtBi; 154) if those materials are indeed topological, the fate of the surface states in the superconducting state is an intriguing issue.…”

Section: Topological Semimetalmentioning

confidence: 99%

Topological Insulator Materials

2013

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Topological insulators represent a new quantum state of matter which is characterized by peculiar edge or surface states that show up due to a topological character of the bulk wave functions. This review presents a pedagogical account on topological insulator materials with an emphasis on basic theory and materials properties. After presenting a historical perspective and basic theories of topological insulators, it discusses all the topological insulator materials discovered as of May 2013, with some illustrative descriptions of the developments in materials discoveries in which the author was involved. A summary is given for possible ways to confirm the topological nature in a candidate material. Various synthesis techniques as well as the defect chemistry that are important for realizing bulk-insulating samples are discussed. Characteristic properties of topological insulators are discussed with an emphasis on transport properties. In particular, the Dirac fermion physics and the resulting peculiar quantum oscillation patterns are discussed in detail. It is emphasized that proper analyses of quantum oscillations make it possible to unambiguously identify surface Dirac fermions through transport measurements. The prospects of topological insulator materials for elucidating novel quantum phenomena that await discovery conclude the review.

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Section: Topological Semimetalmentioning

confidence: 99%

Topological Insulator Materials

2013

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“…So half-Heusler compounds might be the best platform to study the Majorana fermion in topological superconductors [58], dynamical axion field in topological anti-ferromagnetic phase [59], and quantum anomalous Hall effect (QAH) in topological ferromagnetic phase [60]. Recently, some ARPES and transport experiments already have been reported for half-Heusler compounds [61][62][63].…”

Section: Review @ Rrlmentioning

confidence: 99%

Topological insulators from the perspective of first‐principles calculations

Zhang

2012

Physica Rapid Research Ltrs

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Abstractmagnified imageTopological insulators are new quantum states with helical gapless edge or surface states inside the bulk band gap. These topological surface states are robust against weak time‐reversal invariant perturbations without closing the bulk band gap, such as lattice distortions and non‐magnetic impurities. Recently a variety of topological insulators have been predicted by theories, and observed by experiments. First‐principles calculations have been widely used to predict topological insulators with great success. In this review, we summarize the current progress in this field from the perspective of first‐principles calculations. First of all, the basic concepts of topological insulators and the frequently‐used techniques within first‐principles calculations are briefly introduced. Secondly, we summarize general methodologies to search for new topological insulators. In the last part, based on the band inversion picture first introduced in the context of HgTe, we classify topological insulators into three types with s–p, p–p and d–f, and discuss some representative examples for each type.magnified imageSurface states of topological insulator Bi2Se3 consist of a single Dirac cone, as obtained from first‐principles calculations.(© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…There is a lack of experimental techniques to be compared with the most reliable probe to these states, which is angle resolved photoemission spectroscopy (ARPES). [6][7][8][9][10] Previous theoretical predictions 11 claim that an impurity in a nontrivial matrix could bind to elementary quasiparticles excitations and, possibly, reflect locally the topology of the system. The half-Heusler intermetallic family RTBi (T = Pd, Pt) is a valuable platform to explore experimental hints of the nontrivial/trivial topology.…”

Section: Introductionmentioning

confidence: 99%

Diffusive-like effects and possible non trivial local topology on the half-Heusler YPdBi compound

et al. 2018

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The non-ambiguous experimental identification of topological states of matter is one of the main interesting problems regarding this new quantum state of matter. In particular, the half-Heusler family RMT (R = rare-earth, T = Pd, Pt or Au and T = Bi, Sb, Pb or Sn) could be a useful platform to explore these states due to their cubic symmetry and the topological properties tunable via their unit cell volume and/or the nuclear charges of the M and T atoms. In this work, we report electron spin resonance (ESR) and complementary macroscopic measurements in the Nd3 + -doped putative topologically trivial semimetal YPdBi. Following the Nd3 + ESR lineshape as a function of microwave power, size of the particle and temperature, we have been able to observe an evolution from a Dysonian lineshape to a diffusive-like lineshape. Furthermore, the Nd3 + ESR intensity saturation is concentration dependent, which could be due to a phonon-bottleneck process. Comparing these results with the Nd3 + -doped YPtBi, we discuss a possible scenario in which the Nd3 + ions could locally tune the topological properties of the system.

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Metallic surface electronic state in half-Heusler compoundsRPtBi (R=Lu, Dy, Gd)

Cited by 102 publications

References 28 publications

Topological Insulator Materials

Topological Insulator Materials

Topological insulators from the perspective of first‐principles calculations

Diffusive-like effects and possible non trivial local topology on the half-Heusler YPdBi compound

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