What is recorded here?
Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.
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Scientific scope
Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.
Read the original work
- Observation of the fractional quantum spin Hall effect in moiré MoTe2 (arXiv2402.03294v2)
- Time-reversal symmetry breaking fractional quantum spin Hall insulator in moiré MoTe2 (arXiv2501.02525v3)
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People and systems
Kaifei Kang; Bowen Shen; Yichen Qiu; Kenji Watanabe; Takashi Taniguchi; Jie Shan; Kin Fai Mak; Kihong Lee; Zhengchao Xia; Yihang Zeng
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
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English catalogue narrative
Fractional spin-Hall transport and low-field symmetry diagnostics in twisted MoTe₂
Kang and colleagues measured local and nonlocal transport in small-angle twisted MoTe₂, finding connection-dependent conductance plateaus consistent with integer and fractional spin-Hall edge transport. At filling 3, the inferred edge contribution was near 3e²/(2h). Follow-up measurements on the same transport device resolved a finite hysteretic Hall response below about 20 mT, despite an almost zero response at larger fields. Magnetic circular dichroism in a nearby region supplied complementary evidence of spontaneous time-reversal symmetry breaking, narrowing interpretations of the fractional state.
Scientific scope
Fractional edge transport is inferred using contact-resistance calibration and a Landauer–Büttiker equilibration model; nonlocal signals depart from ideal values and bulk conduction can contribute. The optical probe samples a different region, with a slightly smaller twist angle and a higher base temperature, than the transport channel. Low-field hysteresis changes the early time-reversal-symmetric interpretation but does not identify a unique microscopic topological order. Fractional quasiparticle charge, non-Abelian statistics and protected computation were not directly demonstrated. The 2024 and 2025 preprints have different author lists; the final published version may contain additional changes.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Kaifei Kang; Bowen Shen; Yichen Qiu; Kenji Watanabe; Takashi Taniguchi; Jie Shan; Kin Fai Mak; Kihong Lee; Zhengchao Xia; Yihang Zeng
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.