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Title: Fractional charge and emergent mass hierarchy in diagonal two-leg t J cylinders

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4]
  1. Tsinghua Univ., Beijing (China). Inst. for Advanced Study; Stanford Univ., CA (United States). Dept. of Physics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  3. Tsinghua Univ., Beijing (China). Inst. for Advanced Study; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  4. Stanford Univ., CA (United States). Dept. of Physics

Here, we define a class of “diagonal” t $$-$$ J ladders rotated by π / 4 relative to the canonical lattice directions of the square lattice, and study it using density matrix renormalization group. Here, we focus on the two-leg cylinder with a doped hole concentration near x = $$\frac{1}{4}$$ . At exactly x = $$\frac{1}{4}$$, the system forms a period 4 charge density wave and exhibits spin-charge separation. Slightly away from $$\frac{1}{4}$$ doping, we observe several topologically distinct types of solitons with well-defined fractionalized quantum numbers. Remarkably, given the absence of any obvious small parameter, the effective masses of the emergent solitons differ by several orders of magnitude.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
11474175; AC02-76SF00515; DMR 1265593
OSTI ID:
1369403
Alternate ID(s):
OSTI ID: 1361571
Journal Information:
Physical Review B, Vol. 95, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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