Landau and spin levels in InAs quantum wells resolved with in-plane and parallel magnetic fields

Brosig, S.; Ensslin, Klaus; Brar, B.; Thomas, M.; Kroemer, H.

doi:10.1016/s0921-4526(98)00520-1

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…The magnitude of the g-factor in our quantum wells can be determined by temperature dependent measurements or via experiments where the magnetic field in tilted with respect to the sample surface. We find in both cases values for the g-factor of |g| ≈ 12 − 15 [22]. This makes InAs-AlSb quantum wells promising candidates for spin-related experiments.…”

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confidence: 66%

Zero-field spin splitting in InAs-AlSb quantum wells revisited

et al. 1999

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We present magnetotransport experiments on high-quality InAs-AlSb quantum wells that show a perfectly clean single-period Shubnikov-de Haas oscillation down to very low magnetic fields. In contrast to theoretical expectations based on an asymmetry induced zero-field spin splitting, no beating effect is observed. The carrier density has been changed by the persistent photo conductivity effect as well as via the application of hydrostatic pressure in order to influence the electric field at the interface of the electron gas. Still no indication of spin splitting at zero magnetic field was observed in spite of highly resolved Shubnikov- de Haas oscillations up to filling factors of 200. This surprising and unexpected result is discussed in view of other recently published data.Comment: 4 pages, 3 figures, submitted to Phys. Rev.

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confidence: 66%

Zero-field spin splitting in InAs-AlSb quantum wells revisited

et al. 1999

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“…This interplay between pronounced even-and odd-integer filling factor minima occurs for a series of angles. It also shows up in the respective quantum Hall plateaus [9].…”

Section: Level Crossing In the Single Particle Regimementioning

confidence: 86%

“…The analysis in terms of a picture of non-interacting electrons has proven very powerful for the analysis of energy spectra in Si-MOSFETs [3], InAs-GaSb superlattices [4], InAs-GaSb quantum wells [5], GaAs-AlGaAs heterostructures [6], GaInAs/InP heterostructures [7] and Si/SiGe heterostructures [8]. In this paper we focus on InAs-AlSb quantum wells and extend preliminary studies on this material system [9]. We present several features that are perfectly well explained in the existing single-particle picture, namely 1. the appearance and disappearance of even-and odd-integer SdH minima as a function of tilt angle, 2. a Zeman splitting as large as five times the Landau splitting for tilt angles around 87 • , and 3. a g-factor for InAs of about 13 in agreement with considerations based on conduction band non-parabolicity [10].…”

Section: Introductionmentioning

confidence: 87%

“…This interplay between pronounced even-and odd-integer filling factor minima occurs for a series of angles. It also shows up in the respective quantum Hall plateaus [9]. Figure 1 shows magnetoresistance traces at specific tilt angles where either SdH minima occur only at eveninteger filling factors, at even and odd, or only at odd integer filling factors.…”

Section: Level Crossing In the Single Particle Regimementioning

confidence: 94%

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InAs-AlSb quantum wells in tilted magnetic fields

et al. 2000

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InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method we find for magnetic fields up to 28 T that the spin splitting can be as large as 5 times the Landau splitting. We find a value of the g-factor of |g| ≈ 13. For small even-integer filling factors the corresponding minima in the Shubnikov-de Haas oscillations cannot be tuned into maxima for arbitrary tilt angles. This indicates the anti-crossing of neighboring Landau and spin levels. Furthermore we find for particular tilt angles a crossover from even-integer dominated Shubnikov-de Haas minima to odd-integer minima as a function of magnetic field.73. 50.-h, 72.20.-i, 72.90.+y

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“…Refs. 51, 52 and references therein), InAs quanutm wells 53 , graphene 54 , polar ZnO/Mg x Zn 1−x O interfaces 55 . In all of these systems, edge excitations can interact strongly and could be in an E 8 phase at ν = 8 or the D + 12 phase or the E 8 ⊕ I 4 phase at ν = 12.…”

Section: Discussionmentioning

confidence: 99%

Bulk-edge correspondence in (2 + 1)-dimensional Abelian topological phases

et al. 2014

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The same bulk two-dimensional topological phase can have multiple distinct, fully-chiral edge phases. We show that this can occur in the integer quantum Hall states at ν = 8 and 12, with experimentally-testable consequences. We show that this can occur in Abelian fractional quantum Hall states as well, with the simplest examples being at ν = 8/7, 12/11, 8/15, 16/5. We give a general criterion for the existence of multiple distinct chiral edge phases for the same bulk phase and discuss experimental consequences. Edge phases correspond to lattices while bulk phases correspond to genera of lattices. Since there are typically multiple lattices in a genus, the bulk-edge correspondence is typically one-to-many; there are usually many stable fully chiral edge phases corresponding to the same bulk. We explain these correspondences using the theory of integral quadratic forms. We show that fermionic systems can have edge phases with only bosonic low-energy excitations and discuss a fermionic generalization of the relation between bulk topological spins and the central charge. The latter follows from our demonstration that every fermionic topological phase can be represented as a bosonic topological phase, together with some number of filled Landau levels. Our analysis shows that every Abelian topological phase can be decomposed into a tensor product of theories associated with prime numbers p in which every quasiparticle has a topological spin that is a p n -th root of unity for some n. It also leads to a simple demonstration that all Abelian topological phases can be represented by U(1) N Chern-Simons theory parameterized by a K-matrix.

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Landau and spin levels in InAs quantum wells resolved with in-plane and parallel magnetic fields

Cited by 8 publications

References 7 publications

Zero-field spin splitting in InAs-AlSb quantum wells revisited

Zero-field spin splitting in InAs-AlSb quantum wells revisited

InAs-AlSb quantum wells in tilted magnetic fields

Bulk-edge correspondence in (2 + 1)-dimensional Abelian topological phases

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